CVE-2021-32921 log

Source	CVE Red Hat MITRE NVD Debian Ubuntu SUSE Alpine Mageia CVE Details CIRCL Bugs Arch Linux Red Hat Gentoo SUSE GitHub Lists oss-security full-disclosure bugtraq Misc GitHub code web search
Severity	Medium
Remote	Yes
Type	Information disclosure
Description	A security issue was found in the Prosody.im XMPP server software before version 0.11.9. It was discovered that Prosody 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.

Group	Package	Affected	Fixed	Severity	Status	Ticket
AVG-1955	prosody	1:0.11.8-1	1:0.11.9-1	High	Fixed

Date	Advisory	Group	Package	Severity	Type
19 May 2021	ASA-202105-11	AVG-1955	prosody	High	multiple issues

References
https://prosody.im/security/advisory_20210512/#use-of-timing-dependent-string-comparison-with-sensitive-values https://hg.prosody.im/trunk/rev/c98aebe601f9 https://hg.prosody.im/trunk/rev/13b84682518e https://hg.prosody.im/trunk/rev/6f56170ea986

References

https://prosody.im/security/advisory_20210512/#use-of-timing-dependent-string-comparison-with-sensitive-values
https://hg.prosody.im/trunk/rev/c98aebe601f9
https://hg.prosody.im/trunk/rev/13b84682518e
https://hg.prosody.im/trunk/rev/6f56170ea986

Notes
The issue can partly be mitigated by enabling and configuring rate limits through mod_limits in order to lengthen the amount of time required to successfully complete a timing attack.