Libyang
CVE-2021-28905
HIGH
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Lifecycle Timeline
1DescriptionNVD
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).
AnalysisAI
In function lys_node_free() in libyang <= v1.0.225, it asserts that the value of node->module can't be NULL. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
Technical ContextAI
This vulnerability is classified under CWE-617. 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). Affected products include: Cesnet Libyang.
RemediationAI
No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.
libyang from v2.0.164 to v2.1.30 was discovered to contain a NULL pointer dereference via the function lysp_stmt_validat
In function read_yin_leaf() in libyang <= v1.0.225, it doesn't check whether the value of retval->ext[r] is NULL. Rated
In function ext_get_plugin() in libyang <= v1.0.225, it doesn't check whether the value of revision is NULL. Rated high
A stack overflow in libyang <= v1.0.225 can cause a denial of service through function lyxml_parse_mem(). Rated high sev
In function read_yin_container() in libyang <= v1.0.225, it doesn't check whether the value of retval->ext[r] is NULL. R
In all versions of libyang before 1.0-r5, a stack-based buffer overflow was discovered in the way libyang parses YANG fi
In all versions of libyang before 1.0-r5, a stack-based buffer overflow was discovered in the way libyang parses YANG fi
Heap use-after-free write in libyang before 5.2.6 enables remote authenticated attackers to crash processes or potential
libyang from v2.0.164 to v2.1.30 was discovered to contain a NULL pointer dereference via the function lys_parse_mem at
Same weakness CWE-617 – Reachable Assertion
View allSame technique Denial Of Service
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External POC / Exploit Code
Leaving vuln.today