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CVE-2021-28905

Date: May 20, 2021

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). After conducting further research, Mend has determined that all versions of libyang up to version v1.0.225 are vulnerable to CVE-2021-28905.

Language: C

Severity Score

Related Resources (8)

https://github.com/CESNET/libyang/issues/1452
https://security.gentoo.org/glsa/202107-54
https://access.redhat.com/security/cve/CVE-2021-28905
https://nvd.nist.gov/vuln/detail/CVE-2021-28905
https://security-tracker.debian.org/tracker/CVE-2021-28905
https://people.canonical.com/~ubuntu-security/cve/CVE-2021-28905
https://security.alpinelinux.org/vuln/CVE-2021-28905
https://www.mend.io/vulnerability-database/CVE-2021-28905

Severity Score

Weakness Type (CWE)

Reachable Assertion

CWE-617

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): PARTIAL
Additional information:

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