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Improper Input Validation Affecting git-email package, versions <0:1.8.3.1-22.el7_8

Severity

 Recommended
0.0
high
0
10

Based on CentOS security rating.

Threat Intelligence

EPSS
0.42% (75th percentile)

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  • Snyk IDSNYK-CENTOS7-GITEMAIL-2164660
  • published26 Jul 2021
  • disclosed14 Apr 2020
Report a new vulnerability Found a mistake?

Introduced: 14 Apr 2020

CVE-2020-5260  (opens in a new tab)
CWE-20  (opens in a new tab)

How to fix?

Upgrade Centos:7 git-email to version 0:1.8.3.1-22.el7_8 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream git-email package and not the git-email package as distributed by Centos. See How to fix? for Centos:7 relevant fixed versions and status.

Affected versions of Git have a vulnerability whereby Git can be tricked into sending private credentials to a host controlled by an attacker. Git uses external "credential helper" programs to store and retrieve passwords or other credentials from secure storage provided by the operating system. Specially-crafted URLs that contain an encoded newline can inject unintended values into the credential helper protocol stream, causing the credential helper to retrieve the password for one server (e.g., good.example.com) for an HTTP request being made to another server (e.g., evil.example.com), resulting in credentials for the former being sent to the latter. There are no restrictions on the relationship between the two, meaning that an attacker can craft a URL that will present stored credentials for any host to a host of their choosing. The vulnerability can be triggered by feeding a malicious URL to git clone. However, the affected URLs look rather suspicious; the likely vector would be through systems which automatically clone URLs not visible to the user, such as Git submodules, or package systems built around Git. The problem has been patched in the versions published on April 14th, 2020, going back to v2.17.x. Anyone wishing to backport the change further can do so by applying commit 9a6bbee (the full release includes extra checks for git fsck, but that commit is sufficient to protect clients against the vulnerability). The patched versions are: 2.17.4, 2.18.3, 2.19.4, 2.20.3, 2.21.2, 2.22.3, 2.23.2, 2.24.2, 2.25.3, 2.26.1.

References

CVSS Scores

version 3.1