Debian Security Advisory DSA 3480-1 (eglibc - security update)

Published: 2016-02-15 23:00:00
CVE Author: NIST National Vulnerability Database

CVSS Base Vector:
AV:N/AC:L/Au:N/C:P/I:P/A:P

severity_vector=CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

severity_origin=NVD

severity_date=2018-10-30 16:27:00 +0000 (Tue, 30 Oct 2018)

Solution Type:
Vendor Patch

Detection Type:
Linux Distribution Package

Affected Versions:
eglibc on Debian Linux

Recommendations:
For the oldstable distribution (wheezy), these problems have been fixed in version 2.13-38+deb7u10. We recommend that you upgrade your eglibc Linux Distribution Packages.

Summary:
Several vulnerabilities have been fixed in the GNU C Library, eglibc. The CVE-2015-7547 vulnerability listed below is considered to have critical impact. CVE-2014-8121 Robin Hack discovered that the nss_files database did not correctly implement enumeration interleaved with name-based or ID-based lookups. This could cause the enumeration enter an endless loop, leading to a denial of service. CVE-2015-1781 Arjun Shankar discovered that the _r variants of host name resolution functions (like gethostbyname_r), when performing DNS name resolution, suffered from a buffer overflow if a misaligned buffer was supplied by the applications, leading to a crash or, potentially, arbitrary code execution. Most applications are not affected by this vulnerability because they use aligned buffers. CVE-2015-7547 The Google Security Team and Red Hat discovered that the eglibc host name resolver function, getaddrinfo, when processing AF_UNSPEC queries (for dual A/AAAA lookups), could mismanage its internal buffers, leading to a stack-based buffer overflow and arbitrary code execution. This vulnerability affects most applications which perform host name resolution using getaddrinfo, including system services. Description truncated. Please see the references for more information. While it is only necessary to ensure that all processes are not using the old eglibc anymore, it is recommended to reboot the machines after applying the security upgrade.

Detection Method:
This check tests the installed software version using the apt Linux Distribution Package manager.

NIST (National Institute of Standards and Technology) NVD (National Vulnerability Database)

https://nvd.nist.gov/vuln/detail/CVE-2014-8121
https://nvd.nist.gov/vuln/detail/CVE-2015-1781
https://nvd.nist.gov/vuln/detail/CVE-2015-7547
https://nvd.nist.gov/vuln/detail/CVE-2015-8776
https://nvd.nist.gov/vuln/detail/CVE-2015-8777
https://nvd.nist.gov/vuln/detail/CVE-2015-8778
https://nvd.nist.gov/vuln/detail/CVE-2015-8779

References:

http://www.debian.org/security/2016/dsa-3480.html

Severity
High
CVSS Score
7.5
Published
2016-02-15
Modified
2021-11-24
Category
Debian Local Security Checks

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