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EulerOS 2.0 SP5 : git (EulerOS-SA-2021-1897)

high Nessus Plugin ID 149540

Synopsis

The remote EulerOS host is missing a security update.

Description

According to the version of the git packages installed, the EulerOS installation on the remote host is affected by the following vulnerability :

 - 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.(CVE-2021-21300)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

Update the affected git package.

See Also

http://www.nessus.org/u?162c8579

Plugin Details

Severity: High

ID: 149540

File Name: EulerOS_SA-2021-1897.nasl

Version: 1.4

Type: local

Published: 5/18/2021

Updated: 1/1/2024

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: High

Score: 8.4

CVSS v2

Risk Factor: Medium

Base Score: 5.1

Temporal Score: 4.2

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

CVSS Score Source: CVE-2021-21300

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 7

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

Temporal Vector: CVSS:3.0/E:F/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:huawei:euleros:git, p-cpe:/a:huawei:euleros:git-core-doc, p-cpe:/a:huawei:euleros:git-core, cpe:/o:huawei:euleros:2.0, p-cpe:/a:huawei:euleros:perl-git

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

Excluded KB Items: Host/EulerOS/uvp_version

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 5/18/2021

Exploitable With

Metasploit (Git LFS Clone Command Exec)

Reference Information

CVE: CVE-2021-21300