CVE-2021-28906 — Unchecked Return Value in Libyang

CWE-252 — Unchecked Return ValueCWE-476 — NULL Pointer Dereference5 documents5 sources
Severity
7.5HIGHNVD
EPSS
0.4%
top 41.35%
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 read_yin_leaf() in libyang 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: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

Patches

Patch: github.com ↗Patch: github.com ↗

🔴Vulnerability Details

2
GHSA
GHSA-gf49-5jg3-x68p: In function read_yin_leaf() in libyang ext[r] is NULL↗2022-05-24
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OSV
CVE-2021-28906: In function read_yin_leaf() in libyang ext[r] is NULL↗2021-05-20
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📋Vendor Advisories

2
Red Hat
libyang: NULL pointer dereference in read_yin_leaf()↗2021-03-08
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Debian
CVE-2021-28906: libyang - In function read_yin_leaf() in libyang <= v1.0.225, it doesn't check whether the...↗2021
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