CVE-2021-28904 — Unchecked Return Value in Libyang

CWE-252 — Unchecked Return ValueCWE-476 — NULL Pointer Dereference5 documents5 sources
Severity
7.5HIGHNVD
EPSS
0.4%
top 38.95%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
Cesnet LibyangDebian LibyangDebian Libyang2
Timeline
PublishedMay 20
Latest updateMay 24

Description

In function ext_get_plugin() in libyang <= v1.0.225, it doesn't check whether the value of revision is NULL. If revision is NULL, the operation of strcmp(revision, ext_plugins[u].revision) will lead to a crash.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitability: 3.9 | Impact: 3.6

Affected Packages4 packages

▶debiandebian/libyang< libyang 3.4.2+dfsg-2 (forky)
▶debiandebian/libyang2< libyang 3.4.2+dfsg-2 (forky)
▶Debiancesnet/libyang< 3.4.2+dfsg-2+1
▶NVDcesnet/libyang1.0.225

🔴Vulnerability Details

2
GHSA
GHSA-wqxj-4m27-ccp4: In function ext_get_plugin() in libyang <= v1↗2022-05-24
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OSV
CVE-2021-28904: In function ext_get_plugin() in libyang <= v1↗2021-05-20
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📋Vendor Advisories

2
Red Hat
libyang: NULL pointer dereference in ext_get_plugin()↗2021-03-07
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Debian
CVE-2021-28904: libyang - In function ext_get_plugin() in libyang <= v1.0.225, it doesn't check whether th...↗2021
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