Debian DSA-3481-1 : glibc - security update

Critical Nessus Plugin ID 88768

Synopsis

The remote Debian host is missing a security-related update.

Description

Several vulnerabilities have been fixed in the GNU C Library, glibc.

The first vulnerability listed below is considered to have critical impact.

- CVE-2015-7547 The Google Security Team and Red Hat discovered that the glibc 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.

- CVE-2015-8776 Adam Nielsen discovered that if an invalid separated time value is passed to strftime, the strftime function could crash or leak information. Applications normally pass only valid time information to strftime; no affected applications are known.

- CVE-2015-8778 Szabolcs Nagy reported that the rarely-used hcreate and hcreate_r functions did not check the size argument properly, leading to a crash (denial of service) for certain arguments. No impacted applications are known at this time.

- CVE-2015-8779 The catopen function contains several unbound stack allocations (stack overflows), causing it the crash the process (denial of service). No applications where this issue has a security impact are currently known.

While it is only necessary to ensure that all processes are not using the old glibc anymore, it is recommended to reboot the machines after applying the security upgrade.

Solution

Upgrade the glibc packages.

For the stable distribution (jessie), these problems have been fixed in version 2.19-18+deb8u3.

See Also

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=812441

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=812445

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=812455

https://security-tracker.debian.org/tracker/CVE-2015-7547

https://security-tracker.debian.org/tracker/CVE-2015-8776

https://security-tracker.debian.org/tracker/CVE-2015-8778

https://security-tracker.debian.org/tracker/CVE-2015-8779

https://packages.debian.org/source/jessie/glibc

https://www.debian.org/security/2016/dsa-3481

https://www.tenable.com/security/research/tra-2017-08

Plugin Details

Severity: Critical

ID: 88768

File Name: debian_DSA-3481.nasl

Version: 2.13

Type: local

Agent: unix

Published: 2016/02/17

Updated: 2019/04/11

Dependencies: 12634

Risk Information

Risk Factor: Critical

CVSS v2.0

Base Score: 10

Temporal Score: 7.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

Temporal Vector: CVSS2#E:POC/RL:OF/RC:C

CVSS v3.0

Base Score: 9.8

Temporal Score: 8.8

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

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:glibc, cpe:/o:debian:debian_linux:8.0

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2016/02/16

Reference Information

CVE: CVE-2015-7547, CVE-2015-8776, CVE-2015-8778, CVE-2015-8779

DSA: 3481

TRA: TRA-2017-08

IAVA: 2016-A-0053