Detections
Analytics
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.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.- libsepol: use-after-free in __cil_verify_classperms() (CVE-2021-36084, CVE-2021-36085)
- The CIL compiler in SELinux 3.2 has a use-after-free in cil_reset_classpermission (called from cil_reset_classperms_set and cil_reset_classperms_list). (CVE-2021-36086)
- libsepol: heap-based buffer overflow in ebitmap_match_any() (CVE-2021-36087)
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 affected libsepol, libsepol-devel and / or libsepol-static packages.See Also
https://access.redhat.com/security/cve/CVE-2021-36084
https://access.redhat.com/security/cve/CVE-2021-36085
https://access.redhat.com/security/cve/CVE-2021-36086
https://access.redhat.com/security/cve/CVE-2021-36087
https://access.redhat.com/errata/RHSA-2021:4513
https://bugzilla.redhat.com/1979662
Plugin Details
Severity: Low
ID: 155202
File Name: redhat-RHSA-2021-4513.nasl
Version: 1.7
Type: local
Agent: unix
Family: Red Hat Local Security Checks
Published: 11/11/2021
Updated: 11/24/2023
Supported Sensors: Agentless Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: Low
Score: 2.2
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: cpe:/o:redhat:enterprise_linux:8, cpe:/o:redhat:rhel_aus:8.6, cpe:/o:redhat:rhel_e4s:8.6, cpe:/o:redhat:rhel_eus:8.6, cpe:/o:redhat:rhel_tus:8.6, p-cpe:/a:redhat:enterprise_linux:libsepol, p-cpe:/a:redhat:enterprise_linux:libsepol-devel, p-cpe:/a:redhat:enterprise_linux:libsepol-static
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