Debian DSA-3653-1 : flex - security update

High Nessus Plugin ID 93116

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VPR Score: 5.9

Synopsis

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

Description

Alexander Sulfrian discovered a buffer overflow in the yy_get_next_buffer() function generated by Flex, which may result in denial of service and potentially the execution of code if operating on data from untrusted sources.

Affected applications need to be rebuild. bogofilter will be rebuild against the updated flex in a followup update. Further affected applications should be reported at the bug referenced above.

Solution

Upgrade the flex packages.

For the stable distribution (jessie), this problem has been fixed in version 2.5.39-8+deb8u1.

See Also

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=832768

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

https://www.debian.org/security/2016/dsa-3653

Plugin Details

Severity: High

ID: 93116

File Name: debian_DSA-3653.nasl

Version: 2.10

Type: local

Agent: unix

Published: 2016/08/26

Updated: 2021/01/11

Dependencies: 12634

Risk Information

Risk Factor: High

VPR Score: 5.9

CVSS v2.0

Base Score: 7.5

Temporal Score: 5.5

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

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

CVSS v3.0

Base Score: 9.8

Temporal Score: 8.5

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:U/RL:O/RC:C

Vulnerability Information

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

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

Exploit Available: false

Exploit Ease: No known exploits are available

Patch Publication Date: 2016/08/25

Reference Information

CVE: CVE-2016-6354

DSA: 3653