CVE-2024-45193: olm Weak Crypto — Exploit & Fix

Description

An issue was discovered in Matrix libolm through 3.2.16. There is Ed25519 signature malleability due to lack of validation criteria (does not ensure that S < n). This refers to the libolm implementation of Olm. NOTE: This vulnerability only affects products that are no longer supported by the maintainer.

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CVSS v3.1 Score

4.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Weakness Type (CWE)

CWE-327 CWE-327

Affected Products

Vendor	Product	Versions
matrix	olm	< 3.2.16

References

Advisories & Patches

https://gitlab.matrix.org/matrix-org/olm/-/commit/6d4b5b07887821a95b144091c8497d09d377f985

Exploits

https://soatok.blog/2024/08/14/security-issues-in-matrixs-olm-library/

Other References

https://gitlab.matrix.org/matrix-org/olm/ https://news.ycombinator.com/item?id=41249371

Frequently Asked Questions

What is CVE-2024-45193? +

An issue was discovered in Matrix libolm through 3.2.16. There is Ed25519 signature malleability due to lack of validation criteria (does not ensure that S < n). This refers to the libolm implementation of Olm. NOTE: This vulnerability only affects products that are no longer supported by the maintainer. It has a CVSS v3.1 base score of 4.3 (MEDIUM).

How severe is CVE-2024-45193? +

CVE-2024-45193 has a CVSS v3.1 score of 4.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2024-45193? +

CVE-2024-45193 affects products from matrix, specifically: olm. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-45193? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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CVE-2024-45193