CVE-2021-33624
Linux BPF Type Confusion Memory Disclosure
Description
In kernel/bpf/verifier.c in the Linux kernel before 5.12.13, a branch can be mispredicted (e.g., because of type confusion) and consequently an unprivileged BPF program can read arbitrary memory locations via a side-channel attack, aka CID-9183671af6db.
INFO
Published Date :
June 23, 2021, 4:15 p.m.
Last Modified :
Nov. 21, 2024, 6:09 a.m.
Source :
[email protected]
Remotely Exploitable :
No
Impact Score :
3.6
Exploitability Score :
1.0
Public PoC/Exploit Available at Github
CVE-2021-33624 has a 7 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
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-2021-33624.
| URL | Resource |
|---|---|
| http://www.openwall.com/lists/oss-security/2021/06/21/1 | Exploit Mailing List Third Party Advisory |
| https://github.com/torvalds/linux/commit/9183671af6dbf60a1219371d4ed73e23f43b49db | Patch Third Party Advisory |
| https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html | Issue Tracking Third Party Advisory |
| https://www.usenix.org/conference/usenixsecurity21/presentation/kirzner | Third Party Advisory |
| http://www.openwall.com/lists/oss-security/2021/06/21/1 | Exploit Mailing List Third Party Advisory |
| https://github.com/torvalds/linux/commit/9183671af6dbf60a1219371d4ed73e23f43b49db | Patch Third Party Advisory |
| https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html | Issue Tracking Third Party Advisory |
| https://www.usenix.org/conference/usenixsecurity21/presentation/kirzner | 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).
All CVE - PoC in GitHub
poc proofofconcept tester allcve cvegithub cvenew cvepoc cveupdate
None
None
Map Vulnerabilities into Different Layers of the Container Image
Python
None
Proof of Concept for CVE-2021-33624
C
Automatic monitor github cve using Github Actions
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-2021-33624 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-33624 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 af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference http://www.openwall.com/lists/oss-security/2021/06/21/1 Added Reference https://github.com/torvalds/linux/commit/9183671af6dbf60a1219371d4ed73e23f43b49db Added Reference https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html Added Reference https://www.usenix.org/conference/usenixsecurity21/presentation/kirzner -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CWE Remap by [email protected]
Aug. 08, 2023
Action Type Old Value New Value Changed CWE CWE-203 CWE-843 -
Modified Analysis by [email protected]
Nov. 12, 2021
Action Type Old Value New Value Changed Reference Type https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html No Types Assigned https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html Issue Tracking, Third Party Advisory Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Oct. 16, 2021
Action Type Old Value New Value Added Reference https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html [No Types Assigned] -
Initial Analysis by [email protected]
Jul. 06, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:L/AC:M/Au:N/C:C/I:N/A:N) Added CVSS V3.1 NIST AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N Changed Reference Type http://www.openwall.com/lists/oss-security/2021/06/21/1 No Types Assigned http://www.openwall.com/lists/oss-security/2021/06/21/1 Exploit, Mailing List, Third Party Advisory Changed Reference Type https://github.com/torvalds/linux/commit/9183671af6dbf60a1219371d4ed73e23f43b49db No Types Assigned https://github.com/torvalds/linux/commit/9183671af6dbf60a1219371d4ed73e23f43b49db Patch, Third Party Advisory Changed Reference Type https://www.usenix.org/conference/usenixsecurity21/presentation/kirzner No Types Assigned https://www.usenix.org/conference/usenixsecurity21/presentation/kirzner Third Party Advisory Added CWE NIST CWE-203 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions up to (excluding) 5.12.13
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-33624 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-2021-33624
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.09 }} 0.01%
score
0.23209
percentile