CVE-2020-12826
CVSS V2 Medium 4.4
CVSS V3 Medium 5.3
Description
A signal access-control issue was discovered in the Linux kernel before 5.6.5, aka CID-7395ea4e65c2. Because exec_id in include/linux/sched.h is only 32 bits, an integer overflow can interfere with a do_notify_parent protection mechanism. A child process can send an arbitrary signal to a parent process in a different security domain. Exploitation limitations include the amount of elapsed time before an integer overflow occurs, and the lack of scenarios where signals to a parent process present a substantial operational threat.
Overview
- CVE ID
- CVE-2020-12826
- Assigner
- cve@mitre.org
- Vulnerability Status
- Modified
- Published Version
- 2020-05-12T19:15:11
- Last Modified Date
- 2021-07-15T19:16:09
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 1 | OR | 5.6.5 | |
| cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:* | 1 | OR | ||
| cpe:2.3:o:redhat:enterprise_linux:5.0:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:redhat:enterprise_mrg:2.0:*:*:*:*:*:*:* | 1 | OR |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:L/AC:M/Au:N/C:P/I:P/A:P
- Access Vector
- LOCAL
- Access Compatibility
- MEDIUM
- Authentication
- NONE
- Confidentiality Impact
- PARTIAL
- Integrity Impact
- PARTIAL
- Availability Impact
- PARTIAL
- Base Score
- 4.4
- Severity
- MEDIUM
- Exploitability Score
- 3.4
- Impact Score
- 6.4
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
- Attack Vector
- LOCAL
- Attack Compatibility
- LOW
- Privileges Required
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- LOW
- Availability Impact
- LOW
- Base Score
- 5.3
- Base Severity
- MEDIUM
- Exploitability Score
- 1.8
- Impact Score
- 3.4
References
| Reference URL | Reference Tags |
|---|---|
| https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.6.5 | Release Notes Third Party Advisory |
| https://github.com/torvalds/linux/commit/7395ea4e65c2a00d23185a3f63ad315756ba9cef | Patch Third Party Advisory |
| https://www.openwall.com/lists/kernel-hardening/2020/03/25/1 | Exploit Mailing List Patch Third Party Advisory |
| https://lists.openwall.net/linux-kernel/2020/03/24/1803 | Exploit Mailing List Patch Third Party Advisory |
| https://bugzilla.redhat.com/show_bug.cgi?id=1822077 | Issue Tracking Patch Third Party Advisory |
| https://usn.ubuntu.com/4367-1/ | Third Party Advisory |
| https://usn.ubuntu.com/4369-1/ | |
| https://security.netapp.com/advisory/ntap-20200608-0001/ | |
| https://lists.debian.org/debian-lts-announce/2020/06/msg00011.html | |
| https://lists.debian.org/debian-lts-announce/2020/06/msg00013.html | |
| https://usn.ubuntu.com/4391-1/ |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2020-12826 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-12826 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 07:07:04 | Added to TrackCVE | |||
| 2022-12-04 16:26:35 | 2020-05-12T19:15Z | 2020-05-12T19:15:11 | CVE Published Date | updated |
| 2022-12-04 16:26:35 | 2021-07-15T19:16:09 | CVE Modified Date | updated | |
| 2022-12-04 16:26:35 | Modified | Vulnerability Status | updated |