CVE-2020-12826
Linux Kernel Signal Access-Control Bypass Vulnerability
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.
INFO
Published Date :
May 12, 2020, 7:15 p.m.
Last Modified :
July 15, 2021, 7:16 p.m.
Source :
[email protected]
Remotely Exploitable :
No
Impact Score :
3.4
Exploitability Score :
1.8
Public PoC/Exploit Available at Github
CVE-2020-12826 has a 1 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
Affected Products
The following products are affected by CVE-2020-12826
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2020-12826.
| URL | Resource |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=1822077 | Issue Tracking Patch Third Party Advisory |
| 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://lists.debian.org/debian-lts-announce/2020/06/msg00011.html | |
| https://lists.debian.org/debian-lts-announce/2020/06/msg00013.html | |
| https://lists.openwall.net/linux-kernel/2020/03/24/1803 | Exploit Mailing List Patch Third Party Advisory |
| https://security.netapp.com/advisory/ntap-20200608-0001/ | |
| https://usn.ubuntu.com/4367-1/ | Third Party Advisory |
| https://usn.ubuntu.com/4369-1/ | |
| https://usn.ubuntu.com/4391-1/ | |
| https://www.openwall.com/lists/kernel-hardening/2020/03/25/1 | Exploit Mailing List Patch Third Party Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Map Vulnerabilities into Different Layers of the Container Image
Python
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2020-12826 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2020-12826 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CPE Deprecation Remap by [email protected]
Jul. 15, 2021
Action Type Old Value New Value Changed CPE Configuration OR *cpe:2.3:a:redhat:enterprise_mrg:2.0:*:*:*:*:*:*:* OR *cpe:2.3:o:redhat:enterprise_mrg:2.0:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Jun. 22, 2020
Action Type Old Value New Value Added Reference https://usn.ubuntu.com/4391-1/ [No Types Assigned] -
CVE Modified by [email protected]
Jun. 10, 2020
Action Type Old Value New Value Added Reference https://lists.debian.org/debian-lts-announce/2020/06/msg00013.html [No Types Assigned] -
CVE Modified by [email protected]
Jun. 10, 2020
Action Type Old Value New Value Added Reference https://lists.debian.org/debian-lts-announce/2020/06/msg00011.html [No Types Assigned] -
CVE Modified by [email protected]
Jun. 08, 2020
Action Type Old Value New Value Added Reference https://security.netapp.com/advisory/ntap-20200608-0001/ [No Types Assigned] -
CVE Modified by [email protected]
May. 30, 2020
Action Type Old Value New Value Added Reference https://usn.ubuntu.com/4369-1/ [No Types Assigned] -
Modified Analysis by [email protected]
May. 28, 2020
Action Type Old Value New Value Removed CVSS V2 NIST (AV:L/AC:M/Au:N/C:C/I:C/A:C) Added CVSS V2 NIST (AV:L/AC:M/Au:N/C:P/I:P/A:P) Removed CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L Changed Reference Type https://bugzilla.redhat.com/show_bug.cgi?id=1822077 Patch, Third Party Advisory https://bugzilla.redhat.com/show_bug.cgi?id=1822077 Issue Tracking, Patch, Third Party Advisory Changed Reference Type https://usn.ubuntu.com/4367-1/ No Types Assigned https://usn.ubuntu.com/4367-1/ Third Party Advisory Changed CPE Configuration OR *cpe:2.3:a:redhat:enterprise_mrg:2.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux:5.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* OR *cpe:2.3:a:redhat:enterprise_mrg:2.0:*:*:*:*:*:*:* *cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:* *cpe:2.3:o:redhat:enterprise_linux:5.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* -
CVE Modified by [email protected]
May. 24, 2020
Action Type Old Value New Value Added Reference https://usn.ubuntu.com/4367-1/ [No Types Assigned] -
Initial Analysis by [email protected]
May. 14, 2020
Action Type Old Value New Value Added CVSS V2 NIST (AV:L/AC:M/Au:N/C:C/I:C/A:C) Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H Changed Reference Type https://bugzilla.redhat.com/show_bug.cgi?id=1822077 No Types Assigned https://bugzilla.redhat.com/show_bug.cgi?id=1822077 Patch, Third Party Advisory Changed Reference Type https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.6.5 No Types Assigned https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.6.5 Release Notes, Third Party Advisory Changed Reference Type https://github.com/torvalds/linux/commit/7395ea4e65c2a00d23185a3f63ad315756ba9cef No Types Assigned https://github.com/torvalds/linux/commit/7395ea4e65c2a00d23185a3f63ad315756ba9cef Patch, Third Party Advisory Changed Reference Type https://lists.openwall.net/linux-kernel/2020/03/24/1803 No Types Assigned https://lists.openwall.net/linux-kernel/2020/03/24/1803 Exploit, Mailing List, Patch, Third Party Advisory Changed Reference Type https://www.openwall.com/lists/kernel-hardening/2020/03/25/1 No Types Assigned https://www.openwall.com/lists/kernel-hardening/2020/03/25/1 Exploit, Mailing List, Patch, Third Party Advisory Added CWE NIST CWE-190 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions up to (excluding) 5.6.5 Added CPE Configuration OR *cpe:2.3:a:redhat:enterprise_mrg:2.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux:5.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* -
CVE Modified by [email protected]
May. 13, 2020
Action Type Old Value New Value Added Reference https://bugzilla.redhat.com/show_bug.cgi?id=1822077 [No Types Assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2020-12826 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2020-12826
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.05 }} 0.00%
score
0.18376
percentile