Detections
Analytics
Linux Distros Unpatched Vulnerability : CVE-2021-28903
high Nessus Plugin ID 223737
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Synopsis
The Linux/Unix host has one or more packages installed with a vulnerability that the vendor indicates will not be patched.Description
The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.- 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.
(CVE-2021-28903)
Note that Nessus relies on the presence of the package as reported by the vendor.
Solution
There is no known solution at this time.See Also
https://access.redhat.com/security/cve/cve-2021-28903
Plugin Details
Severity: High
ID: 223737
File Name: unpatched_CVE_2021_28903.nasl
Version: 1.4
Type: local
Agent: unix
Family: Misc.
Published: 3/4/2025
Updated: 9/14/2025
Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 6.6
CVSS v2
Risk Factor: Medium
Base Score: 5
Temporal Score: 4.4
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P
CVSS Score Source: CVE-2021-28903
CVSS v3
Risk Factor: High
Base Score: 7.5
Temporal Score: 7.2
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Temporal Vector: CVSS:3.0/E:H/RL:O/RC:C
Vulnerability Information
CPE: cpe:/o:centos:centos:8, cpe:/o:canonical:ubuntu_linux:22.04:-:lts, cpe:/o:debian:debian_linux:11.0, p-cpe:/a:canonical:ubuntu_linux:libyang, p-cpe:/a:debian:debian_linux:libyang, cpe:/o:redhat:enterprise_linux:8, p-cpe:/a:redhat:enterprise_linux:libyang, p-cpe:/a:centos:centos:libyang, cpe:/o:canonical:ubuntu_linux:20.04:-:lts
Required KB Items: Host/local_checks_enabled, Host/cpu, global_settings/vendor_unpatched, Host/OS/identifier
Exploit Available: true
Exploit Ease: Exploits are available
Vulnerability Publication Date: 5/20/2021
Reference Information
CVE: CVE-2021-28903