SUSE SLED15 / SLES15 Security Update : git (SUSE-SU-2021:2555-1)

high Nessus Plugin ID 152157
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 SUSE host is missing a security update.

Description

The remote SUSE Linux SLED15 / SLES15 host has packages installed that are affected by a vulnerability as referenced in the SUSE-SU-2021:2555-1 advisory.

- Git is an open-source distributed revision control system. In affected versions of Git a specially crafted repository that contains symbolic links as well as files using a clean/smudge filter such as Git LFS, may cause just-checked out script to be executed while cloning onto a case-insensitive file system such as NTFS, HFS+ or APFS (i.e. the default file systems on Windows and macOS). Note that clean/smudge filters have to be configured for that. Git for Windows configures Git LFS by default, and is therefore vulnerable. The problem has been patched in the versions published on Tuesday, March 9th, 2021. As a workaound, if symbolic link support is disabled in Git (e.g. via `git config --global core.symlinks false`), the described attack won't work. Likewise, if no clean/smudge filters such as Git LFS are configured globally (i.e. _before_ cloning), the attack is foiled. As always, it is best to avoid cloning repositories from untrusted sources. The earliest impacted version is 2.14.2. The fix versions are:
2.30.1, 2.29.3, 2.28.1, 2.27.1, 2.26.3, 2.25.5, 2.24.4, 2.23.4, 2.22.5, 2.21.4, 2.20.5, 2.19.6, 2.18.5, 2.17.62.17.6. (CVE-2021-21300)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

See Also

https://bugzilla.suse.com/1168930

https://bugzilla.suse.com/1183026

https://bugzilla.suse.com/1183580

http://www.nessus.org/u?c407d1fe

https://www.suse.com/security/cve/CVE-2021-21300

Plugin Details

Severity: High

ID: 152157

File Name: suse_SU-2021-2555-1.nasl

Version: 1.3

Type: local

Agent: unix

Published: 7/30/2021

Updated: 8/9/2021

Dependencies: ssh_get_info.nasl

Risk Information

CVSS Score Source: CVE-2021-21300

VPR

Risk Factor: Critical

Score: 9

CVSS v2

Risk Factor: Medium

Base Score: 5.1

Temporal Score: 3.8

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

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

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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

Vulnerability Information

CPE: p-cpe:/a:novell:suse_linux:git, p-cpe:/a:novell:suse_linux:git-arch, p-cpe:/a:novell:suse_linux:git-core, p-cpe:/a:novell:suse_linux:git-cvs, p-cpe:/a:novell:suse_linux:git-daemon, p-cpe:/a:novell:suse_linux:git-doc, p-cpe:/a:novell:suse_linux:git-email, p-cpe:/a:novell:suse_linux:git-gui, p-cpe:/a:novell:suse_linux:git-svn, p-cpe:/a:novell:suse_linux:git-web, p-cpe:/a:novell:suse_linux:gitk, p-cpe:/a:novell:suse_linux:perl-Git, cpe:/o:novell:suse_linux:15

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/SuSE/release, Host/SuSE/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 7/29/2021

Vulnerability Publication Date: 3/9/2021

Reference Information

CVE: CVE-2021-21300

SuSE: SUSE-SU-2021:2555-1