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Debian 8: DSA-3480-1 Critical: eglibc Buffer Overflow Issues

debian
Calendar Grey February 16, 2016
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A significant eglibc patch mitigates various security flaws, tackling stack overflow and denial of service risks for Debian systems.
Several vulnerabilities have been fixed in the GNU C Library, eglibc

Summary

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 sta...

Read the Full Advisory

Severity
critical
Lowest
Low
Medium
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Critical

Package: eglibc
CVE ID: CVE-2014-8121 CVE-2015-1781 CVE-2015-7547 CVE-2015-8776

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