Vulnerability Details : CVE-2021-32921
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.
Exploit prediction scoring system (EPSS) score for CVE-2021-32921
Probability of exploitation activity in the next 30 days: 0.28%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 64 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2021-32921
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|
|
4.3
|
MEDIUM | AV:N/AC:M/Au:N/C:P/I:N/A:N |
8.6
|
2.9
|
[email protected] |
|
5.9
|
MEDIUM | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N |
2.2
|
3.6
|
[email protected] |
CWE ids for CVE-2021-32921
-
The product contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently.Assigned by: [email protected] (Primary)
References for CVE-2021-32921
-
https://blog.prosody.im/prosody-0.11.9-released/
Release Notes;Vendor Advisory
-
https://lists.fedoraproject.org/archives/list/[email protected]/message/6MFFBZWXKPZEVZNQSVJNCUE7WRF3T7DG/
Mailing List;Third Party Advisory
-
https://www.debian.org/security/2021/dsa-4916
Third Party Advisory
-
https://lists.fedoraproject.org/archives/list/[email protected]/message/GUN63AHEWB2WRROJHU3BVJRWLONCT2B7/
Mailing List;Third Party Advisory
-
http://www.openwall.com/lists/oss-security/2021/05/14/2
Mailing List;Mitigation;Third Party Advisory
-
https://lists.debian.org/debian-lts-announce/2021/06/msg00018.html
Third Party Advisory
-
https://lists.fedoraproject.org/archives/list/[email protected]/message/LWJ2DG2DFJOEFEWOUN26IMYYWGSA2ZEE/
Mailing List;Third Party Advisory
-
https://security.gentoo.org/glsa/202105-15
Third Party Advisory
-
http://www.openwall.com/lists/oss-security/2021/05/13/1
Mailing List;Third Party Advisory
-
https://lists.debian.org/debian-lts-announce/2021/06/msg00016.html
Mailing List;Third Party Advisory
Products affected by CVE-2021-32921
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
- cpe:2.3:a:prosody:prosody:*:*:*:*:*:*:*:*