CVE-2021-28905 — HIGH (7.5)

Vulnerability Description

In function lys_node_free() in libyang <= v1.0.225, it asserts that the value of node->module can't be NULL. But in some cases, node->module can be null, which triggers a reachable assertion (CWE-617).

CVSS Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

HIGH

Affected Products

Vendor	Product	Versions
Cesnet	Libyang	<= 1.0.225

Related Weaknesses (CWE)

CWE-617

References

https://github.com/CESNET/libyang/issues/1452ExploitIssue TrackingPatch
https://security.gentoo.org/glsa/202107-54Third Party Advisory
https://github.com/CESNET/libyang/issues/1452ExploitIssue TrackingPatch
https://security.gentoo.org/glsa/202107-54Third Party Advisory

FAQ

What is CVE-2021-28905?

CVE-2021-28905 is a vulnerability with a CVSS score of 7.5 (HIGH). In function lys_node_free() in libyang <= v1.0.225, it asserts that the value of node->module can't be NULL. But in some cases, node->module can be null, which triggers a reachable assertion (CWE-617)...

How severe is CVE-2021-28905?

CVE-2021-28905 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-28905?

Check the references section above for vendor advisories and patch information. Affected products include: Cesnet Libyang.