PT-2020-12188 · Github · Github Enterprise Server

William Bowling · Published 2020-08-27 · Updated 2021-12-20 · CVE-2020-10518

Positive Technologies (AI Summary)

CVSS v3.1

8.8

High

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions GitHub Enterprise Server versions prior to 2.22

Description A remote code execution issue was identified in GitHub Enterprise Server that could be exploited when building a GitHub Pages site. The user-controlled configuration of the underlying parsers used by GitHub Pages was not sufficiently restricted, making it possible to execute commands on the GitHub Enterprise Server instance. To exploit this issue, an attacker would need permission to create and build a GitHub Pages site on the GitHub Enterprise Server instance.

Recommendations For versions prior to 2.22, update to version 2.21.6, 2.20.15, or 2.19.21 to resolve the issue. As a temporary workaround, consider restricting the ability to create and build GitHub Pages sites on the GitHub Enterprise Server instance until a patch is applied.

Fix

Command Injection

Weakness Enumeration

CWE-77

Related Identifiers

CVE-2020-10518

Affected Products

Github Enterprise Server

References · 7

• https://enterprise.github.com/releases/2.19.21/notes · Vendor Advisory
• https://enterprise.github.com/releases/2.20.15/notes · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-10518 · Security Note
• https://osv.dev/vulnerability/CVE-2020-10518 · Vendor Advisory
• https://enterprise.github.com/releases/2.21.6/notes · Vendor Advisory
• https://t.me/cibsecurity/14361 · Telegram Post
• https://t.me/cybersecuritytechnologies/2053 · Telegram Post