CVE-2018-16657 : 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

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.

Published 2018-09-07 14:29:03

Updated 2020-08-24 17:37:01

Source MITRE

View at NVD, CVE.org

Vulnerability category: Memory CorruptionDenial of service

Threat overview for CVE-2018-16657

Top countries where our scanners detected CVE-2018-16657

Top open port discovered on systems with this issue 5060

IPs affected by CVE-2018-16657 161

Threat actors abusing to this issue? Yes

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Exploit prediction scoring system (EPSS) score for CVE-2018-16657

Probability of exploitation activity in the next 30 days: 1.14%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 84 % EPSS Score History EPSS FAQ

CVSS scores for CVE-2018-16657

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
7.5	HIGH	AV:N/AC:L/Au:N/C:P/I:P/A:P	10.0	6.4	NIST
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: Partial Integrity Impact: Partial Availability Impact: Partial
9.8	CRITICAL	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	3.9	5.9	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: High Integrity: High Availability: High

CWE ids for CVE-2018-16657

CWE-476 NULL Pointer Dereference

A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2018-16657

https://skalatan.de/blog/advisory-hw-2018-06

Advisory HW-2018-06 | skalatan.de
Exploit;Patch;Third Party Advisory
https://www.debian.org/security/2018/dsa-4292

Debian -- Security Information -- DSA-4292-1 kamailio
Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/09/msg00013.html

[SECURITY] [DLA 1503-1] kamailio security update
Mailing List;Third Party Advisory

Products affected by CVE-2018-16657