CVE-2019-18976

HIGH EPSS 93.1%
Published Nov 22, 20196y ago · Modified Jun 17, 20262w ago
7.5 CVSS 3.1
High
Find Similar
Published Nov 22, 2019 6y ago
Last Modified Jun 17, 2026 2w ago

Description

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.

CVSS Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
93.1% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-476 NULL Pointer Dereference Memory Safety

Affected Products 7

VendorProductVersionRange
digiumasterisk*≥13.0.0  –  ≤13.29.1
digiumcertified_asterisk13.21any
digiumcertified_asterisk13.21any
digiumcertified_asterisk13.21any
digiumcertified_asterisk13.21any
digiumcertified_asterisk13.21any
debiandebian_linux9.0any

References 6

  • downloads.asterisk.org http://downloads.asterisk.org/pub/security/AST-2019-008.html
    Vendor Advisory
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2022/04/msg00001.html
    Mailing ListThird Party Advisory
  • packetstormsecurity.com https://packetstormsecurity.com/files/155436/Asterisk-Project-Security-Advisory-AST-2019-008.html
    Third Party AdvisoryVDB Entry
  • seclists.org https://seclists.org/fulldisclosure/2019/Nov/20
    Mailing ListThird Party Advisory
  • asterisk.org https://www.asterisk.org/downloads/security-advisories
    Vendor Advisory
  • cybersecurity-help.cz https://www.cybersecurity-help.cz/vdb/SB2019112218?affChecked=1
    Third Party Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.