Low severity · published Jul 1, 2021
CVE-2021-36084
The CIL compiler in SELinux 3.2 has a use-after-free in __cil_verify_classperms (called from __cil_verify_classpermission and __cil_pre_verify_helper)
3.3
CVSS
0.5%
EPSS
No
On KEV
Description
The CIL compiler in SELinux 3.2 has a use-after-free in __cil_verify_classperms (called from __cil_verify_classpermission and __cil_pre_verify_helper).
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
None
Integrity
None
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 40% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FE
Fedora · Fedoraproject
35 · source: NVD
SE
Selinux · Selinux Project
3.2 · source: NVD
RR
RUGGEDCOM ROX MX5000 · Siemens
before V2.17.0 · source: CISA
RR
RUGGEDCOM ROX MX5000RE · Siemens
before V2.17.0 · source: CISA
RR
RUGGEDCOM ROX RX1400 · Siemens
before V2.17.0 · source: CISA
RR
RUGGEDCOM ROX RX1500 · Siemens
before V2.17.0 · source: CISA
RR
RUGGEDCOM ROX RX1501 · Siemens
before V2.17.0 · source: CISA
RR
RUGGEDCOM ROX RX1510 · Siemens
before V2.17.0 · source: CISA
RR
RUGGEDCOM ROX RX1511 · Siemens
before V2.17.0 · source: CISA
RR
RUGGEDCOM ROX RX1512 · Siemens
before V2.17.0 · source: CISA
RR
RUGGEDCOM ROX RX1524 · Siemens
before V2.17.0 · source: CISA
RR
RUGGEDCOM ROX RX1536 · Siemens
before V2.17.0 · source: CISA
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-36084
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-36084
Exploit
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=31065
Patch
https://github.com/SELinuxProject/selinux/commit/f34d3d30c8325e4847a6b696fe7a3936a8a361f3
Third Party Advisory
https://github.com/google/oss-fuzz-vulns/blob/main/vulns/selinux/OSV-2021-417.yaml
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U7ZYR3PIJ75N6U2IONJWCKZ5L2NKJTGR/
lists.debian.org
https://lists.debian.org/debian-lts-announce/2024/10/msg00021.html
security.netapp.com
https://security.netapp.com/advisory/ntap-20250207-0004/
More from Fedora
10.0
CVE-2021-44228
Apache Log4j2 JNDI features do not protect against attacker controlled LDAP and other JNDI related endpoints
10.0
CVE-2015-3306
ProFTPD Improper Access Control Vulnerability
9.8
CVE-2024-4577
Argument Injection in PHP-CGI
9.8
CVE-2021-44026
Roundcube Webmail SQL Injection Vulnerability
9.8
CVE-2021-42013
Path Traversal and Remote Code Execution in Apache HTTP Server 2.4.49 and 2.4.50 (incomplete fix of CVE-2021-41773)