PT-2021-7235 · Gitlab · Gitlab Runner+1

Published 2021-08-23 · Updated 2023-08-08 · CVE-2021-39947

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

AV:N/AC:L/Au:N/C:C/I:N/A:N

Name of the Vulnerable Software and Affected Versions GitLab Runner versions up to 14.3.4 GitLab Runner versions 14.4 to 14.4.2 GitLab Runner versions 14.5 to 14.5.2

Description The issue is related to information disclosure in GitLab Runner. In specific circumstances, trace file buffers would re-use the file descriptor 0 for multiple traces and mix the output of several jobs, potentially allowing a remote attacker to disclose protected information.

Recommendations For GitLab Runner versions up to 14.3.4, update to a version later than 14.3.4 to resolve the issue. For GitLab Runner versions 14.4 to 14.4.2, update to a version later than 14.4.2 to resolve the issue. For GitLab Runner versions 14.5 to 14.5.2, update to a version later than 14.5.2 to resolve the issue. As a temporary workaround, consider restricting access to trace file buffers to minimize the risk of exploitation.

Fix

Information Disclosure

Weakness Enumeration

CWE-200

Related Identifiers

BDU:2022-03957

CVE-2021-39947

Affected Products

Gitlab

Gitlab Runner

References · 11

• https://osv.dev/vulnerability/CVE-2021-39947 · Vendor Advisory
• https://bdu.fstec.ru/vul/2022-03957 · Security Note
• https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39947.json · Patch
• https://ubuntu.com/security/CVE-2021-39947 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-39947 · Security Note
• https://cve.org/CVERecord?id=CVE-2021-39947 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-39947 · Vendor Advisory
• https://vuldb.com/?id.201315 · Note
• https://t.me/cibsecurity/43858 · Telegram Post
• https://about.gitlab.com/releases/2021/12/10/security-release-gitlab-runner-14-5-2-released · Note
• https://gitlab.com/gitlab-org/gitlab-runner/-/issues/28732 · Note