CVE-2021-46837
Sangoma Asterisk T.38 Crash
Description
res_pjsip_t38 in Sangoma Asterisk 16.x before 16.16.2, 17.x before 17.9.3, and 18.x before 18.2.2, and Certified Asterisk before 16.8-cert7, allows an attacker to trigger a crash by sending an m=image line and zero port in a response to a T.38 re-invite initiated by Asterisk. This is a re-occurrence of the CVE-2019-15297 symptoms but not for exactly the same reason. The crash occurs because there is an append operation relative to the active topology, but this should instead be a replace operation.
INFO
Published Date :
Aug. 30, 2022, 7:15 a.m.
Last Modified :
Jan. 28, 2023, 1:20 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
Exploitability Score :
2.8
Affected Products
The following products are affected by CVE-2021-46837
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-2021-46837.
| URL | Resource |
|---|---|
| https://downloads.asterisk.org/pub/security/AST-2021-006.html | Vendor Advisory |
| https://lists.debian.org/debian-lts-announce/2022/11/msg00021.html | Mailing List Third Party Advisory |
| https://www.debian.org/security/2022/dsa-5285 | 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-2021-46837 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-46837 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]
Jan. 28, 2023
Action Type Old Value New Value Changed Reference Type https://lists.debian.org/debian-lts-announce/2022/11/msg00021.html No Types Assigned https://lists.debian.org/debian-lts-announce/2022/11/msg00021.html Mailing List, Third Party Advisory Changed Reference Type https://www.debian.org/security/2022/dsa-5285 No Types Assigned https://www.debian.org/security/2022/dsa-5285 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]
Nov. 18, 2022
Action Type Old Value New Value Added Reference https://www.debian.org/security/2022/dsa-5285 [No Types Assigned] -
CVE Modified by [email protected]
Nov. 17, 2022
Action Type Old Value New Value Added Reference https://lists.debian.org/debian-lts-announce/2022/11/msg00021.html [No Types Assigned] -
Initial Analysis by [email protected]
Sep. 06, 2022
Action Type Old Value New Value Added CVSS V3.1 NIST AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Changed Reference Type https://downloads.asterisk.org/pub/security/AST-2021-006.html No Types Assigned https://downloads.asterisk.org/pub/security/AST-2021-006.html Vendor Advisory Added CWE NIST CWE-476 Added CPE Configuration OR *cpe:2.3:a:asterisk:certified_asterisk:16.8.0:-:*:*:*:*:*:* *cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert1:*:*:*:*:*:* *cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert2:*:*:*:*:*:* *cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert3:*:*:*:*:*:* *cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert4:*:*:*:*:*:* *cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert5:*:*:*:*:*:* *cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert6:*:*:*:*:*:* *cpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:* versions from (including) 16.0.0 up to (excluding) 16.16.2 *cpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:* versions from (including) 17.0.0 up to (excluding) 17.9.3 *cpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:* versions from (including) 18.0.0 up to (excluding) 18.2.2
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-46837 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-2021-46837
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.11 }} -0.02%
score
0.44299
percentile