Ubuntu.comUB:CVE-2021-36087CVE-2021-36087
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:L/AC:L/Au:N/C:N/I:N/A:P
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
EPSS
Percentile
30.7%
The CIL compiler in SELinux 3.2 has a heap-based buffer over-read in
ebitmap_match_any (called indirectly from cil_check_neverallow). This
occurs because there is sometimes a lack of checks for invalid statements
in an optional block.
Bugs
- <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=990526>
- <https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=32675>
Notes
| Author | Note |
|---|---|
| sbeattie | AppArmor is the default LSM in Ubuntu, issue only affects compilation of selinux policy trusty version predates the introduction of CIL |
Related
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:L/AC:L/Au:N/C:N/I:N/A:P
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
EPSS
Percentile
30.7%