Detections
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RHEL 8 : libyang (Unpatched Vulnerability)

high Nessus Plugin ID 199463

Synopsis

The remote Red Hat 8 host is affected by multiple vulnerabilities that will not be patched.

Description

The remote Redhat Enterprise Linux 8 host has one or more packages installed that are affected by multiple vulnerabilities that have been acknowledged by the vendor but will not be patched.

 - libyang: NULL pointer dereference in read_yin_leaf() (CVE-2021-28906)

 - libyang: NULL pointer dereference via lysp_stmt_validate_value at lys_parse_mem.c (CVE-2023-26917)

 - In function read_yin_container() in libyang <= v1.0.225, it doesn't check whether the value of retval->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. (CVE-2021-28902)

Note that Nessus has not tested for these issues but has instead relied on the package manager's report that the package is installed.

Solution

The vendor has acknowledged the vulnerabilities but no solution has been provided. Refer to the vendor for remediation guidance.

Plugin Details

Severity: High

ID: 199463

File Name: redhat_unpatched_libyang-rhel8.nasl

Version: 1.2

Type: local

Agent: unix

Published: 6/3/2024

Updated: 6/4/2024

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, 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-2021-28906

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

CVSS Score Source: CVE-2023-26917

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:libyang, cpe:/o:redhat:enterprise_linux:8

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu

Exploit Available: true

Exploit Ease: Exploits are available

Vulnerability Publication Date: 5/20/2021

Reference Information

CVE: CVE-2021-28902, CVE-2021-28903, CVE-2021-28904, CVE-2021-28905, CVE-2021-28906, CVE-2023-26917