CVE-2021-31878
Asterisk PJSIP INVITE Without SDP Request Handler denial of service vulnerability
Description
An issue was discovered in PJSIP in Asterisk before 16.19.1 and before 18.5.1. To exploit, a re-INVITE without SDP must be received after Asterisk has sent a BYE request.
INFO
Published Date :
July 30, 2021, 2:15 p.m.
Last Modified :
Aug. 7, 2021, 2:05 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
Exploitability Score :
2.8
Public PoC/Exploit Available at Github
CVE-2021-31878 has a 1 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-2021-31878.
| URL | Resource |
|---|---|
| http://downloads.asterisk.org/pub/security/AST-2021-007.html | Patch Vendor Advisory |
| http://packetstormsecurity.com/files/163638/Asterisk-Project-Security-Advisory-AST-2021-007.html | Patch Third Party Advisory VDB Entry |
| http://seclists.org/fulldisclosure/2021/Jul/48 | Mailing List Patch Third Party Advisory |
| https://downloads.digium.com/pub/security/AST-2021-007.html | Patch Vendor Advisory |
| https://issues.asterisk.org/jira/browse/ASTERISK-29381 | Exploit Issue Tracking Vendor 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).
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The following list is the news that have been mention
CVE-2021-31878 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-31878 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 -
Initial Analysis by [email protected]
Aug. 07, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:S/C:N/I:N/A:P) Added CVSS V3.1 NIST AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Changed Reference Type http://downloads.asterisk.org/pub/security/AST-2021-007.html No Types Assigned http://downloads.asterisk.org/pub/security/AST-2021-007.html Patch, Vendor Advisory Changed Reference Type http://packetstormsecurity.com/files/163638/Asterisk-Project-Security-Advisory-AST-2021-007.html No Types Assigned http://packetstormsecurity.com/files/163638/Asterisk-Project-Security-Advisory-AST-2021-007.html Patch, Third Party Advisory, VDB Entry Changed Reference Type http://seclists.org/fulldisclosure/2021/Jul/48 No Types Assigned http://seclists.org/fulldisclosure/2021/Jul/48 Mailing List, Patch, Third Party Advisory Changed Reference Type https://downloads.digium.com/pub/security/AST-2021-007.html No Types Assigned https://downloads.digium.com/pub/security/AST-2021-007.html Patch, Vendor Advisory Changed Reference Type https://issues.asterisk.org/jira/browse/ASTERISK-29381 No Types Assigned https://issues.asterisk.org/jira/browse/ASTERISK-29381 Exploit, Issue Tracking, Vendor Advisory Added CWE NIST CWE-617 Added CPE Configuration OR *cpe:2.3:a:digium:asterisk:16.17.0:*:*:*:*:*:*:* *cpe:2.3:a:digium:asterisk:16.18.0:*:*:*:*:*:*:* *cpe:2.3:a:digium:asterisk:16.19.0:*:*:*:*:*:*:* *cpe:2.3:a:digium:asterisk:18.3.0:*:*:*:*:*:*:* *cpe:2.3:a:digium:asterisk:18.4.0:*:*:*:*:*:*:* *cpe:2.3:a:digium:asterisk:18.5.0:*:*:*:*:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-31878 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-2021-31878
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.31 }} 0.05%
score
0.65310
percentile