What’s Vulnerable › Vulnerabilities

CVE-2021-38562

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-10-18 · updated 2026-06-17
• Weakness: CWE-203

Description

Best Practical Request Tracker (RT) 4.2 before 4.2.17, 4.4 before 4.4.5, and 5.0 before 5.0.2 allows sensitive information disclosure via a timing attack against lib/RT/REST2/Middleware/Auth.pm.

Affected products

• Best Practical Request Tracker: from 4.2.0 before 4.2.17; from 4.4.0 before 4.4.5; from 5.0.0 before 5.0.2 — fixed in 4.2.17, 4.4.5, 5.0.2
• Debian Linux: 9.0
• Fedoraproject Fedora: 35

How to fix

Upgrade to a fixed version: Best Practical Request Tracker 4.2.17, 4.4.5, 5.0.2. Check the vendor advisory for mitigations.

References

• https://docs.bestpractical.com/release-notes/rt/index.html
• https://github.com/bestpractical/rt/commit/70749bb66cb13dd70bd53340c371038a5f3ca57c
• https://lists.debian.org/debian-lts-announce/2022/06/msg00019.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2JK57CEEXLQF7MGBCUX76DZHXML7LUSQ/
• https://docs.bestpractical.com/release-notes/rt/index.html
• https://github.com/bestpractical/rt/commit/70749bb66cb13dd70bd53340c371038a5f3ca57c
• https://lists.debian.org/debian-lts-announce/2022/06/msg00019.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2JK57CEEXLQF7MGBCUX76DZHXML7LUSQ/

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