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MitreCVE-2021-36087

HistoryJul 01, 2021 - 3:15 a.m.

CVE-2021-36087

2021-07-0103:15:08

CWE-125

mitre

web.nvd.nist.gov

157

cve-2021-36087

cil compiler

selinux

heap-based buffer over-read

ebitmap_match_any

cil_check_neverallow

nvd

CVSS2

2.1

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

3.3

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

AI Score

4.1

Confidence

High

EPSS

0.001

Percentile

30.7%

JSON

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.

Affected configurations

Nvd

Node

selinux_projectselinuxMatch3.2

Node

fedoraprojectfedoraMatch35

VendorProductVersionCPE
selinux_projectselinux3.2cpe:2.3:o:selinux_project:selinux:3.2:*:*:*:*:*:*:*
fedoraprojectfedora35cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*