CVE-2021-32921
Medium
Description
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.
SeverityMedium
CVSS5.9
Exploit probability—
Product
Prosody
PublishedMay 13, 2021
First seenMay 13, 2021
How to fix
Update
- prosody prosody0.11.9 or later
Vendor advisories
- debian.org/security/2021/dsa-4916
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6MFFBZWXKPZEVZNQSVJNCUE7WRF3T7DG/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LWJ2DG2DFJOEFEWOUN26IMYYWGSA2ZEE/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GUN63AHEWB2WRROJHU3BVJRWLONCT2B7/
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| prosody prosody | v < 0.11.9 | 0.11.9 |
| fedoraproject fedora | 32, 33, 34 | — |
| debian debian_linux | 9.0 | — |
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