CVE Vulnerabilities

CVE-2021-28903

Uncontrolled Recursion

Published: May 20, 2021 | Modified: Apr 05, 2022
CVSS 3.x
7.5
HIGH
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.x
5 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P
RedHat/V2
RedHat/V3
7.5 MODERATE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Ubuntu
LOW

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.

Weakness

The product does not properly control the amount of recursion that takes place, consuming excessive resources, such as allocated memory or the program stack.

Affected Software

Name Vendor Start Version End Version
Libyang Cesnet * 1.0.225 (including)
Libyang Ubuntu esm-apps/focal *
Libyang Ubuntu esm-apps/jammy *
Libyang Ubuntu focal *
Libyang Ubuntu groovy *
Libyang Ubuntu hirsute *
Libyang Ubuntu impish *
Libyang Ubuntu jammy *
Libyang Ubuntu kinetic *
Libyang Ubuntu trusty *
Libyang Ubuntu upstream *
Libyang Ubuntu xenial *

Potential Mitigations

References