CVE-2021-28903 — Uncontrolled Recursion in Libyang

CWE-674 — Uncontrolled Recursion5 documents5 sources
Severity
7.5HIGHNVD
EPSS
0.7%
top 27.41%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
Cesnet LibyangDebian LibyangDebian Libyang2
Timeline
PublishedMay 20
Latest updateMay 24

Description

A stack overflow in libyang <= v1.0.225 can cause a denial of service through function lyxml_parse_mem(). lyxml_parse_elem() function will be called recursively, which will consume stack space and lead to 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-vr34-263x-7q3r: A stack overflow in libyang <= v1↗2022-05-24
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OSV
CVE-2021-28903: A stack overflow in libyang <= v1↗2021-05-20
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📋Vendor Advisories

2
Red Hat
libyang: recursive call to lyxml_parse_mem() lead to crash↗2021-03-08
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Debian
CVE-2021-28903: libyang - A stack overflow in libyang <= v1.0.225 can cause a denial of service through fu...↗2021
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