High severity · published May 20, 2021
CVE-2021-28902
In function read_yin_container() in libyang <= v1.0.225, it doesn't check whether the value of retval->ext[r] is NULL
7.5
CVSS
1.6%
EPSS
No
On KEV
Description
In function read_yin_container() in libyang <= v1.0.225, it doesn't check whether the value of retval->ext[r] is NULL. In some cases, it can be NULL, which leads to the operation of retval->ext[r]->flags that results in a 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)1.6% · higher than 75% 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-2021-28902
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-28902
Exploit
https://github.com/CESNET/libyang/issues/1454
Third Party Advisory
https://security.gentoo.org/glsa/202107-54
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