Vulnerability Details : 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.
Vulnerability category: Denial of service
Products affected by CVE-2021-28903
- cpe:2.3:a:cesnet:libyang:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-28903
0.12%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 46 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-28903
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:N/I:N/A:P |
10.0
|
2.9
|
NIST | |
|
7.5
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
3.9
|
3.6
|
NIST |
CWE ids for CVE-2021-28903
-
The product does not properly control the amount of recursion that takes place, consuming excessive resources, such as allocated memory or the program stack.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-28903
-
https://github.com/CESNET/libyang/issues/1453
The Recursive call of "lyxml_parse_elem" leads to crash · Issue #1453 · CESNET/libyang · GitHubExploit;Issue Tracking;Third Party Advisory
-
https://security.gentoo.org/glsa/202107-54
libyang: Multiple vulnerabilities (GLSA 202107-54) — Gentoo securityThird Party Advisory
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