March 2016 - Arch-security - lists.archlinux.org

[arch-security] [ASA-201603-27] jre8-openjdk-headless: sandbox escape
by Levente Polyak 29 Mar '16

29 Mar '16

Arch Linux Security Advisory ASA-201603-27 ========================================== Severity: Critical Date : 2016-03-29 CVE-ID : CVE-2016-0636 Package : jre8-openjdk-headless Type : sandbox escape Remote : Yes Link : https://wiki.archlinux.org/index.php/CVE Summary ======= The package jre8-openjdk-headless before version 8.u77-1 is vulnerable to sandbox escape leading to execution of unintended operations. Resolution ========== Upgrade to 8.u77-1. # pacman -Syu "jre8-openjdk-headless>=8.u77-1" The problem has been fixed upstream in version 8.u77. Workaround ========== None. Description =========== It was discovered that the security fix for CVE-2013-5838 was incomplete and still allowed remote attackers to escape the Java security sandbox mechanism. The root problem is that the Reflection API does not properly guarantee type safety when Method Handle objects were invoked across two different Class Loader namespaces. A part of the original patch was to use the "loadersAreRelated()" method to ensure that the two Class Loaders are related, which is a condition for correct type safety. However, this condition could be easily fulfilled by abusing certain behaviors in the class loading process, which could allow an attacker to bypass the type safety checks and ultimately escape the security sandbox mechanism. Impact ====== A remote attacker who is able to run an untrusted Java application or applet is able to bypass Java sandbox restrictions and execute unintended operations. References ========== http://www.oracle.com/technetwork/topics/security/alert-cve-2016-0636-29494… https://access.redhat.com/security/cve/CVE-2016-0636

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[arch-security] [ASA-201603-26] jre8-openjdk: sandbox escape
by Levente Polyak 29 Mar '16

29 Mar '16

Arch Linux Security Advisory ASA-201603-26 ========================================== Severity: Critical Date : 2016-03-29 CVE-ID : CVE-2016-0636 Package : jre8-openjdk Type : sandbox escape Remote : Yes Link : https://wiki.archlinux.org/index.php/CVE Summary ======= The package jre8-openjdk before version 8.u77-1 is vulnerable to sandbox escape leading to execution of unintended operations. Resolution ========== Upgrade to 8.u77-1. # pacman -Syu "jre8-openjdk>=8.u77-1" The problem has been fixed upstream in version 8.u77. Workaround ========== None. Description =========== It was discovered that the security fix for CVE-2013-5838 was incomplete and still allowed remote attackers to escape the Java security sandbox mechanism. The root problem is that the Reflection API does not properly guarantee type safety when Method Handle objects were invoked across two different Class Loader namespaces. A part of the original patch was to use the "loadersAreRelated()" method to ensure that the two Class Loaders are related, which is a condition for correct type safety. However, this condition could be easily fulfilled by abusing certain behaviors in the class loading process, which could allow an attacker to bypass the type safety checks and ultimately escape the security sandbox mechanism. Impact ====== A remote attacker who is able to run an untrusted Java application or applet is able to bypass Java sandbox restrictions and execute unintended operations. References ========== http://www.oracle.com/technetwork/topics/security/alert-cve-2016-0636-29494… https://access.redhat.com/security/cve/CVE-2016-0636

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[arch-security] [ASA-201603-25] jdk8-openjdk: sandbox escape
by Levente Polyak 29 Mar '16

29 Mar '16

Arch Linux Security Advisory ASA-201603-25 ========================================== Severity: Critical Date : 2016-03-29 CVE-ID : CVE-2016-0636 Package : jdk8-openjdk Type : sandbox escape Remote : Yes Link : https://wiki.archlinux.org/index.php/CVE Summary ======= The package jdk8-openjdk before version 8.u77-1 is vulnerable to sandbox escape leading to execution of unintended operations. Resolution ========== Upgrade to 8.u77-1. # pacman -Syu "jdk8-openjdk>=8.u77-1" The problem has been fixed upstream in version 8.u77. Workaround ========== None. Description =========== It was discovered that the security fix for CVE-2013-5838 was incomplete and still allowed remote attackers to escape the Java security sandbox mechanism. The root problem is that the Reflection API does not properly guarantee type safety when Method Handle objects were invoked across two different Class Loader namespaces. A part of the original patch was to use the "loadersAreRelated()" method to ensure that the two Class Loaders are related, which is a condition for correct type safety. However, this condition could be easily fulfilled by abusing certain behaviors in the class loading process, which could allow an attacker to bypass the type safety checks and ultimately escape the security sandbox mechanism. Impact ====== A remote attacker who is able to run an untrusted Java application or applet is able to bypass Java sandbox restrictions and execute unintended operations. References ========== http://www.oracle.com/technetwork/topics/security/alert-cve-2016-0636-29494… https://access.redhat.com/security/cve/CVE-2016-0636

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[arch-security] [ASA-201603-24] chromium: multiple issues
by Remi Gacogne 26 Mar '16

26 Mar '16

Arch Linux Security Advisory ASA-201603-24 ========================================== Severity: Critical Date : 2016-03-26 CVE-ID : CVE-2016-1646 CVE-2016-1647 CVE-2016-1648 CVE-2016-1649 CVE-2016-1650 Package : chromium Type : multiple issues Remote : Yes Link : https://wiki.archlinux.org/index.php/CVE Summary ======= The package chromium before version 49.0.2623.108-1 is vulnerable to multiple issues. Resolution ========== Upgrade to 49.0.2623.108-1. # pacman -Syu "chromium>=49.0.2623.108-1" The problem has been fixed upstream in version 49.0.2623.108. Workaround ========== None. Description =========== - CVE-2016-1646: Out-of-bounds read in V8. Credit to Wen Xu from Tencent KeenLab. - CVE-2016-1647: Use-after-free in Navigation. Credit to anonymous. - CVE-2016-1648: Use-after-free in Extensions. Credit to anonymous. - CVE-2016-1649: Buffer overflow in libANGLE. Credit to lokihardt working with HP's Zero Day Initiative / Pwn2Own. - CVE-2016-1650: Various fixes from internal audits, fuzzing and other initiatives. Impact ====== A remote attacker can cause a denial of service or have another unspecified impact on the affected host. References ========== http://googlechromereleases.blogspot.fr/2016/03/stable-channel-update_24.ht… https://access.redhat.com/security/cve/CVE-2016-1646 https://access.redhat.com/security/cve/CVE-2016-1647 https://access.redhat.com/security/cve/CVE-2016-1648 https://access.redhat.com/security/cve/CVE-2016-1649 https://access.redhat.com/security/cve/CVE-2016-1650

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[arch-security] [ASA-201603-23] expat: arbitrary code execution
by Remi Gacogne 24 Mar '16

24 Mar '16

Arch Linux Security Advisory ASA-201603-23 ========================================== Severity: Critical Date : 2016-03-24 CVE-ID : CVE-2015-1283 Package : expat Type : arbitrary code execution Remote : Yes Link : https://wiki.archlinux.org/index.php/CVE Summary ======= The package expat before version 2.1.1-1 is vulnerable to several integer overflows leading to arbitrary code execution. Resolution ========== Upgrade to 2.1.1-1. # pacman -Syu "expat>=2.1.1-1" The problem has been fixed upstream in version 2.1.1. Workaround ========== None. Description =========== Multiple integer overflows in the XML_GetBuffer() function in Expat through 2.1.0 allow remote attackers to cause a denial of service (heap-based buffer overflow) or possibly have unspecified other impact via crafted XML data, a related issue to CVE-2015-2716. Impact ====== A remote attacker can execute arbitrary code on the affected host by submitting a specially crafted XML file for parsing. Note that Expat is used in several products, some of them accepting untrusted XML files from the network. References ========== https://sourceforge.net/p/expat/bugs/528/ https://access.redhat.com/security/cve/CVE-2015-1283

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[arch-security] [ASA-201603-22] botan: multiple issues
by Remi Gacogne 24 Mar '16

24 Mar '16

Arch Linux Security Advisory ASA-201603-22 ========================================== Severity: High Date : 2016-03-24 CVE-ID : CVE-2016-2849 CVE-2016-2850 Package : botan Type : multiple issues Remote : Yes Link : https://wiki.archlinux.org/index.php/CVE Summary ======= The package botan before version 1.11.29-1 is vulnerable to multiple issues. Resolution ========== Upgrade to 1.11.29-1. # pacman -Syu "botan>=1.11.29-1" The problem has been fixed upstream in version 1.11.29. Workaround ========== None. Description =========== - CVE-2016-2849 (ECDSA side channel): ECDSA (and DSA) signature algorithms perform a modular inverse on the signature nonce k. The modular inverse algorithm used had input dependent loops, and it is possible a side channel attack could recover sufficient information about the nonce to eventually recover the ECDSA secret key. Found by Sean Devlin. - CVE-2016-2850 (Failure to enforce TLS policy): TLS v1.2 allows negotiating which signature algorithms and hash functions each side is willing to accept. However received signatures were not actually checked against the specified policy. This had the effect of allowing a server to use an MD5 or SHA-1 signature, even though the default policy prohibits it. The same issue affected client cert authentication. The TLS client also failed to verify that the ECC curve the server chose to use was one which was acceptable by the client policy. Impact ====== A remote attacker might be able to recover an ECDSA secret key by using a side channel attack. A remote attacker can downgrade the TLS signatures and hash functions to vulnerable algorithms like MD5 or SHA-1 even if they are explicitely prohibited. References ========== http://botan.randombit.net/security.html#id1 https://access.redhat.com/security/cve/CVE-2016-2849 https://access.redhat.com/security/cve/CVE-2016-2850

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[arch-security] [ASA-201603-21] thunderbird: multiple issues
by Remi Gacogne 20 Mar '16

20 Mar '16

Arch Linux Security Advisory ASA-201603-21 ========================================== Severity: Critical Date : 2016-03-20 CVE-ID : CVE-2016-1952 CVE-2016-1953 CVE-2016-1954 CVE-2016-1957 CVE-2016-1960 CVE-2016-1961 CVE-2016-1964 CVE-2016-1966 CVE-2016-1974 CVE-2016-1977 CVE-2016-2790 CVE-2016-2791 CVE-2016-2792 CVE-2016-2793 CVE-2016-2794 CVE-2016-2795 CVE-2016-2796 CVE-2016-2797 CVE-2016-2798 CVE-2016-2799 CVE-2016-2800 CVE-2016-2801 CVE-2016-2802 Package : thunderbird Type : multiple issues Remote : Yes Link : https://wiki.archlinux.org/index.php/CVE Summary ======= The package thunderbird before version 38.7.0-1 is vulnerable to multiple issues. Resolution ========== Upgrade to 38.7.0-1. # pacman -Syu "thunderbird>=38.7.0-1" The problem has been fixed upstream in version 38.7.0. Workaround ========== None. Description =========== - CVE-2016-1952 CVE-2016-1953 (arbitrary code execution): Mozilla developers fixed several memory safety bugs in the browser engine used in Firefox and other Mozilla-based products. Some of these bugs showed evidence of memory corruption under certain circumstances, and we presume that with enough effort at least some of these could be exploited to run arbitrary code. - CVE-2016-1954 (privilege escalation): Security researcher Nicolas Golubovic reported that a malicious page can overwrite files on the user's machine using Content Security Policy (CSP) violation reports. The file contents are restricted to the JSON format of the report. In many cases overwriting a local file may simply be destructive, breaking the functionality of that file. The CSP error reports can include HTML fragments which could be rendered by browsers. If a user has disabled add-on signing and has installed an "unpacked" add-on, a malicious page could overwrite one of the add-on resources. Depending on how this resource is used, this could lead to privilege escalation. In general this flaw cannot be exploited through email in the Thunderbird product because scripting is disabled, but is potentially a risk in browser or browser-like contexts. - CVE-2016-1957 (resource consumption): Security researchers Jose Martinez and Romina Santillan reported a memory leak in the libstagefright library when array destruction occurs during MPEG4 video file processing. In general this flaw cannot be exploited through email in the Thunderbird product because scripting is disabled, but is potentially a risk in browser or browser-like contexts. - CVE-2016-1960 (arbitrary code execution): Security researcher ca0nguyen, working with HP's Zero Day Initiative, reported a use-after-free issue in the HTML5 string parser when parsing a particular set of table-related tags in a foreign fragment context such as SVG. This results in a potentially exploitable crash. In general this flaw cannot be exploited through email in the Thunderbird product because scripting is disabled, but is potentially a risk in browser or browser-like contexts. - CVE-2016-1961 (arbitrary code execution): Security researcher lokihardt, working with HP's Zero Day Initiative, reported a use-after-free issue in the SetBody function of HTMLDocument. This results in a potentially exploitable crash. In general this flaw cannot be exploited through email in the Thunderbird product because scripting is disabled, but is potentially a risk in browser or browser-like contexts. - CVE-2016-1964 (arbitrary code execution): Security researcher Nicolas Grégoire used the Address Sanitizer to find a use-after-free during XML transformation operations. This results in a potentially exploitable crash triggerable by web content. In general this flaw cannot be exploited through email in the Thunderbird product because scripting is disabled, but is potentially a risk in browser or browser-like contexts. - CVE-2016-1966 (remote code execution): The Communications Electronics Security Group (UK) of the GCHQ reported a dangling pointer dereference within the Netscape Plugin Application Programming Interface (NPAPI) that could lead to the NPAPI subsystem crashing. This issue requires a maliciously crafted NPAPI plugin in concert with scripted web content, resulting in a potentially exploitable crash when triggered. In general this flaw cannot be exploited through email in the Thunderbird product because scripting is disabled, but is potentially a risk in browser or browser-like contexts. - CVE-2016-1974 (denial of service): Security researcher Ronald Crane reported an out-of-bounds read following a failed allocation in the HTML parser while working with unicode strings. This can also affect the parsing of XML and SVG format data. This leads to a potentially exploitable crash. In general this flaw cannot be exploited through email in the Thunderbird product because scripting is disabled, but is potentially a risk in browser or browser-like contexts. - CVE-2016-1977 CVE-2016-2790 CVE-2016-2791 CVE-2016-2792 CVE-2016-2793 CVE-2016-2794 CVE-2016-2795 CVE-2016-2796 CVE-2016-2797 CVE-2016-2798 CVE-2016-2799 CVE-2016-2800 CVE-2016-2801 CVE-2016-2802 (buffer overflow): Security researcher Holger Fuhrmannek and Mozilla security engineer Tyson Smith reported a number of security vulnerabilities in the Graphite 2 library affecting version 1.3.5. The issue reported by Holger Fuhrmannek is a mechanism to induce stack corruption with a malicious graphite font. This leads to a potentially exploitable crash when the font is loaded. Tyson Smith used the Address Sanitizer tool in concert with a custom software fuzzer to find a series of uninitialized memory, out-of-bounds read, and out-of-bounds write errors when working with fuzzed graphite fonts. Impact ====== A remote attacker can execute arbitrary code on the affected host. References ========== https://www.mozilla.org/en-US/security/known-vulnerabilities/thunderbird/#t… https://www.mozilla.org/en-US/security/advisories/mfsa2016-16/ https://www.mozilla.org/en-US/security/advisories/mfsa2016-17/ https://www.mozilla.org/en-US/security/advisories/mfsa2016-20/ https://www.mozilla.org/en-US/security/advisories/mfsa2016-23/ https://www.mozilla.org/en-US/security/advisories/mfsa2016-24/ https://www.mozilla.org/en-US/security/advisories/mfsa2016-27/ https://www.mozilla.org/en-US/security/advisories/mfsa2016-31/ https://www.mozilla.org/en-US/security/advisories/mfsa2016-34/ https://www.mozilla.org/en-US/security/advisories/mfsa2016-37/ https://access.redhat.com/security/cve/CVE-2016-1952 https://access.redhat.com/security/cve/CVE-2016-1953 https://access.redhat.com/security/cve/CVE-2016-1954 https://access.redhat.com/security/cve/CVE-2016-1957 https://access.redhat.com/security/cve/CVE-2016-1960 https://access.redhat.com/security/cve/CVE-2016-1961 https://access.redhat.com/security/cve/CVE-2016-1964 https://access.redhat.com/security/cve/CVE-2016-1966 https://access.redhat.com/security/cve/CVE-2016-1974 https://access.redhat.com/security/cve/CVE-2016-1977 https://access.redhat.com/security/cve/CVE-2016-2790 https://access.redhat.com/security/cve/CVE-2016-2791 https://access.redhat.com/security/cve/CVE-2016-2792 https://access.redhat.com/security/cve/CVE-2016-2793 https://access.redhat.com/security/cve/CVE-2016-2794 https://access.redhat.com/security/cve/CVE-2016-2795 https://access.redhat.com/security/cve/CVE-2016-2796 https://access.redhat.com/security/cve/CVE-2016-2797 https://access.redhat.com/security/cve/CVE-2016-2798 https://access.redhat.com/security/cve/CVE-2016-2799 https://access.redhat.com/security/cve/CVE-2016-2800 https://access.redhat.com/security/cve/CVE-2016-2801 https://access.redhat.com/security/cve/CVE-2016-2802

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[arch-security] [ASA-201603-20] git: remote code execution
by Remi Gacogne 20 Mar '16

20 Mar '16

Arch Linux Security Advisory ASA-201603-20 ========================================== Severity: Critical Date : 2016-03-20 CVE-ID : CVE-2016-2324 Package : git Type : remote code execution Remote : Yes Link : https://wiki.archlinux.org/index.php/CVE Summary ======= The package git before version 2.7.4-1 is vulnerable to remote code execution. Resolution ========== Upgrade to 2.7.4-1. # pacman -Syu "git>=2.7.4-1" The problem has been fixed upstream in versions 2.4.11, 2.5.5, 2.6.6 and 2.7.4. Workaround ========== None. Description =========== Laël Cellier discovered an integer overflow vulnerability in the path_name() function of git. Impact ====== A remote attacker can execute arbitrary code by crafting a malicious repository and either directly cloning it or getting a local user to clone it. References ========== http://seclists.org/oss-sec/2016/q1/653 https://access.redhat.com/security/cve/CVE-2016-2324

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[arch-security] [ASA-201603-19] dropbear: command injection
by Levente Polyak 14 Mar '16

14 Mar '16

Arch Linux Security Advisory ASA-201603-19 ========================================== Severity: Medium Date : 2016-03-14 CVE-ID : CVE-2016-3116 Package : dropbear Type : command injection Remote : Yes Link : https://wiki.archlinux.org/index.php/CVE Summary ======= The package dropbear before version 2016.72-1 is vulnerable to command injection leading to information disclosure, directory traversal and possibly other impact. Resolution ========== Upgrade to 2016.72-1. # pacman -Syu "dropbear>=2016.72-1" The problem has been fixed upstream in version 2016.72. Workaround ========== Set X11Forwarding=no in sshd_config. This is the default. For authorized_keys that specify a "command" restriction, also set the "restrict" or "no-x11-forwarding" restrictions. Description =========== A vulnerability was found in a way dropbear processed X11 forwarding input. By using a specially crafted request, an attacker could bypass the authorized_keys command restrictions. xauth is run under the user's privilege, so this vulnerability offers no additional access to unrestricted accounts, but could circumvent key or account restrictions such as sshd_config ForceCommand, authorized_keys command="..." or restricted shells. Impact ====== A remote authenticated user who is able to request X11 forwarding can inject commands leading to information disclosure, directory traversal and possibly other impact. References ========== https://matt.ucc.asn.au/dropbear/CHANGES https://access.redhat.com/security/cve/CVE-2016-3116

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[arch-security] [ASA-201603-18] pcre: arbitrary code execution
by Levente Polyak 13 Mar '16

13 Mar '16

Arch Linux Security Advisory ASA-201603-18 ========================================== Severity: High Date : 2016-03-13 CVE-ID : CVE-2016-1283 Package : pcre Type : arbitrary code execution Remote : Yes Link : https://wiki.archlinux.org/index.php/CVE Summary ======= The package pcre before version 8.38-3 is vulnerable to arbitrary code execution. Resolution ========== Upgrade to 8.38-3. # pacman -Syu "pcre>=8.38-3" The problem has been fixed upstream but no release is available yet. Workaround ========== None. Description =========== PCRE library is prone to a vulnerability which leads to Heap Overflow. During the compilation of a malformed regular expression, more data is written on the malloced block than the expected size output by compile_regex. Exploits with advanced Heap Fengshui techniques may allow an attacker to execute arbitrary code in the context of the user running the affected application. Impact ====== A remote attacker is able to execute arbitrary code by crafting a special regular expression that triggers a heap buffer overflow. References ========== https://access.redhat.com/security/cve/CVE-2016-1283 https://bugs.exim.org/show_bug.cgi?id=1767 https://bugs.archlinux.org/48484

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