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CVE-2018-7284

Status Candidate

Overview

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.

Related Files

Asterisk 15.2.0 chan_pjsip SUBSCRIBE Stack Corruption
Posted Feb 26, 2018
Authored by Sandro Gauci, Alfred Farrugia

Asterisk running chan_pjsip suffers from a SUBSCRIBE message stack corruption vulnerability. Vulnerable versions include 15.2.0, 13.19.0, 14.7.5, and 13.11.2.

tags | exploit
advisories | CVE-2018-7284
SHA-256 | 7ce6eb5d2b74840cec684d30e389db8a84881dd35088091f86c3e601f3984460
Asterisk Project Security Advisory - AST-2018-004
Posted Feb 23, 2018
Authored by Joshua Colp, Sandro Gauci | Site asterisk.org

Asterisk Project Security Advisory - 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.

tags | advisory
advisories | CVE-2018-7284
SHA-256 | 2ca83ced6bedaa74703ffe260735d9b6a5f8e6d560c01ef31601708735e0b831
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