Buffer overflow in Cinny_project Cinny
CVE-2021-44538
The olm_session_describe function in Matrix libolm before 3.2.7 is vulnerable to a buffer overflow. The Olm session object represents a cryptographic channel between two parties. Therefore, its state is partially controllable by the remote…
Vulnerability class: Buffer Overflow
EPSS: 0.019 (77.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Cinny_project Cinny
- Matrix Element
- Matrix Javascript_sdk
- Matrix Olm
- Schildi Schildichat
- Debian Debian_linux — versions 9.0, 10.0, 11.0
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (Product, Third Party Advisory, x_refsource_MISC)
- cve@mitre.org (Patch, x_refsource_MISC, Vendor Advisory)
- cve@mitre.org (vendor-advisory, Third Party Advisory, x_refsource_DEBIAN)
- cve@mitre.org (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-44538?
- CVE-2021-44538 is a critical-severity vulnerability in Cinny_project Cinny, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.8/10. Published 2021-12-14.
- How severe is CVE-2021-44538?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2021-44538 known to be exploited?
- 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.