CVE-2021-29626
FreeBSD Shared Memory Copy-On-Write Vulnerability
Description
In FreeBSD 13.0-STABLE before n245117, 12.2-STABLE before r369551, 11.4-STABLE before r369559, 13.0-RC5 before p1, 12.2-RELEASE before p6, and 11.4-RELEASE before p9, copy-on-write logic failed to invalidate shared memory page mappings between multiple processes allowing an unprivileged process to maintain a mapping after it is freed, allowing the process to read private data belonging to other processes or the kernel.
INFO
Published Date :
April 7, 2021, 3:15 p.m.
Last Modified :
May 27, 2022, 1:22 p.m.
Source :
[email protected]
Remotely Exploitable :
No
Impact Score :
3.6
Exploitability Score :
1.8
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-2021-29626.
| URL | Resource |
|---|---|
| https://security.FreeBSD.org/advisories/FreeBSD-SA-21:08.vm.asc | Vendor Advisory |
| https://security.netapp.com/advisory/ntap-20210423-0008/ | 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).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-29626 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-29626 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 -
Modified Analysis by [email protected]
May. 27, 2022
Action Type Old Value New Value Changed Reference Type https://security.netapp.com/advisory/ntap-20210423-0008/ No Types Assigned https://security.netapp.com/advisory/ntap-20210423-0008/ Third Party Advisory -
CVE Modified by [email protected]
Apr. 23, 2021
Action Type Old Value New Value Added Reference https://security.netapp.com/advisory/ntap-20210423-0008/ [No Types Assigned] -
CVE Modified by [email protected]
Apr. 21, 2021
Action Type Old Value New Value Changed Description In FreeBSD 13.0-STABLE before n245117, 12.2-STABLE before r369551, 11.4-STABLE before r369559, 13.0-RC5 before p1, 12.2-RELEASE before p6, and 11.4-RELEASE before p9, copy-on-write logic failed to invalidate shared memory page mappings between multiple processes allowing an unpriivleged process to maintain a mapping after it is freed, allowing the process to read private data belonging to other processes or the kernel. In FreeBSD 13.0-STABLE before n245117, 12.2-STABLE before r369551, 11.4-STABLE before r369559, 13.0-RC5 before p1, 12.2-RELEASE before p6, and 11.4-RELEASE before p9, copy-on-write logic failed to invalidate shared memory page mappings between multiple processes allowing an unprivileged process to maintain a mapping after it is freed, allowing the process to read private data belonging to other processes or the kernel. -
Initial Analysis by [email protected]
Apr. 16, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:L/AC:L/Au:N/C:P/I:N/A:N) Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N Changed Reference Type https://security.FreeBSD.org/advisories/FreeBSD-SA-21:08.vm.asc No Types Assigned https://security.FreeBSD.org/advisories/FreeBSD-SA-21:08.vm.asc Vendor Advisory Added CWE NIST CWE-416 Added CPE Configuration OR *cpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:* versions up to (excluding) 11.4 *cpe:2.3:o:freebsd:freebsd:11.4:-:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:11.4:beta1:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:11.4:p1:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:11.4:p2:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:11.4:p3:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:11.4:p4:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:11.4:p5:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:11.4:rc1:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:11.4:rc2:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:* versions from (including) 12.0 up to (excluding) 12.2 *cpe:2.3:o:freebsd:freebsd:12.2:-:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:12.2:p1:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:12.2:p2:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:13.0:beta1:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:13.0:beta2:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:13.0:beta3:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:13.0:beta4:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:13.0:rc1:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:13.0:rc2:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:13.0:rc3:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:13.0:rc4:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:13.0:rc5:*:*:*:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-29626 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-2021-29626
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.04 }} 0.00%
score
0.05635
percentile