Bug 1801690 (CVE-2019-18976)

Summary:	CVE-2019-18976 asterisk: null pointer dereference in res_pjsip_t38.c
Product:	[Other] Security Response	Reporter:	Dhananjay Arunesh <darunesh>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	bennie.joubert, itamar, jsmith.fedora, rbryant
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-10-28 05:24:21 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1801691
Bug Blocks:

Description Dhananjay Arunesh 2020-02-11 13:42:58 UTC

An issue was discovered in res_pjsip_t38.c in Sangoma Asterisk through 13.x and Certified Asterisk through 13.21-x. If it receives a re-invite initiating T.38 faxing and has a port of 0 and no c line in the SDP, a NULL pointer dereference and crash will occur. This is different from CVE-2019-18940.

Reference:
http://downloads.asterisk.org/pub/security/AST-2019-008.html
https://seclists.org/fulldisclosure/2019/Nov/20

Comment 1 Dhananjay Arunesh 2020-02-11 13:44:23 UTC

Created asterisk tracking bugs for this issue:

Affects: epel-6 [bug 1801691]