Asterisk's PJSIP_HEADER dialplan function can overwrite memory/cause crash when using 'update'
CVE-2023-37457

7.5HIGH

Key Information:

Vendor

Asterisk

Status
Asterisk
Vendor
CVE Published:
14 December 2023

What is CVE-2023-37457?

Inversions of Asterisk prior to version 18.20.0, 20.5.0, and 21.0.0 contain a buffer overflow risk within the PJSIP_HEADER dialplan function. This vulnerability allows an attacker to overwrite memory or potentially crash the system if the dialplan is improperly configured to update a header with data from untrusted sources. If the 'update' functionality is not utilized, the risk is mitigated. A corrective patch is available for immediate application.

Affected Version(s)

asterisk <= 18.20.0 <= 18.20.0

asterisk >= 19.0.0, <= 20.5.0 <= 19.0.0, 20.5.0

asterisk = 21.0.0 = 21.0.0

References

https://github.com/asterisk/asterisk/security/advisories/...
x_refsource_CONFIRM
https://github.com/asterisk/asterisk/commit/a1ca026825437...
x_refsource_MISC
https://lists.debian.org/debian-lts-announce/2023/12/msg0...

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.