Vulnerability in Cesnet Libyang
CVE-2021-28903
A stack overflow in libyang <= v1.0.225 can cause a denial of service through function lyxml_parse_mem(). lyxml_parse_elem() function will be called recursively, which will consume stack space and lead to crash.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.024 (83.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 84th percentile — 83.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.024 · newest: 0.024 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/CESNET/libyang/issues/1453 (Exploit, Third Party Advisory, Issue Tracking)
- security.gentoo.org/glsa/202107-54 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-28903?
- CVE-2021-28903 is a high-severity vulnerability in Cesnet Libyang, classified under Uncontrolled Recursion. CVSS score: 7.5/10. Published 2021-05-20.
- How severe is CVE-2021-28903?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2021-28903 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.