Is CVE-2018-16657 in the CISA KEV catalog?

No. CVE-2018-16657 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2018-16657?

CVE-2018-16657 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2018-16657?

CVE-2018-16657 has an EPSS score of 3.58% (88th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2018-16657?

Upgrade kamailio on debian 11 to 5.1.4-1 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2018-16657

CRITICALEPSS 88th pctl

9.8

CVSS v3

NVD

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.

CWE-476NULL Pointer Dereference

How to fix

Remediation Available

kamailioDebian

Fixed in:5.1.4-1CVE-2018-16657

kamailioUbuntu

Fixed in:4.3.4-1.1ubuntu2.1+esm1USN-6022-1

Fixed in:5.1.2-1ubuntu2+esm1USN-6022-1

Fixed in:5.3.2-1ubuntu0.1~esm1USN-6022-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

3.58%probability of exploitation in 30 days

88thpercentile

Elevated risk: more likely to be exploited than 88% of all known CVEs.

References

Patch1

skalatan.de

Third-Party Advisory2

Related Vulnerabilities

Other CWE-476 (NULL Pointer Dereference) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-21758	High	7.5	92%	-	Fix
CVE-2023-21547	High	7.5	88%	-	Fix
CVE-2014-3470	Medium	4.3	86%	-	Fix
CVE-2021-44224	High	8.2	82%	-	Fix
CVE-2016-0742	High	7.5	82%	-	Fix
CVE-2009-1386	Medium	5.0	80%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.