CVE-2019-18976
5 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.4 High
AI Score
Confidence
High
0.062 Low
EPSS
Percentile
93.6%
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.
Affected configurations
| CPE | Name | Operator | Version |
|---|---|---|---|
| digium:asterisk | digium asterisk | le | 13.29.1 |
| digium:certified_asterisk | digium certified asterisk | eq | 13.21 |
References
downloads.asterisk.org/pub/security/AST-2019-008.html
lists.debian.org/debian-lts-announce/2022/04/msg00001.html
packetstormsecurity.com/files/155436/Asterisk-Project-Security-Advisory-AST-2019-008.html
seclists.org/fulldisclosure/2019/Nov/20
www.asterisk.org/downloads/security-advisories
www.cybersecurity-help.cz/vdb/SB2019112218?affChecked=1
Related
5 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.4 High
AI Score
Confidence
High
0.062 Low
EPSS
Percentile
93.6%