CVE-2021-44538
"libolm Matrix Buffer Overflow Vulnerability"
Description
The olm_session_describe function in Matrix libolm before 3.2.7 is vulnerable to a buffer overflow. The Olm session object represents a cryptographic channel between two parties. Therefore, its state is partially controllable by the remote party of the channel. Attackers can construct a crafted sequence of messages to manipulate the state of the receiver's session in such a way that, for some buffer sizes, a buffer overflow happens on a call to olm_session_describe. Furthermore, safe buffer sizes were undocumented. The overflow content is partially controllable by the attacker and limited to ASCII spaces and digits. The known affected products are Element Web And SchildiChat Web.
INFO
Published Date :
Dec. 14, 2021, 2:15 p.m.
Last Modified :
Aug. 8, 2023, 2:22 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
5.9
Exploitability Score :
3.9
Public PoC/Exploit Available at Github
CVE-2021-44538 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-2021-44538
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-2021-44538.
| URL | Resource |
|---|---|
| https://gitlab.matrix.org/matrix-org/olm/-/tags | Product Third Party Advisory |
| https://lists.debian.org/debian-lts-announce/2022/01/msg00001.html | Mailing List Third Party Advisory |
| https://matrix.org/blog/2021/12/13/disclosure-buffer-overflow-in-libolm-and-matrix-js-sdk | Patch Vendor Advisory |
| https://www.debian.org/security/2022/dsa-5034 | 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).
None
CMake Makefile Ruby Swift Java C++ C Python Nix Shell
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-44538 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-44538 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 -
CWE Remap by [email protected]
Aug. 08, 2023
Action Type Old Value New Value Changed CWE CWE-120 CWE-119 -
Modified Analysis by [email protected]
Apr. 12, 2022
Action Type Old Value New Value Changed Reference Type https://lists.debian.org/debian-lts-announce/2022/01/msg00001.html No Types Assigned https://lists.debian.org/debian-lts-announce/2022/01/msg00001.html Mailing List, Third Party Advisory Changed Reference Type https://www.debian.org/security/2022/dsa-5034 No Types Assigned https://www.debian.org/security/2022/dsa-5034 Third Party Advisory Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* *cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* *cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Jan. 04, 2022
Action Type Old Value New Value Added Reference https://lists.debian.org/debian-lts-announce/2022/01/msg00001.html [No Types Assigned] -
CVE Modified by [email protected]
Jan. 03, 2022
Action Type Old Value New Value Added Reference https://www.debian.org/security/2022/dsa-5034 [No Types Assigned] -
Initial Analysis by [email protected]
Dec. 21, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:P/I:P/A:P) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Changed Reference Type https://gitlab.matrix.org/matrix-org/olm/-/tags No Types Assigned https://gitlab.matrix.org/matrix-org/olm/-/tags Product, Third Party Advisory Changed Reference Type https://matrix.org/blog/2021/12/13/disclosure-buffer-overflow-in-libolm-and-matrix-js-sdk No Types Assigned https://matrix.org/blog/2021/12/13/disclosure-buffer-overflow-in-libolm-and-matrix-js-sdk Patch, Vendor Advisory Added CWE NIST CWE-120 Added CPE Configuration OR *cpe:2.3:a:matrix:element:*:*:*:*:desktop:*:*:* versions up to (excluding) 1.9.7 *cpe:2.3:a:matrix:element:*:*:*:*:web:*:*:* versions up to (excluding) 1.9.7 *cpe:2.3:a:matrix:javascript_sdk:*:*:*:*:*:*:*:* versions from (including) 2.4.2 up to (excluding) 15.2.1 *cpe:2.3:a:matrix:olm:*:*:*:*:*:*:*:* versions from (including) 3.1.4 up to (excluding) 3.2.8 Added CPE Configuration OR *cpe:2.3:a:schildi:schildichat:*:*:*:*:desktop:*:*:* versions up to (excluding) 1.9.7-sc1 *cpe:2.3:a:schildi:schildichat:*:*:*:*:web:*:*:* versions up to (excluding) 1.9.7-sc1 Added CPE Configuration OR *cpe:2.3:a:cinny_project:cinny:*:*:*:*:*:*:*:* versions up to (excluding) 1.6.0
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-44538 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-2021-44538
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.78 }} 0.07%
score
0.81742
percentile