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Slackware Linux 14.0 / 14.1 / 14.2 / 15.0 / current git Multiple Vulnerabilities (SSA:2022-291-01)

high Nessus Plugin ID 166228

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Synopsis

The remote Slackware Linux host is missing a security update to git.

Description

The version of git installed on the remote host is prior to 2.30.6 / 2.35.5 / 2.38.1. It is, therefore, affected by multiple vulnerabilities as referenced in the SSA:2022-291-01 advisory.

 - When relying on the `--local` clone optimization, Git dereferences symbolic links in the source repository before creating hardlinks (or copies) of the dereferenced link in the destination repository. This can lead to surprising behavior where arbitrary files are present in a repository's `$GIT_DIR` when cloning from a malicious repository. Git will no longer dereference symbolic links via the `--local` clone mechanism, and will instead refuse to clone repositories that have symbolic links present in the `$GIT_DIR/objects` directory. Additionally, the value of `protocol.file.allow` is changed to be user by default. An overly-long command string given to `git shell` can result in overflow in `split_cmdline()`, leading to arbitrary heap writes and remote code execution when `git shell` is exposed and the directory `$HOME/git-shell-commands` exists. `git shell` is taught to refuse interactive commands that are longer than 4MiB in size.
 `split_cmdline()` is hardened to reject inputs larger than 2GiB. (CVE-2022-39253, CVE-2022-39260)

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

Solution

Upgrade the affected git package.

Plugin Details

Severity: High

ID: 166228

File Name: Slackware_SSA_2022-291-01.nasl

Version: 1.4

Type: local

Published: 10/18/2022

Updated: 11/29/2022

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.4

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

CVSS Score Source: CVE-2022-39260

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/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:slackware:slackware_linux:git, cpe:/o:slackware:slackware_linux, cpe:/o:slackware:slackware_linux:14.0, cpe:/o:slackware:slackware_linux:14.1, cpe:/o:slackware:slackware_linux:14.2, cpe:/o:slackware:slackware_linux:15.0

Required KB Items: Host/local_checks_enabled, Host/Slackware/release, Host/Slackware/packages

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 10/18/2022

Reference Information

CVE: CVE-2022-39253, CVE-2022-39260