CVE-2019-20395 — Uncontrolled Recursion in Libyang

CWE-674 — Uncontrolled Recursion7 documents6 sources
Severity
6.5MEDIUMNVD
EPSS
0.2%
top 57.35%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Cesnet LibyangDebian Libyang
Timeline
PublishedJan 22
Latest updateMay 24

Description

A stack consumption issue is present in libyang before v1.0-r1 due to the self-referential union type containing leafrefs. Applications that use libyang to parse untrusted input yang files may crash.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:HExploitability: 2.8 | Impact: 3.6

Affected Packages3 packages

▶debiandebian/libyang< libyang 1.0.176-1 (bullseye)
▶Debiancesnet/libyang< 1.0.176-1+2
▶NVDcesnet/libyang6 versions+5

🔴Vulnerability Details

2
GHSA
GHSA-3ffh-3h59-484g: A stack consumption issue is present in libyang before v1↗2022-05-24
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OSV
CVE-2019-20395: A stack consumption issue is present in libyang before v1↗2020-01-22
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📋Vendor Advisories

2
Red Hat
libyang: stack-overflow when parsing yang files with self-referential union types↗2019-03-08
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Debian
CVE-2019-20395: libyang - A stack consumption issue is present in libyang before v1.0-r1 due to the self-r...↗2019
▶

💬Community

2
Bugzilla
CVE-2019-20395 libyang: stack-overflow when parsing yang files with self-referential union types [fedora-all]↗2020-02-03
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Bugzilla
CVE-2019-20395 libyang: stack-overflow when parsing yang files with self-referential union types↗2020-01-22
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