Debian DSA-2265-1 : perl - lack of tainted flag propagation

Medium Nessus Plugin ID 55280

New! Vulnerability Priority Rating (VPR)

Tenable calculates a dynamic VPR for every vulnerability. VPR combines vulnerability information with threat intelligence and machine learning algorithms to predict which vulnerabilities are most likely to be exploited in attacks. Read more about what VPR is and how it's different from CVSS.

VPR Score: 4.2

Synopsis

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

Description

Mark Martinec discovered that Perl incorrectly clears the tainted flag on values returned by case conversion functions such as 'lc'. This may expose preexisting vulnerabilities in applications which use these functions while processing untrusted input. No such applications are known at this stage. Such applications will cease to work when this security update is applied because taint checks are designed to prevent such unsafe use of untrusted input data.

Solution

Upgrade the perl packages.

For the oldstable distribution (lenny), this problem has been fixed in version 5.10.0-19lenny4.

For the stable distribution (squeeze), this problem has been fixed in version 5.10.1-17squeeze1.

See Also

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=622817

https://packages.debian.org/source/squeeze/perl

https://www.debian.org/security/2011/dsa-2265

Plugin Details

Severity: Medium

ID: 55280

File Name: debian_DSA-2265.nasl

Version: 1.11

Type: local

Agent: unix

Published: 2011/06/21

Updated: 2020/03/12

Dependencies: 12634

Risk Information

Risk Factor: Medium

VPR Score: 4.2

CVSS v2.0

Base Score: 5

Temporal Score: 3.9

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

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

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:perl, cpe:/o:debian:debian_linux:5.0, cpe:/o:debian:debian_linux:6.0

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: 2011/06/20

Reference Information

CVE: CVE-2011-1487

BID: 47124

DSA: 2265