Detections
Analytics

Fedora 36 : git (2022-8b58806840)

high Nessus Plugin ID 169173

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Synopsis

The remote Fedora host is missing one or more security updates.

Description

The remote Fedora 36 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2022-8b58806840 advisory.

 Upstream update including security & bug fixes as well as feature enhancements.

 From the upstream [release notes](https://github.com/git/git/raw/v2.38.1/Documentation/RelNotes/2.30.6.txt):

 CVE-2022-39253
 --------------

 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.

 CVE-2022-39260
 --------------

 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.

 Credits
 -------

 Credit for finding CVE-2022-39253 goes to Cory Snider of Mirantis. The fix was authored by Taylor Blau, with help from Johannes Schindelin.

 Credit for finding CVE-2022-39260 goes to Kevin Backhouse of GitHub.
 The fix was authored by Kevin Backhouse, Jeff King, and Taylor Blau.

Tenable has extracted the preceding description block directly from the Fedora security advisory.

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

Solution

Update the affected git package.

See Also

https://bodhi.fedoraproject.org/updates/FEDORA-2022-8b58806840

Plugin Details

Severity: High

ID: 169173

File Name: fedora_2022-8b58806840.nasl

Version: 1.1

Type: local

Agent: unix

Published: 12/22/2022

Updated: 11/14/2024

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Nessus Agent, 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: cpe:/o:fedoraproject:fedora:36, p-cpe:/a:fedoraproject:fedora:git

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

Exploit Ease: No known exploits are available

Patch Publication Date: 10/19/2022

Vulnerability Publication Date: 10/18/2022

Reference Information

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