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RHEL 8 : libsepol (RHSA-2021:4513)

low Nessus Plugin ID 155202

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Synopsis

The remote Red Hat host is missing one or more security updates for libsepol.

Description

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2021:4513 advisory.

 The libsepol library provides an API for the manipulation of SELinux binary policies. It is used by checkpolicy (the policy compiler) and similar tools, as well as by programs like load_policy that need to perform specific transformations on binary policies (for example, customizing policy boolean settings).

 Security Fix(es):

 * libsepol: use-after-free in __cil_verify_classperms() (CVE-2021-36084)

 * libsepol: use-after-free in __cil_verify_classperms() (CVE-2021-36085)

 * libsepol: use-after-free in cil_reset_classpermission() (CVE-2021-36086)

 * libsepol: heap-based buffer overflow in ebitmap_match_any() (CVE-2021-36087)

 For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

 Additional Changes:

 For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.5 Release Notes linked from the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update the RHEL libsepol package based on the guidance in RHSA-2021:4513.

See Also

http://www.nessus.org/u?0497e78f

http://www.nessus.org/u?7240878e

https://access.redhat.com/security/updates/classification/#moderate

https://access.redhat.com/errata/RHSA-2021:4513

https://bugzilla.redhat.com/show_bug.cgi?id=1979662

https://bugzilla.redhat.com/show_bug.cgi?id=1979664

https://bugzilla.redhat.com/show_bug.cgi?id=1979666

https://bugzilla.redhat.com/show_bug.cgi?id=1979668

Plugin Details

Severity: Low

ID: 155202

File Name: redhat-RHSA-2021-4513.nasl

Version: 1.10

Type: local

Agent: unix

Published: 11/11/2021

Updated: 11/7/2024

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

Risk Information

VPR

Risk Factor: Low

Score: 2.2

Vendor

Vendor Severity: Moderate

CVSS v2

Risk Factor: Low

Base Score: 2.1

Temporal Score: 1.6

Vector: CVSS2#AV:L/AC:L/Au:N/C:N/I:N/A:P

CVSS Score Source: CVE-2021-36087

CVSS v3

Risk Factor: Low

Base Score: 3.3

Temporal Score: 3

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:libsepol-static, p-cpe:/a:redhat:enterprise_linux:libsepol, cpe:/o:redhat:enterprise_linux:8, p-cpe:/a:redhat:enterprise_linux:libsepol-devel

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 11/9/2021

Vulnerability Publication Date: 7/1/2021

Reference Information

CVE: CVE-2021-36084, CVE-2021-36085, CVE-2021-36086, CVE-2021-36087

CWE: 119, 416

RHSA: 2021:4513