CVE-2018-16657

Critical

Description

In Kamailio before 5.0.7 and 5.1.x before 5.1.4, a crafted SIP message with an invalid Via header causes a segmentation fault and crashes Kamailio. The reason is missing input validation in the crcitt_string_array core function for calculating a CRC hash for To tags. (An additional error is present in the check_via_address core function: this function also misses input validation.) This could result in denial of service and potentially the execution of arbitrary code.

SeverityCritical

CVSS9.8

Exploit probability—

Product

Kamailio

PublishedSep 7, 2018

First seenSep 7, 2018

How to fix

Update

kamailio kamailio5.0.7, 5.1.4 or later

Vendor advisories

debian.org/security/2018/dsa-4292

Affected products

Product	Affected versions	Fixed in
kamailio kamailio	v < 5.0.7, 5.1.0 ≤ v < 5.1.4	5.0.7, 5.1.4
debian debian_linux	8.0, 9.0	—

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