PT-2021-4058 · Lua+2 · Lua+2

Andre Bianchi · Published 2021-05-02 · Updated 2024-12-08 · CVE-2021-32921

Positive Technologies (AI Summary)

CVSS v3.1

5.9

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Prosody versions prior to 0.11.9

Description An issue in Prosody allows an attacker to potentially reveal the contents of secret strings through a timing attack. This is due to the use of a non-constant-time algorithm for comparing certain secret strings when running under Lua 5.2 or later. The vulnerability can be exploited by a remote attacker to gain access to confidential data.

Recommendations For versions prior to 0.11.9, update to version 0.11.9 or later to resolve the issue. As a temporary workaround, consider restricting access to sensitive data until the update can be applied.

Fix

Race Condition

Weakness Enumeration

CWE-362

Related Identifiers

ALT-PU-2021-1808

ALT-PU-2021-2611

ALT-PU-2024-16554

BDU:2021-04586

CVE-2021-32921

DLA-2687-1

DLA-2687-2

DSA-4916-1

DSA-4916-2

Affected Products

Alt Linux

Lua

Prosody

References · 31

• https://nvd.nist.gov/vuln/detail/CVE-2021-32921 · Security Note
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LWJ2DG2DFJOEFEWOUN26IMYYWGSA2ZEE · Vendor Advisory
• https://bdu.fstec.ru/vul/2021-04586 · Security Note
• https://ubuntu.com/security/CVE-2021-32921 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2021-32921 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-32921 · Vendor Advisory
• https://debian.org/security/2021/dsa-4916 · Vendor Advisory
• https://osv.dev/vulnerability/DLA-2687-1 · Vendor Advisory
• https://osv.dev/vulnerability/DSA-4916-2 · Vendor Advisory
• https://blog.prosody.im/prosody-0.11.9-released · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-32921 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6MFFBZWXKPZEVZNQSVJNCUE7WRF3T7DG · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-32921 · Vendor Advisory
• https://osv.dev/vulnerability/DLA-2687-2 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2021-32921 · Security Note