Debian DSA-3984-1 : git - security update

high Nessus Plugin ID 103473
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Synopsis

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

Description

joernchen discovered that the git-cvsserver subcommand of Git, a distributed version control system, suffers from a shell command injection vulnerability due to unsafe use of the Perl backtick operator. The git-cvsserver subcommand is reachable from the git-shell subcommand even if CVS support has not been configured (however, the git-cvs package needs to be installed).

In addition to fixing the actual bug, this update removes the cvsserver subcommand from git-shell by default. Refer to the updated documentation for instructions how to reenable in case this CVS functionality is still needed.

Solution

Upgrade the git packages.

For the oldstable distribution (jessie), this problem has been fixed in version 1:2.1.4-2.1+deb8u5.

For the stable distribution (stretch), this problem has been fixed in version 1:2.11.0-3+deb9u2.

See Also

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=876854

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

https://packages.debian.org/source/stretch/git

https://www.debian.org/security/2017/dsa-3984

Plugin Details

Severity: High

ID: 103473

File Name: debian_DSA-3984.nasl

Version: 3.9

Type: local

Agent: unix

Published: 9/27/2017

Updated: 1/4/2021

Dependencies: ssh_get_info.nasl

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: High

Base Score: 9

Temporal Score: 6.7

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

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

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

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

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

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:git, cpe:/o:debian:debian_linux:8.0, cpe:/o:debian:debian_linux:9.0

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

Exploit Ease: No known exploits are available

Patch Publication Date: 9/26/2017

Reference Information

CVE: CVE-2017-14867

DSA: 3984