Debian DLA-316-1 : eglibc security update

medium Nessus Plugin ID 86155


The remote Debian host is missing a security update.


Several vulnerabilities have been discovered in eglibc that may lead to a privilege escalation or denial of service.

Glibc pointer guarding weakness

A weakness in the dynamic loader prior has been found. The issue is that the LD_POINTER_GUARD in the environment is not sanitized allowing local attackers easily to bypass the pointer guarding protection on set-user-ID and set-group-ID programs.

Potential application crash due to overread in fnmatch

When processing certain malformed patterns, fnmatch can skip over the NUL byte terminating the pattern. This can potentially result in an application crash if fnmatch hits an unmapped page before encountering a NUL byte.

_IO_wstr_overflow integer overflow

A miscalculation in _IO_wstr_overflow could potentially be exploited to overflow a buffer.


DB_LOOKUP in nss_files/files-XXX.c in the Name Service Switch (NSS) in GNU C Library (aka glibc or libc6) 2.21 and earlier does not properly check if a file is open, which allows remote attackers to cause a denial of service (infinite loop) by performing a look-up while the database is iterated over the database, which triggers the file pointer to be reset.

For the oldoldstable distribution (squeeze), these problems have been fixed in version 2.11.3-4+deb6u7.

We recommend that you update your packages.

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.


Upgrade the affected packages.

See Also

Plugin Details

Severity: Medium

ID: 86155

File Name: debian_DLA-316.nasl

Version: 2.5

Type: local

Agent: unix

Published: 9/28/2015

Updated: 1/11/2021

Supported Sensors: Agentless Assessment, Frictionless Assessment Agent, Nessus Agent

Risk Information


Risk Factor: Low

Score: 3.6


Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

Temporal Vector: E:U/RL:OF/RC:C

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:eglibc-source, p-cpe:/a:debian:debian_linux:glibc-doc, p-cpe:/a:debian:debian_linux:libc-bin, p-cpe:/a:debian:debian_linux:libc-dev-bin, p-cpe:/a:debian:debian_linux:libc6, p-cpe:/a:debian:debian_linux:libc6-amd64, p-cpe:/a:debian:debian_linux:libc6-dbg, p-cpe:/a:debian:debian_linux:libc6-dev, p-cpe:/a:debian:debian_linux:libc6-dev-amd64, p-cpe:/a:debian:debian_linux:libc6-dev-i386, p-cpe:/a:debian:debian_linux:libc6-i386, p-cpe:/a:debian:debian_linux:libc6-i686, p-cpe:/a:debian:debian_linux:libc6-pic, p-cpe:/a:debian:debian_linux:libc6-prof, p-cpe:/a:debian:debian_linux:libc6-udeb, p-cpe:/a:debian:debian_linux:libc6-xen, p-cpe:/a:debian:debian_linux:libnss-dns-udeb, p-cpe:/a:debian:debian_linux:libnss-files-udeb, p-cpe:/a:debian:debian_linux:locales, p-cpe:/a:debian:debian_linux:locales-all, p-cpe:/a:debian:debian_linux:nscd, cpe:/o:debian:debian_linux:6.0

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 9/27/2015

Reference Information

CVE: CVE-2014-8121

BID: 73038