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CVE-2015-1781

Status Candidate

Overview

Buffer overflow in the gethostbyname_r and other unspecified NSS functions in the GNU C Library (aka glibc or libc6) before 2.22 allows context-dependent attackers to cause a denial of service (crash) or execute arbitrary code via a crafted DNS response, which triggers a call with a misaligned buffer.

Related Files

Ubuntu Security Notice USN-2985-2
Posted May 26, 2016
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2985-2 - USN-2985-1 fixed vulnerabilities in the GNU C Library. The fix for CVE-2014-9761 introduced a regression which affected applications that use the libm library but were not fully restarted after the upgrade. This update removes the fix for CVE-2014-9761 and a future update will be provided to address this issue. Various other issues were also addressed.

tags | advisory, vulnerability
systems | linux, ubuntu
advisories | CVE-2014-8121, CVE-2014-9761, CVE-2015-1781, CVE-2015-5277, CVE-2015-8776, CVE-2015-8777, CVE-2015-8778, CVE-2015-8779, CVE-2016-3075
SHA-256 | 2a6f679b626f83a064fc3dc159f612a216d5445b2d132256da0fb78b6542247d
Gentoo Linux Security Advisory 201602-02
Posted Feb 17, 2016
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 201602-2 - Multiple vulnerabilities have been found in the GNU C library, the worst allowing for remote execution of arbitrary code. Versions less than 2.21-r2 are affected.

tags | advisory, remote, arbitrary, vulnerability
systems | linux, gentoo
advisories | CVE-2013-7423, CVE-2014-0475, CVE-2014-5119, CVE-2014-6040, CVE-2014-7817, CVE-2014-8121, CVE-2014-9402, CVE-2015-1472, CVE-2015-1781, CVE-2015-7547, CVE-2015-8776, CVE-2015-8778, CVE-2015-8779
SHA-256 | 7fb31d7914b4d8d365ed0e55052ae4ab9788d37ba1146e4a9261c90a46a215e4
Debian Security Advisory 3480-1
Posted Feb 16, 2016
Authored by Debian | Site debian.org

Debian Linux Security Advisory 3480-1 - Several vulnerabilities have been fixed in the GNU C Library, eglibc.

tags | advisory, vulnerability
systems | linux, debian
advisories | CVE-2014-8121, CVE-2015-1781, CVE-2015-7547, CVE-2015-8776, CVE-2015-8777, CVE-2015-8778, CVE-2015-8779
SHA-256 | f21bc37873b6d3f878293b24b50bceadf6e2f468ced587d39dcdaea3989a7fc3
Red Hat Security Advisory 2015-2589-01
Posted Dec 9, 2015
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2015-2589-01 - The glibc packages provide the standard C libraries, POSIX thread libraries, standard math libraries, and the Name Server Caching Daemon used by multiple programs on the system. Without these libraries, the Linux system cannot function correctly. It was discovered that the nss_files backend for the Name Service Switch in glibc would return incorrect data to applications or corrupt the heap. A local attacker could potentially use this flaw to execute arbitrary code on the system. It was discovered that, under certain circumstances, glibc's getaddrinfo() function would send DNS queries to random file descriptors. An attacker could potentially use this flaw to send DNS queries to unintended recipients, resulting in information disclosure or data loss due to the application encountering corrupted data.

tags | advisory, arbitrary, local, info disclosure
systems | linux, redhat, osx
advisories | CVE-2013-7423, CVE-2015-1472, CVE-2015-1473, CVE-2015-1781, CVE-2015-5277
SHA-256 | 500d94725a7bca027910198d11bcaf63c36b7385c61ae995036c7436f222d112
Red Hat Security Advisory 2015-2199-07
Posted Nov 20, 2015
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2015-2199-07 - The glibc packages provide the standard C libraries, POSIX thread libraries, standard math libraries, and the Name Server Caching Daemon used by multiple programs on the system. Without these libraries, the Linux system cannot function correctly. It was discovered that, under certain circumstances, glibc's getaddrinfo() function would send DNS queries to random file descriptors. An attacker could potentially use this flaw to send DNS queries to unintended recipients, resulting in information disclosure or data loss due to the application encountering corrupted data.

tags | advisory, info disclosure
systems | linux, redhat, osx
advisories | CVE-2013-7423, CVE-2015-1472, CVE-2015-1473, CVE-2015-1781
SHA-256 | f94e9bae1ee9312a7c4a7f82ecb9725f410c0b7a137de93a1b8c44897482e087
Ubuntu Security Notice USN-2985-1
Posted May 26, 2015
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2985-1 - Martin Carpenter discovered that pt_chown in the GNU C Library did not properly check permissions for tty files. A local attacker could use this to gain administrative privileges or expose sensitive information. Robin Hack discovered that the Name Service Switch (NSS) implementation in the GNU C Library did not properly manage its file descriptors. An attacker could use this to cause a denial of service (infinite loop). Various other issues were also addressed.

tags | advisory, denial of service, local
systems | linux, ubuntu
advisories | CVE-2013-2207, CVE-2014-8121, CVE-2014-9761, CVE-2015-1781, CVE-2015-5277, CVE-2015-8776, CVE-2015-8777, CVE-2015-8778, CVE-2015-8779, CVE-2016-2856, CVE-2016-3075
SHA-256 | 493c76ea8ce318894b316a5a208fb8df41462f866dbab930ef81d92361f8208c
Mandriva Linux Security Advisory 2015-218
Posted Apr 30, 2015
Authored by Mandriva | Site mandriva.com

Mandriva Linux Security Advisory 2015-218 - Multiple vulnerabilities have been found and corrected in glibc. It was discovered that, under certain circumstances, glibc's getaddrinfo() function would send DNS queries to random file descriptors. An attacker could potentially use this flaw to send DNS queries to unintended recipients, resulting in information disclosure or data loss due to the application encountering corrupted data. Various other issues were also addressed. The updated packages provides a solution for these security issues.

tags | advisory, vulnerability, info disclosure
systems | linux, mandriva
advisories | CVE-2013-7423, CVE-2015-1781
SHA-256 | ca67e4afc95e67b314459d08aafa35fbb3e1d19b574ae36b9849508247891508
Red Hat Security Advisory 2015-0863-01
Posted Apr 21, 2015
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2015-0863-01 - The glibc packages provide the standard C libraries, POSIX thread libraries, standard math libraries, and the Name Server Caching Daemon used by multiple programs on the system. Without these libraries, the Linux system cannot function correctly. A buffer overflow flaw was found in the way glibc's gethostbyname_r() and other related functions computed the size of a buffer when passed a misaligned buffer as input. An attacker able to make an application call any of these functions with a misaligned buffer could use this flaw to crash the application or, potentially, execute arbitrary code with the permissions of the user running the application.

tags | advisory, overflow, arbitrary
systems | linux, redhat, osx
advisories | CVE-2013-7423, CVE-2015-1781
SHA-256 | 3fda2d2de3dbc012f471e38333e69c22019fc8670e36541d0d45378234b7d9c9
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