CVE-2020-28327
Asterisk TCP/TLS SIP Invite Dialog Crash
Description
A res_pjsip_session crash was discovered in Asterisk Open Source 13.x before 13.37.1, 16.x before 16.14.1, 17.x before 17.8.1, and 18.x before 18.0.1. and Certified Asterisk before 16.8-cert5. Upon receiving a new SIP Invite, Asterisk did not return the created dialog locked or referenced. This caused a gap between the creation of the dialog object, and its next use by the thread that created it. Depending on some off-nominal circumstances and timing, it was possible for another thread to free said dialog in this gap. Asterisk could then crash when the dialog object, or any of its dependent objects, were dereferenced or accessed next by the initial-creation thread. Note, however, that this crash can only occur when using a connection-oriented protocol (e.g., TCP or TLS, but not UDP) for SIP transport. Also, the remote client must be authenticated, or Asterisk must be configured for anonymous calling.
INFO
Published Date :
Nov. 6, 2020, 7:15 p.m.
Last Modified :
Aug. 15, 2024, 12:44 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
Exploitability Score :
1.6
Affected Products
The following products are affected by CVE-2020-28327
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-2020-28327.
| URL | Resource |
|---|---|
| http://downloads.asterisk.org/pub/security/AST-2020-001.html | Patch Vendor Advisory |
| https://issues.asterisk.org/jira/browse/ASTERISK-29057 | 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).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2020-28327 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2020-28327 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.
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CPE Deprecation Remap by [email protected]
Aug. 15, 2024
Action Type Old Value New Value Changed CPE Configuration OR *cpe:2.3:a:asterisk:open_source:*:*:*:*:*:*:*:* versions from (including) 16.0.0 from (excluding) 16.14.1 OR *cpe:2.3:a:sangoma:asterisk:*:*:*:*:*:*:*:* versions from (including) 16.0.0 from (excluding) 16.14.1 -
CPE Deprecation Remap by [email protected]
Aug. 15, 2024
Action Type Old Value New Value Changed CPE Configuration OR *cpe:2.3:a:asterisk:open_source:*:*:*:*:*:*:*:* versions from (including) 13.0.0 from (excluding) 13.37.1 OR *cpe:2.3:a:sangoma:asterisk:*:*:*:*:*:*:*:* versions from (including) 13.0.0 from (excluding) 13.37.1 -
CPE Deprecation Remap by [email protected]
Aug. 15, 2024
Action Type Old Value New Value Changed CPE Configuration OR *cpe:2.3:a:asterisk:open_source:*:*:*:*:*:*:*:* versions from (including) 18.0.0 from (excluding) 18.0.1 OR *cpe:2.3:a:sangoma:asterisk:*:*:*:*:*:*:*:* versions from (including) 18.0.0 from (excluding) 18.0.1 -
CPE Deprecation Remap by [email protected]
Aug. 15, 2024
Action Type Old Value New Value Changed CPE Configuration OR *cpe:2.3:a:asterisk:open_source:*:*:*:*:*:*:*:* versions from (including) 17.0.0 from (excluding) 17.8.1 OR *cpe:2.3:a:sangoma:asterisk:*:*:*:*:*:*:*:* versions from (including) 17.0.0 from (excluding) 17.8.1 -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Initial Analysis by [email protected]
Nov. 20, 2020
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:H/Au:S/C:N/I:N/A:P) Added CVSS V3.1 NIST AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H Changed Reference Type http://downloads.asterisk.org/pub/security/AST-2020-001.html No Types Assigned http://downloads.asterisk.org/pub/security/AST-2020-001.html Patch, Vendor Advisory Changed Reference Type https://issues.asterisk.org/jira/browse/ASTERISK-29057 No Types Assigned https://issues.asterisk.org/jira/browse/ASTERISK-29057 Exploit, Issue Tracking, Vendor Advisory Added CWE NIST CWE-404 Added CPE Configuration OR *cpe:2.3:a:asterisk:open_source:*:*:*:*:*:*:*:* versions from (including) 13.0.0 up to (excluding) 13.37.1 *cpe:2.3:a:asterisk:open_source:*:*:*:*:*:*:*:* versions from (including) 16.0.0 up to (excluding) 16.14.1 *cpe:2.3:a:asterisk:open_source:*:*:*:*:*:*:*:* versions from (including) 17.0.0 up to (excluding) 17.8.1 *cpe:2.3:a:asterisk:open_source:*:*:*:*:*:*:*:* versions from (including) 18.0.0 up to (excluding) 18.0.1 *cpe:2.3:a:digium:certified_asterisk:16.8:-:*:*:*:*:*:* *cpe:2.3:a:digium:certified_asterisk:16.8:cert1-rc1:*:*:*:*:*:* *cpe:2.3:a:digium:certified_asterisk:16.8:cert1-rc2:*:*:*:*:*:* *cpe:2.3:a:digium:certified_asterisk:16.8:cert1-rc3:*:*:*:*:*:* *cpe:2.3:a:digium:certified_asterisk:16.8:cert1-rc4:*:*:*:*:*:* *cpe:2.3:a:digium:certified_asterisk:16.8:cert2:*:*:*:*:*:* *cpe:2.3:a:digium:certified_asterisk:16.8:cert3:*:*:*:*:*:* *cpe:2.3:a:digium:certified_asterisk:16.8:cert4:*:*:*:*:*:* *cpe:2.3:a:digium:certified_asterisk:16.8:cert4-rc1:*:*:*:*:*:* *cpe:2.3:a:digium:certified_asterisk:16.8:cert4-rc2:*:*:*:*:*:* *cpe:2.3:a:digium:certified_asterisk:16.8:cert4-rc3:*:*:*:*:*:* *cpe:2.3:a:digium:certified_asterisk:16.8:cert4-rc4:*:*:*:*:*:* -
CVE Modified by [email protected]
Nov. 10, 2020
Action Type Old Value New Value Added Reference https://issues.asterisk.org/jira/browse/ASTERISK-29057 [No Types Assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2020-28327 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-2020-28327
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.09 }} -0.03%
score
0.38062
percentile