CVE-2018-7284 Information

Description

A Buffer Overflow issue was discovered in Asterisk through 13.19.1 14.x through 14.7.5 and 15.x through 15.2.1 and Certified Asterisk through 13.18-cert2. When processing a SUBSCRIBE request the res_pjsip_pubsub module stores the accepted formats present in the Accept headers of the request. This code did not limit the number of headers it processed despite having a fixed limit of 32. If more than 32 Accept headers were present the code would write outside of its memory and cause a crash.

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Reference

http://downloads.asterisk.org/pub/security/AST-2018-004.html http://www.securityfocus.com/bid/103151 http://www.securitytracker.com/id/1040416 https://www.debian.org/security/2018/dsa-4320 https://www.exploit-db.com/exploits/44184/

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

7.5