CVE-2021-36087
CVSS V2 Low 2.1
CVSS V3 Low 3.3
Description
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.
Overview
- CVE ID
- CVE-2021-36087
- Assigner
- cve@mitre.org
- Vulnerability Status
- Analyzed
- Published Version
- 2021-07-01T03:15:08
- Last Modified Date
- 2021-11-17T14:05:01
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:o:selinux_project:selinux:3.2:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* | 1 | OR |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:L/AC:L/Au:N/C:N/I:N/A:P
- Access Vector
- LOCAL
- Access Compatibility
- LOW
- Authentication
- NONE
- Confidentiality Impact
- NONE
- Integrity Impact
- NONE
- Availability Impact
- PARTIAL
- Base Score
- 2.1
- Severity
- LOW
- Exploitability Score
- 3.9
- Impact Score
- 2.9
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
- Attack Vector
- LOCAL
- Attack Compatibility
- LOW
- Privileges Required
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- NONE
- Availability Impact
- LOW
- Base Score
- 3.3
- Base Severity
- LOW
- Exploitability Score
- 1.8
- Impact Score
- 1.4
References
| Reference URL | Reference Tags |
|---|---|
| https://github.com/google/oss-fuzz-vulns/blob/main/vulns/selinux/OSV-2021-585.yaml | Third Party Advisory |
| https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=32675 | Exploit Issue Tracking Patch Third Party Advisory |
| https://lore.kernel.org/selinux/CAEN2sdqJKHvDzPnxS-J8grU8fSf32DDtx=kyh84OsCq_Vm+yaQ@mail.gmail.com/T/ | Mailing List Third Party Advisory |
| https://github.com/SELinuxProject/selinux/commit/340f0eb7f3673e8aacaf0a96cbfcd4d12a405521 | Patch Third Party Advisory |
| https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/U7ZYR3PIJ75N6U2IONJWCKZ5L2NKJTGR/ | Mailing List Third Party Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2021-36087 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36087 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 06:46:36 | Added to TrackCVE | |||
| 2022-12-05 05:18:39 | 2021-07-01T03:15Z | 2021-07-01T03:15:08 | CVE Published Date | updated |
| 2022-12-05 05:18:39 | 2021-11-17T14:05:01 | CVE Modified Date | updated | |
| 2022-12-05 05:18:39 | Analyzed | Vulnerability Status | updated |