Vulnerability Monitor

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CVE-2019-18976

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.

Published

2019-11-22T17:15:11.833

Last Modified

2024-11-21T04:33:55.320

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 7.5 (HIGH)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:N/I:N/A:P

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: NONE
Availability Impact: PARTIAL

Exploitability Score

10.0

Impact Score

2.9

Weaknesses

Type: Primary
CWE-476

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	digium	asterisk	≤ 13.29.1	Yes
Application	digium	certified_asterisk	13.21	Yes
Application	digium	certified_asterisk	13.21	Yes
Application	digium	certified_asterisk	13.21	Yes
Application	digium	certified_asterisk	13.21	Yes
Application	digium	certified_asterisk	13.21	Yes
Operating System	debian	debian_linux	9.0	Yes

References

http://downloads.asterisk.org/pub/security/AST-2019-008.html Vendor Advisory ([email protected])
https://lists.debian.org/debian-lts-announce/2022/04/msg00001.html Mailing List, Third Party Advisory ([email protected])
https://packetstormsecurity.com/files/155436/Asterisk-Project-Security-Advisory-AST-2019-008.html Third Party Advisory, VDB Entry ([email protected])
https://seclists.org/fulldisclosure/2019/Nov/20 Mailing List, Third Party Advisory ([email protected])
https://www.asterisk.org/downloads/security-advisories Vendor Advisory ([email protected])
https://www.cybersecurity-help.cz/vdb/SB2019112218?affChecked=1 Third Party Advisory ([email protected])
http://downloads.asterisk.org/pub/security/AST-2019-008.html Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://lists.debian.org/debian-lts-announce/2022/04/msg00001.html Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://packetstormsecurity.com/files/155436/Asterisk-Project-Security-Advisory-AST-2019-008.html Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
https://seclists.org/fulldisclosure/2019/Nov/20 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.asterisk.org/downloads/security-advisories Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.cybersecurity-help.cz/vdb/SB2019112218?affChecked=1 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)