CVE-2024-45191: matrix olm Observable Timing Discrepancy
Vulnerability summary
CVE-2024-45191 is a medium (CVSS 5.3) Observable Timing Discrepancy vulnerability in matrix olm. EPSS estimates a 0.45% chance of exploitation in the next 30 days, higher than 38% of scored vulnerabilities. 1 public exploit is recorded.
Advisory lineage
Upstream 0 · Downstream 0 · Related 1Timeline
- 22-08-2024PublishedVulnerability first disclosed.
- 10-09-2024Last modifiedVulnerability information updated.
Description
An issue was discovered in Matrix libolm through 3.2.16. The AES implementation is vulnerable to cache-timing attacks due to use of S-boxes. This is related to software that uses a lookup table for the SubWord step. This refers to the libolm implementation of Olm. NOTE: This vulnerability only affects products that are no longer supported by the maintainer.
CVSS metrics
4 scores · 4 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated5.3MediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N
- OSV · DebianEcosystem advisory · calculated5.3MediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N
- NVDNIST5.3MediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N
EPSS trend
Probability
0.45%
Chance of exploitation in the next 30 days
Percentile
38%
Versus all other CVEs
30-day change
0.00 pp
From 0.45% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (soatok.blog)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Debian1 product
- olmAll versions (No fix recorded)
Matrix1 product
- olm≤ 3.2.16
Ubuntu1 product
- olmAll versions (No fix recorded)
3 vendors · 3 products
