April 2015 - Arch-security - lists.archlinux.org

[arch-security] [ASA-201504-8] ntp: multiple issues
by Christian Rebischke 08 Apr '15

08 Apr '15

Arch Linux Security Advisory ASA-201504-8 ========================================= Severity: Medium Date : 2015-04-08 CVE-ID : CVE-2015-1798 CVE-2015-1799 Package : ntp Type : multiple issues Remote : Yes Link : https://wiki.archlinux.org/index.php/CVE Summary ======= The package ntp before version 4.2.8p2-1 is vulnerable to multiple issues. Resolution ========== Upgrade to 4.2.8p2-1. # pacman -Syu "ntp>=4.2.8p2-1" The problems have been fixed upstream. Workaround ========== None. Description =========== CVE-2015-1798 (accept unauthenticated packets): When ntpd is configured to use a symmetric key to authenticate a remote NTP server/peer, it checks if the NTP message authentication code (MAC) in received packets is valid, but not if there actually is any MAC included. Packets without a MAC are accepted as if they had a valid MAC. This allows a MITM attacker to send false packets that are accepted by the client/peer without having to know the symmetric key. The attacker needs to know the transmit timestamp of the client to match it in the forged reply and the false reply needs to reach the client before the genuine reply from the server. The attacker doesn't necessarily need to be relaying the packets between the client and the server. CVE-2015-1799 (denial of service): An attacker knowing that NTP hosts A and B are peering with each other (symmetric association) can send a packet to host A with source address of B which will set the NTP state variables on A to the values sent by the attacker. Host A will then send on its next poll to B a packet with originate timestamp that doesn't match the transmit timestamp of B and the packet will be dropped. If the attacker does this periodically for both hosts, they won't be able to synchronize to each other. This is a known denial-of-service attack Impact ====== CVE-2015-1798 (accept unauthenticated packets): A MITM attacker could send false packets. These packets could be being accepte without knowing the symmetric key. CVE-2015-1799 (denial of service): An attacker could stop the synchronizing process of ntp. References ========== http://support.ntp.org/bin/view/Main/SecurityNotice#Recent_Vulnerabilities https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-1798 https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-1799

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[arch-security] [ASA-201504-7] tor: multiple issues
by chris.rebischke＠gmail.com 07 Apr '15

07 Apr '15

Arch Linux Security Advisory ASA-201504-7 ========================================= Severity: high Date : 2015-04-07 CVE-ID : CVE-2015-2928 CVE-2015-2929 Package : tor Type : multiple issues Remote : yes Link : https://wiki.archlinux.org/index.php/CVE Summary ======= The package tor before version 0.2.5.12-1 is vulnerable against multiple issues. Resolution ========== Upgrade to 0.2.5.12-1 # pacman -Syu "tor>=0.2.5.12-1" The problem has been fixed upstream in version 0.2.5.12. Workaround ========== None. Description =========== CVE-2015-2928 "disgleirio" discovered that a malicious client could trigger an assertion failure in a Tor instance providing a hidden service, thus rendering the service inaccessible. CVE-2015-2929 "DonnchaC" discovered that Tor clients would crash with an assertion failure upon parsing specially crafted hidden service descriptors. Impact ====== An attacker could crash a Tor client or could make a Tor service inaccessible. References ========== https://trac.torproject.org/projects/tor/ticket/15600 https://trac.torproject.org/projects/tor/ticket/15601 http://seclists.org/oss-sec/2015/q2/56

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[arch-security] [ASA-201504-5] java-batik: xml external entity injection
by Levente Polyak 04 Apr '15

04 Apr '15

Arch Linux Security Advisory ASA-201504-5 ========================================= Severity: Medium Date : 2015-04-04 CVE-ID : CVE-2015-0250 Package : java-batik Type : xml external entity injection Remote : Yes Link : https://wiki.archlinux.org/index.php/CVE Summary ======= The package java-batik before version 1.8-1 is vulnerable to xml external entity injection. Resolution ========== Upgrade to 1.8-1. # pacman -Syu "java-batik>=1.8-1" The problem has been fixed upstream in version 1.8. Workaround ========== None. Description =========== Batik offers several classes for SVG to PNG/JPG conversion, which suffer from a XML External Entity Injection due to the evaluation of external entities within the given SVG file. If an application offers the possibility to upload a SVG file an attacker can put in a malicious formed file and retrieve sensitive information such as the content of files of the respective server. The type of file that can be retrieved depends on the user context in which the application is running. Impact ====== A remote attacker is able to use a specially crafted SVG file to read arbitrary files or cause a denial of service. References ========== http://seclists.org/fulldisclosure/2015/Mar/142 https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-0250 https://bugs.archlinux.org/task/44410

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[arch-security] [ASA-201504-6] thunderbird: multiple issues
by Remi Gacogne 04 Apr '15

04 Apr '15

Arch Linux Security Advisory ASA-201504-6 ========================================= Severity: Critical Date : 2015-04-04 CVE-ID : CVE-2015-0801 CVE-2015-0807 CVE-2015-0813 CVE-2015-0815 CVE-2015-0816 Package : thunderbird Type : multiple issues Remote : Yes Link : https://wiki.archlinux.org/index.php/CVE Summary ======= The package thunderbird before version 31.6.0-1 is vulnerable to multiple issues. Resolution ========== Upgrade to 31.6.0-1. # pacman -Syu "thunderbird>=31.6.0-1" The problem has been fixed upstream in version 31.6.0. Workaround ========== In general these flaws cannot be exploited through email in the Thunderbird product because scripting is disabled, but are potentially a risk in browser or browser-like contexts. Description =========== - CVE-2015-0801 (same-origin bypass): Mozilla developer Olli Pettay reported that while investigating Mozilla Foundation Security Advisory 2015-28, he and Mozilla developer Boris Zbarsky found an alternate way to trigger a similar vulnerability. The previously reported flaw used an issue with SVG content navigation to bypass same-origin policy protections to run scripts in a privileged context. This newer variant found that the same flaw could be used during anchor navigation of a page, allowing bypassing of same-origin policy protections. - CVE-2015-0807 (CORS requests should not follow 30x redirections after preflight): Mozilla developer Christoph Kerschbaumer discovered an issue while investigating Mozilla Foundation Security Advisory 2015-03, previously reported by security researcher Muneaki Nishimura. This flaw was that a cross-origin resource sharing (CORS) request should not follow 30x redirections after preflight according to the specification. This only affects sendBeacon() requests but could allow for a potential Cross-site request forgery (XSRF) attack from malicious websites. - CVE-2015-0813 (use-after-free): Security researcher Aki Helin reported a use-after-free when playing certain MP3 format audio files on the web using the Fluendo MP3 plugin for GStreamer on Linux. This is due to a flaw in handling certain MP3 files by the plugin and its interaction with Mozilla code. This can lead to a potentially exploitable crash. - CVE-2015-0815 (memory safety issues): Mozilla developers and community identified and 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-2015-0816 (privilege escalation): Security researcher Mariusz Mlynski reported, through HP Zero Day Initiative's Pwn2Own contest, that documents loaded though a resource: URL, such as Mozilla's PDF.js PDF file viewer, were able to subsequently load privileged chrome pages. The privilege restrictions on resource: URLs was handled incorrectly and these restrictions could be bypassed if this flaw was combined with a separate vulnerability allowing for same-origin policy violation, it could be used to run arbitrary code. Impact ====== A remote attacker may be able to execute arbitrary code. References ========== https://www.mozilla.org/en-US/security/advisories/mfsa2015-30/ https://www.mozilla.org/en-US/security/advisories/mfsa2015-31/ https://www.mozilla.org/en-US/security/advisories/mfsa2015-33/ https://www.mozilla.org/en-US/security/advisories/mfsa2015-37/ https://www.mozilla.org/en-US/security/advisories/mfsa2015-40/ https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-0801 https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-0807 https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-0813 https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-0815 https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-0816

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[arch-security] [ASA-201504-4] firefox: certificate verification bypass
by Remi Gacogne 04 Apr '15

04 Apr '15

Arch Linux Security Advisory ASA-201504-4 ========================================= Severity: Critical Date : 2015-04-04 CVE-ID : CVE-2015-0799 Package : firefox Type : certificate verification bypass Remote : Yes Link : https://wiki.archlinux.org/index.php/CVE Summary ======= The package firefox before version 37.0.1-1 is vulnerable to certificate verification bypass. Resolution ========== Upgrade to 37.0.1-1. # pacman -Syu "firefox>=37.0.1-1" The problem has been fixed upstream in version 37.0.1. Workaround ========== None. Description =========== Security researcher Muneaki Nishimura discovered a flaw in the Mozilla's HTTP Alternative Services implementation. If an Alt-Svc header is specified in the HTTP/2 response, SSL certificate verification can be bypassed for the specified alternate server. As a result of this, warnings of invalid SSL certificates will not be displayed and an attacker could potentially impersonate another site through a man-in-the-middle (MTIM), replacing the original certificate with their own. Impact ====== A remote attacker in position of man-in-the-middle can impersonate another site, bypassing certificate validation. References ========== https://www.mozilla.org/en-US/security/advisories/mfsa2015-44/ https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-0799

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[arch-security] [ASA-201504-3] libtasn1: stack overflow
by Remi Gacogne 03 Apr '15

03 Apr '15

Arch Linux Security Advisory ASA-201504-3 ========================================= Severity: Low Date : 2015-04-03 CVE-ID : CVE-2015-2806 Package : libtasn1 Type : stack overflow Remote : No Link : https://wiki.archlinux.org/index.php/CVE Summary ======= The package libtasn1 before version 4.4-1 is vulnerable to a two-byte stack overflow in DER decoding. Resolution ========== Upgrade to 4.4-1. # pacman -Syu "libtasn1>=4.4-1" The problem has been fixed upstream in version 4.4. Workaround ========== None. Description =========== A two-byte stack overflow has been found in the ASN.1 DER decoding logic of libtasn1. Impact ====== An attacker may be able to crash a program using libtasn1 by submitting a crafted X.509 structure to the program. References ========== https://access.redhat.com/security/cve/CVE-2015-2806 https://lists.gnu.org/archive/html/help-libtasn1/2015-03/msg00002.html http://git.savannah.gnu.org/gitweb/?p=libtasn1.git;a=commitdiff;h=4d4f99282…

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[arch-security] [ASA-201504-2] chromium: remote code execution
by Remi Gacogne 02 Apr '15

02 Apr '15

Arch Linux Security Advisory ASA-201504-2 ========================================= Severity: Critical Date : 2015-04-02 CVE-ID : CVE-2015-1233 CVE-2015-1234 Package : chromium Type : remote code execution Remote : Yes Link : https://wiki.archlinux.org/index.php/CVE Summary ======= The package chromium before version 41.0.2272.118-1 is vulnerable to remote code execution. Resolution ========== Upgrade to 41.0.2272.118-1. # pacman -Syu "chromium>=41.0.2272.118-1" The problem has been fixed upstream in version 41.0.2272.118. Workaround ========== None. Description =========== - CVE-2015-1233 (remote code execution): A combination of V8, Gamepad and IPC bugs can lead to remote code execution outside of the sandbox. - CVE-2015-1234 (buffer overflow): Buffer overflow via a race condition in GPU. Impact ====== A remote attacker can execute arbitrary code on a vulnerable host, bypassing the sandboxing protection. References ========== https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-1233 https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-1234 http://googlechromereleases.blogspot.fr/2015/04/stable-channel-update.html https://code.google.com/p/chromium/issues/detail?id=468936 https://code.google.com/p/chromium/issues/detail?id=469058 https://codereview.chromium.org/1016193003

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[arch-security] [ASA-201504-1] firefox: multiple issues
by Levente Polyak 01 Apr '15

01 Apr '15

Arch Linux Security Advisory ASA-201504-1 ========================================= Severity: Critical Date : 2015-04-01 CVE-ID : CVE-2015-0801 CVE-2015-0802 CVE-2015-0803 CVE-2015-0804 CVE-2015-0805 CVE-2015-0806 CVE-2015-0807 CVE-2015-0808 CVE-2015-0811 CVE-2015-0812 CVE-2015-0813 CVE-2015-0814 CVE-2015-0815 CVE-2015-0816 Package : firefox Type : multiple issues Remote : Yes Link : https://wiki.archlinux.org/index.php/CVE Summary ======= The package firefox before version 37.0-1 is vulnerable to multiple issues including but not limited to arbitrary code execution, same-origin bypass, information disclosure, cross-site request forgery and denial of service. Resolution ========== Upgrade to 37.0-1. # pacman -Syu "firefox>=37.0-1" The problems have been fixed upstream in version 37.0. Workaround ========== None. Description =========== - CVE-2015-0801 (same-origin bypass) Mozilla developer Olli Pettay reported that while investigating Mozilla Foundation Security Advisory 2015-28, he and Mozilla developer Boris Zbarsky found an alternate way to trigger a similar vulnerability. The previously reported flaw used an issue with SVG content navigation to bypass same-origin policy protections to run scripts in a privileged context. This newer variant found that the same flaw could be used during anchor navigation of a page, allowing bypassing of same-origin policy protections. - CVE-2015-0802 (privilege boundary violation) Mozilla developer Bobby Holley reported that windows created to hold privileged UI content retained access to privileged internal methods if later navigated to unprivileged content. If a separate flaw was found that allowed for web content to reference these privileged windows, an attacker could use this reference to navigate them to their own content allowing for an escalation of privilege and arbitrary code execution. On its own, this flaw does not allow for privilege escalation by web content. - CVE-2015-0803 (use-after-free) Security researcher Nils used the Address Sanitizer tool to discover two type confusion flaws. The first of these occurs while setting specific attributes of a source element resulting in incorrect object casting. The second flaw occurs when binding a source to a tree when the function fails to validate the namespace. These flaws lead to use-after-free errors, resulting in potentially exploitable crashes. - CVE-2015-0804 (use-after-free) Security researcher Nils used the Address Sanitizer tool to discover two type confusion flaws. The first of these occurs while setting specific attributes of a source element resulting in incorrect object casting. The second flaw occurs when binding a source to a tree when the function fails to validate the namespace. These flaws lead to use-after-free errors, resulting in potentially exploitable crashes. - CVE-2015-0805 (memory corruption) Security researcher Abhishek Arya (Inferno) of the Google Chrome Security Team used the Address Sanitizer tool to discover two memory corruption crashes during 2D graphics rendering due to problems in Off Main Thread Compositing. These crashes are potentially exploitable. - CVE-2015-0806 (memory corruption) Security researcher Abhishek Arya (Inferno) of the Google Chrome Security Team used the Address Sanitizer tool to discover two memory corruption crashes during 2D graphics rendering due to problems in Off Main Thread Compositing. These crashes are potentially exploitable. - CVE-2015-0807 (cross-site request forgery) A flaw was found in the Beacon interface implementation in Firefox. A web page containing malicious content could allow a remote attacker to conduct a Cross-Site Request Forgery (CSRF) attack. - CVE-2015-0808 (mismatched free) Security researcher Mitchell Harper used Valgrind to discover incorrect memory management for simple-type arrays in WebRTC. This was undefined behavior which is theoretically dangerous but was determined to be safe in this instance. - CVE-2015-0811 (information disclosure) Security researcher Felix Gröbert of Google used the Address Sanitizer tool to discover an out of bounds read in the QCMS color management library while transforming images with certain parameters. This could lead to information disclosure. - CVE-2015-0812 (approval bypass) Security researcher Armin Razmdjou discovered that a man-in-the-middle (MITM) attacker spoofing a Mozilla sub-domain could bypass user approval messages to install a Firefox lightweight theme. This was possible because add-on installations of the lightweight themes do not require the use of HTTP over SSL. Firefox extensions were not directly affected and still required user approval for installation. - CVE-2015-0813 (use-after-free) Security researcher Aki Helin reported a use-after-free when playing certain MP3 format audio files on the web using the Fluendo MP3 plugin for GStreamer on Linux. This is due to a flaw in handling certain MP3 files by the plugin and its interaction with Mozilla code. This can lead to a potentially exploitable crash. - CVE-2015-0814 (arbitrary code execution) Mozilla developers and community identified and 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-2015-0815 (arbitrary code execution) Mozilla developers and community identified and 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-2015-0816 (arbitrary code execution) Security researcher Mariusz Mlynski reported, through HP Zero Day Initiative's Pwn2Own contest, that documents loaded though a resource: URL, such as Mozilla's PDF.js PDF file viewer, were able to subsequently load privileged chrome pages. The privilege restrictions on resource: URLs was handled incorrectly and these restrictions could be bypassed if this flaw was combined with a separate vulnerability allowing for same-origin policy violation, it could be used to run arbitrary code. Impact ====== A remote attacker is able to execute arbitrary code, bypass the same-origin policy, conduct cross-site request forgery, take advantage of information disclosure, perform denial of service or possibly have other impact via various vectors. References ========== https://www.mozilla.org/en-US/security/advisories/mfsa2015-30/ https://www.mozilla.org/en-US/security/advisories/mfsa2015-31/ https://www.mozilla.org/en-US/security/advisories/mfsa2015-32/ https://www.mozilla.org/en-US/security/advisories/mfsa2015-33/ https://www.mozilla.org/en-US/security/advisories/mfsa2015-34/ https://www.mozilla.org/en-US/security/advisories/mfsa2015-36/ https://www.mozilla.org/en-US/security/advisories/mfsa2015-38/ https://www.mozilla.org/en-US/security/advisories/mfsa2015-39/ https://www.mozilla.org/en-US/security/advisories/mfsa2015-40/ https://www.mozilla.org/en-US/security/advisories/mfsa2015-42/ https://access.redhat.com/security/cve/CVE-2015-0801 https://security-tracker.debian.org/tracker/CVE-2015-0802 https://security-tracker.debian.org/tracker/CVE-2015-0803 https://security-tracker.debian.org/tracker/CVE-2015-0804 https://security-tracker.debian.org/tracker/CVE-2015-0805 https://security-tracker.debian.org/tracker/CVE-2015-0806 https://access.redhat.com/security/cve/CVE-2015-0807 https://security-tracker.debian.org/tracker/CVE-2015-0808 https://security-tracker.debian.org/tracker/CVE-2015-0811 https://security-tracker.debian.org/tracker/CVE-2015-0812 https://security-tracker.debian.org/tracker/CVE-2015-0813 https://security-tracker.debian.org/tracker/CVE-2015-0814 https://access.redhat.com/security/cve/CVE-2015-0815 https://access.redhat.com/security/cve/CVE-2015-0816

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