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

[arch-security] [ASA-201601-14] hub: information leakage
by Levente Polyak 17 Jan '16

17 Jan '16

Arch Linux Security Advisory ASA-201601-14 ========================================== Severity: High Date : 2016-01-17 CVE-ID : CVE-2015-8618 Package : hub Type : information leakage Remote : Yes Link : https://wiki.archlinux.org/index.php/CVE Summary ======= The package hub before version 2.2.2-2 is vulnerable to information leakage. Resolution ========== Upgrade to 2.2.2-2. # pacman -Syu "hub>=2.2.2-2" The problem has been fixed upstream in go version 1.5.3. Workaround ========== None. Description =========== This issue can affect RSA computations in crypto/rsa, which is used by crypto/tls. TLS servers on 32-bit systems could plausibly leak their RSA private key due to this issue. Other protocol implementations that create many RSA signatures could also be impacted in the same way. Specifically, incorrect results in one part of the RSA Chinese Remainder computation can cause the result to be incorrect in such a way that it leaks one of the primes. While RSA blinding should prevent an attacker from crafting specific inputs that trigger the bug, on 32-bit systems the bug can be expected to occur at random around one in 2^26 times. Thus collecting around 64 million signatures (of known data) from an affected server should be enough to extract the private key used. On 64-bit systems, the frequency of the bug is so low (less than one in 2^50) that it would be very difficult to exploit. Nonetheless, everyone is strongly encouraged to upgrade. Impact ====== A remote unauthenticated attacker can extract a private RSA key by passively collecting signatures. References ========== https://access.redhat.com/security/cve/CVE-2015-8618 https://groups.google.com/forum/#!topic/golang-dev/MEATuOi_ei4 https://lists.archlinux.org/pipermail/arch-security/2016-January/000516.html

1 0

[arch-security] [ASA-201601-13] go-ipfs: information leakage
by Levente Polyak 17 Jan '16

17 Jan '16

Arch Linux Security Advisory ASA-201601-13 ========================================== Severity: High Date : 2016-01-17 CVE-ID : CVE-2015-8618 Package : go-ipfs Type : information leakage Remote : Yes Link : https://wiki.archlinux.org/index.php/CVE Summary ======= The package go-ipfs before version 0.3.11-2 is vulnerable to information leakage. Resolution ========== Upgrade to 0.3.11-2. # pacman -Syu "go-ipfs>=0.3.11-2" The problem has been fixed upstream in go version 1.5.3. Workaround ========== None. Description =========== This issue can affect RSA computations in crypto/rsa, which is used by crypto/tls. TLS servers on 32-bit systems could plausibly leak their RSA private key due to this issue. Other protocol implementations that create many RSA signatures could also be impacted in the same way. Specifically, incorrect results in one part of the RSA Chinese Remainder computation can cause the result to be incorrect in such a way that it leaks one of the primes. While RSA blinding should prevent an attacker from crafting specific inputs that trigger the bug, on 32-bit systems the bug can be expected to occur at random around one in 2^26 times. Thus collecting around 64 million signatures (of known data) from an affected server should be enough to extract the private key used. On 64-bit systems, the frequency of the bug is so low (less than one in 2^50) that it would be very difficult to exploit. Nonetheless, everyone is strongly encouraged to upgrade. Impact ====== A remote unauthenticated attacker can extract a private RSA key by passively collecting signatures. References ========== https://access.redhat.com/security/cve/CVE-2015-8618 https://groups.google.com/forum/#!topic/golang-dev/MEATuOi_ei4 https://lists.archlinux.org/pipermail/arch-security/2016-January/000516.html

1 0

[arch-security] [ASA-201601-12] docker: information leakage
by Levente Polyak 17 Jan '16

17 Jan '16

Arch Linux Security Advisory ASA-201601-12 ========================================== Severity: High Date : 2016-01-17 CVE-ID : CVE-2015-8618 Package : docker Type : information leakage Remote : Yes Link : https://wiki.archlinux.org/index.php/CVE Summary ======= The package docker before version 1:1.9.1-2 is vulnerable to information leakage. Resolution ========== Upgrade to 1:1.9.1-2. # pacman -Syu "docker>=1:1.9.1-2" The problem has been fixed upstream in go version 1.5.3. Workaround ========== None. Description =========== This issue can affect RSA computations in crypto/rsa, which is used by crypto/tls. TLS servers on 32-bit systems could plausibly leak their RSA private key due to this issue. Other protocol implementations that create many RSA signatures could also be impacted in the same way. Specifically, incorrect results in one part of the RSA Chinese Remainder computation can cause the result to be incorrect in such a way that it leaks one of the primes. While RSA blinding should prevent an attacker from crafting specific inputs that trigger the bug, on 32-bit systems the bug can be expected to occur at random around one in 2^26 times. Thus collecting around 64 million signatures (of known data) from an affected server should be enough to extract the private key used. On 64-bit systems, the frequency of the bug is so low (less than one in 2^50) that it would be very difficult to exploit. Nonetheless, everyone is strongly encouraged to upgrade. Impact ====== A remote unauthenticated attacker can extract a private RSA key by passively collecting signatures. References ========== https://access.redhat.com/security/cve/CVE-2015-8618 https://groups.google.com/forum/#!topic/golang-dev/MEATuOi_ei4 https://lists.archlinux.org/pipermail/arch-security/2016-January/000516.html

1 0

[arch-security] [ASA-201601-11] go: information leakage
by Remi Gacogne 16 Jan '16

16 Jan '16

Arch Linux Security Advisory ASA-201601-11 ========================================== Severity: High Date : 2016-01-16 CVE-ID : CVE-2015-8618 Package : go Type : information leakage Remote : Yes Link : https://wiki.archlinux.org/index.php/CVE Summary ======= The package go before version 2:1.5.3-1 is vulnerable to information leakage. Please note that Go programs doing RSA computations must be recompiled with Go 1.5.3 in order to receive the fix. We are currently rebuilding several Arch packages concerned by this issue. Resolution ========== Upgrade to 2:1.5.3-1. # pacman -Syu "go>=2:1.5.3-1" The problem has been fixed upstream in version 1.5.3. Workaround ========== None. Description =========== This issue can affect RSA computations in crypto/rsa, which is used by crypto/tls. TLS servers on 32-bit systems could plausibly leak their RSA private key due to this issue. Other protocol implementations that create many RSA signatures could also be impacted in the same way. Specifically, incorrect results in one part of the RSA Chinese Remainder computation can cause the result to be incorrect in such a way that it leaks one of the primes. While RSA blinding should prevent an attacker from crafting specific inputs that trigger the bug, on 32-bit systems the bug can be expected to occur at random around one in 2^26 times. Thus collecting around 64 million signatures (of known data) from an affected server should be enough to extract the private key used. On 64-bit systems, the frequency of the bug is so low (less than one in 2^50) that it would be very difficult to exploit. Nonetheless, everyone is strongly encouraged to upgrade. Impact ====== A remote unauthenticated attacker can extract a private RSA key by passively collecting signatures. References ========== https://access.redhat.com/security/cve/CVE-2015-8618 https://groups.google.com/forum/#!topic/golang-dev/MEATuOi_ei4

1 0

[arch-security] [ASA-201601-10] php: multiple issues
by Levente Polyak 14 Jan '16

14 Jan '16

Arch Linux Security Advisory ASA-201601-10 ========================================== Severity: Medium Date : 2016-01-14 CVE-ID : CVE-2016-1903 CVE-2016-1904 Package : php Type : multiple issues Remote : Yes Link : https://wiki.archlinux.org/index.php/CVE Summary ======= The package php before version 7.0.2-1 is vulnerable to multiple issues including information disclosure and heap buffer overflow that is leading to denial of service or possibly arbitrary code execution. Resolution ========== Upgrade to 7.0.2-1. # pacman -Syu "php>=7.0.2-1" The problems have been fixed upstream in version 7.0.2. Workaround ========== None. Description =========== - CVE-2016-1903 (information disclosure) An out-of-bounds vulnerability has been discovered in ext/gd/libgd/gd_interpolation.c in the gdImageRotateInterpolated function. The background color of an image is passed in as an integer that represents an index to the color palette. As there is a lack of validation of that parameter, one can pass in a large number that exceeds the color palette array. This reads memory beyond the color palette. Information of the memory leak can then be obtained via the background color after the image has been rotated. - CVE-2016-1904 (arbitrary code execution) A not further specified integer overflow vulnerability has been discovered in ext/standard/exec.c (in the php_escape_shell_cmd function and the php_escape_shell_arg function). This issue results in a heap buffer overflow that is leading to a denial of service or possibly arbitrary code execution. Impact ====== A remote attacker is able to disclose information via a memory leak, perform a denial of service attack or possibly execute arbitrary code. References ========== http://seclists.org/oss-sec/2016/q1/100 https://secure.php.net/ChangeLog-7.php#7.0.2 https://bugs.php.net/bug.php?id=70976 https://github.com/php/php-src/commit/2871c70efaaaa0f

1 0

[arch-security] Suddenly being unsubscribed from all Archlinux mailing list
by Saren Arterius 14 Jan '16

14 Jan '16

Did that happen to all of us, or I just have been trolled? - Saren

3 2

[arch-security] [ASA-201601-9] openssh: multiple issues
by Levente Polyak 14 Jan '16

14 Jan '16

Arch Linux Security Advisory ASA-201601-9 ========================================= Severity: High Date : 2016-01-14 CVE-ID : CVE-2016-0777 CVE-2016-0778 Package : openssh Type : multiple issues Remote : Yes Link : https://wiki.archlinux.org/index.php/CVE Summary ======= The package openssh before version 7.1p2-1 is vulnerable to multiple issues including information disclosure (including the client's private keys) and arbitrary code execution. Resolution ========== Upgrade to 7.1p2-1. # pacman -Syu "openssh>=7.1p2-1" The problems have been fixed upstream in version 7.1p2. Workaround ========== It is possible to mitigate this issue by setting the following option in the OpenSSH client's configuration file manually, either global (/etc/ssh/ssh_config) or user specific (~/.ssh/config): UseRoaming no The above directive should be placed in the Host * section of the configuration file to use this setting for all SSH servers the client connects to. You can also set the option via a command line argument when connecting to an SSH server: -o 'UseRoaming no' Using one of those configuration values mitigates the problems by disabling the roaming feature. Description =========== - CVE-2016-0777 (information disclosure) An information leak flaw was found in the way the OpenSSH client roaming feature was implemented. A malicious server could potentially use this flaw to leak portions of memory (possibly including private SSH keys) of a successfully authenticated OpenSSH client. - CVE-2016-0778 (arbitrary code execution) A buffer overflow flaw was found in the way the OpenSSH client roaming feature was implemented that is leading to a file descriptor leak. A malicious server could potentially use this flaw to execute arbitrary code on a successfully authenticated OpenSSH client if that client used certain non-default configuration options (ProxyCommand, ForwardAgent or ForwardX11). Impact ====== A remote attacker is able to use a malicious server to leak client memory, including the client's private keys or, under certain non default circumstances, execute arbitrary code. Users with passphrase-less privates keys, especially in non interactive setups (automated jobs using ssh, scp, rsync+ssh etc.) are advised to update their keys if they have connected to an SSH server they don't fully trust. References ========== https://lists.mindrot.org/pipermail/openssh-unix-dev/2016-January/034680.ht… https://access.redhat.com/security/cve/CVE-2016-0777 https://access.redhat.com/security/cve/CVE-2016-0778

1 0

[arch-security] openssh: workaround for critical vulnerability
by Levente Polyak 14 Jan '16

14 Jan '16

Summary ======= A critical client side SSH vulnerability has been discovered and a patched upstream version is released as 7.1p2. We strongly advise to use the following workaround until the upcoming release is rolled out in Arch Linux. This vulnerability is being tracked as CVE-2016-0777. Workaround ========== Add undocumented "UseRoaming no" to ssh_config or use "-oUseRoaming=no" work around the issue. References ========== https://lists.mindrot.org/pipermail/openssh-unix-dev/2016-January/034680.ht… https://www.marc.info/?l=openbsd-tech&m=145278077820529 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-0777

1 1

[arch-security] [ASA-201601-8] libxslt: denial of service
by Levente Polyak 13 Jan '16

13 Jan '16

Arch Linux Security Advisory ASA-201601-8 ========================================= Severity: Medium Date : 2016-01-13 CVE-ID : CVE-2015-7995 Package : libxslt Type : denial of service Remote : Yes Link : https://wiki.archlinux.org/index.php/CVE Summary ======= The package libxslt before version 1.1.28-4 is vulnerable to denial of service. Resolution ========== Upgrade to 1.1.28-4. # pacman -Syu "libxslt>=1.1.28-4" The problem has been fixed upstream but no release is available yet. Workaround ========== None. Description =========== A type confusion vulnerability was discovered in the xsltStylePreCompute() function of libxslt. A remote attacker could possibly exploit this flaw to cause an application using libxslt to crash by tricking the application into processing a specially crafted XSLT document. Impact ====== A remote attacker is able to create a specially crafted XSLT document that, when processed, is leading to an application crash resulting in denial of service. References ========== https://access.redhat.com/security/cve/CVE-2015-7995 https://git.gnome.org/browse/libxslt/commit/?id=7ca19df89 https://bugzilla.redhat.com/show_bug.cgi?id=1257962 https://bugs.archlinux.org/task/47681

1 0

[arch-security] [ASA-201601-7] dhcpcd: denial of service
by Levente Polyak 11 Jan '16

11 Jan '16

Arch Linux Security Advisory ASA-201601-7 ========================================= Severity: Medium Date : 2016-01-11 CVE-ID : CVE-2016-1503 CVE-2016-1504 Package : dhcpcd Type : denial of service Remote : Yes Link : https://wiki.archlinux.org/index.php/CVE Summary ======= The package dhcpcd before version 6.10.0-1 is vulnerable to denial of service. Resolution ========== Upgrade to 6.10.0-1. # pacman -Syu "dhcpcd>=6.10.0-1" The problem has been fixed upstream in version 6.10.0. Workaround ========== None. Description =========== - CVE-2016-1503 (denial of service) An issue has been discovered that can lead to a heap overflow via malformed dhcp responses later in print_option (via dhcp_envoption1) due to incorrect option length values. - CVE-2016-1504 (denial of service) A malformed dhcp response can lead to an invalid read/crash leading to denial of service. Impact ====== A remote attacker is able to send specially crafted packets leading to application crash resulting in denial of service. References ========== https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1503 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1504 http://article.gmane.org/gmane.comp.security.oss.general/18516

1 0