Vulnerability · Published May 20, 2021 · Assigned by mitre
CVE-2021-28903
High 7.5
In plain English
A high-severity security flaw in the libyang package (Debian). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.4% (higher than 84% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)7.5High
Exploit odds (30 days)2.4%top 15.7% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:13 | libyang | 3.4.2+dfsg-2 | DEBIAN-CVE-2021-28903 |
| Debian:14 | libyang | 3.4.2+dfsg-2 | DEBIAN-CVE-2021-28903 |
| Ubuntu:22.04:LTS | libyang | no fix listed | UBUNTU-CVE-2021-28903 |
Affected products (as reported)
References
- https://github.com/CESNET/libyang/issues/1453 x_refsource_CONFIRM
- GLSA-202107-54 vendor-advisory, x_refsource_GENTOO