High severity · published May 20, 2021
CVE-2021-28903
A stack overflow in libyang <= v1.0.225 can cause a denial of service through function lyxml_parse_mem()
7.5
CVSS
2.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.4% · higher than 84% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LI
Libyang · Cesnet
through 1.0.225 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-28903
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-28903
Exploit
https://github.com/CESNET/libyang/issues/1453
Third Party Advisory
https://security.gentoo.org/glsa/202107-54
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