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CVE-2021-32921

Date: May 13, 2021

An issue was discovered in Prosody before 0.11.9. It does not use a constant-time algorithm for comparing certain secret strings when running under Lua 5.2 or later. This can potentially be used in a timing attack to reveal the contents of secret strings to an attacker.

Language: LUA

Severity Score

Related Resources (18)

https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6MFFBZWXKPZEVZNQSVJNCUE7WRF3T7DG/
https://security-tracker.debian.org/tracker/CVE-2021-32921
https://security.gentoo.org/glsa/202105-15
http://www.openwall.com/lists/oss-security/2021/05/13/1
http://www.openwall.com/lists/oss-security/2021/05/14/2
https://blog.prosody.im/prosody-0.11.9-released/
https://nvd.nist.gov/vuln/detail/CVE-2021-32921
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LWJ2DG2DFJOEFEWOUN26IMYYWGSA2ZEE/
https://lists.debian.org/debian-lts-announce/2021/06/msg00016.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GUN63AHEWB2WRROJHU3BVJRWLONCT2B7/
https://www.debian.org/security/2021/dsa-4916
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GUN63AHEWB2WRROJHU3BVJRWLONCT2B7/
https://security.alpinelinux.org/vuln/CVE-2021-32921
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6MFFBZWXKPZEVZNQSVJNCUE7WRF3T7DG/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LWJ2DG2DFJOEFEWOUN26IMYYWGSA2ZEE/
https://lists.debian.org/debian-lts-announce/2021/06/msg00018.html
https://people.canonical.com/~ubuntu-security/cve/CVE-2021-32921
https://www.mend.io/vulnerability-database/CVE-2021-32921

Severity Score

Weakness Type (CWE)

Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CWE-362

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): HIGH
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): NONE
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): MEDIUM
Authentication (AU): NONE
Confidentiality (C): PARTIAL
Integrity (I): NONE
Availability (A): NONE
Additional information:

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