Every CVE Search/ Get API key

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...

9.8 CriticalFix available

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.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

3.58%Up 1.8 points since Apr 14, 2021
90%50%10%1%

What each source reports

NVD Score used 9.8

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.

Record
CVE-2018-16657
CVSS 3.0
9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0
7.5 HighAV:N/AC:L/Au:N/C:P/I:P/A:P
Weakness
CWE-476
Updated
2026-11-02
CVE List No score

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.

Record
CVE-2018-16657
Updated
2026-11-02
EUVDEUVD-2018-8459 No score

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.

Record
EUVD-2018-8459
Updated
2026-11-03
GitHub AdvisoriesGHSA-4477-4jr7-cfjq 9.8

In Kamailio before 5.0.7 and 5.1.x before 5.1.4, a crafted SIP message with an invalid Via header...

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.

Record
GHSA-4477-4jr7-cfjq
CVSS 3.0
9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-476
Updated
2026-11-02
OSV 9.8

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.

Record
CVE-2018-16657
CVSS 3.0
9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVDEBIAN-CVE-2018-16657 9.8

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.

Record
DEBIAN-CVE-2018-16657
CVSS 3.0
9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2018-16657 9.8

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.

Record
UBUNTU-CVE-2018-16657
CVSS 3.0
9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVUSN-6022-1 No score

kamailio vulnerabilities

It was discovered that Kamailio did not properly sanitize SIP messages under certain circumstances. An attacker could use this vulnerability to cause a denial of service or possibly execute arbitrary code. This issue only affected Ubuntu 16.04 ESM and 18.04 ESM. (CVE-2018-16657)

It was discovered that Kamailio did not properly validate INVITE requests under certain circumstances. An attacker could use this vulnerability to cause a denial of service or possibly execute arbitrary code. (CVE-2020-27507)

Record
USN-6022-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
kamailio
Debian:12
 before 5.1.4-1
5.1.4-1
kamailio
Debian:13
 before 5.1.4-1
5.1.4-1
kamailio
Debian:14
 before 5.1.4-1
5.1.4-1
kamailio
Debian:8
 before 4.2.0-2+deb8u5, plus listed versions
4.2.0-24.2.0-2+deb8u14.2.0-2+deb8u24.2.0-2+deb8u34.2.0-2+deb8u4
4.2.0-2+deb8u5
kamailio
Debian:9
 before 4.4.4-2+deb9u3, plus listed versions
4.4.4-24.4.4-2+deb9u14.4.4-2+deb9u2
4.4.4-2+deb9u3
kamailio
Ubuntu:Pro:16.04:LTS
 before 4.3.4-1.1ubuntu2.1+esm1, plus listed versions
4.3.1-2ubuntu14.3.4-1.1ubuntu14.3.4-1.1ubuntu24.3.4-1.1ubuntu2.1
4.3.4-1.1ubuntu2.1+esm1
kamailio
Ubuntu:Pro:18.04:LTS
 before 5.1.2-1ubuntu2+esm1, plus listed versions
4.4.2-3ubuntu55.0.4-1ubuntu15.1.1-1ubuntu15.1.1-1ubuntu45.1.2-1ubuntu15.1.2-1ubuntu2
5.1.2-1ubuntu2+esm1
kamailio
Ubuntu:Pro:16.04:LTS
From an advisory covering 2 CVEs
 before 4.3.4-1.1ubuntu2.1+esm1, plus listed versions
4.3.1-2ubuntu14.3.4-1.1ubuntu14.3.4-1.1ubuntu24.3.4-1.1ubuntu2.1
4.3.4-1.1ubuntu2.1+esm1
kamailio
Ubuntu:Pro:18.04:LTS
From an advisory covering 2 CVEs
 before 5.1.2-1ubuntu2+esm1, plus listed versions
4.4.2-3ubuntu55.0.4-1ubuntu15.1.1-1ubuntu15.1.1-1ubuntu45.1.2-1ubuntu15.1.2-1ubuntu2
5.1.2-1ubuntu2+esm1
kamailio
Ubuntu:Pro:20.04:LTS
From an advisory covering 2 CVEs
 before 5.3.2-1ubuntu0.1~esm1, plus listed versions
5.2.3-1build35.2.3-1build45.3.0-25.3.1-15.3.2-1build15.3.2-1build25.3.2-1build3
5.3.2-1ubuntu0.1~esm1

History

History
RecordedChangedSources
affected, facts
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2018-16657 is a critical vulnerability (CVSS 9.8) in Kamailio, published September 7, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 3.58%, the 89th percentile. Fixed in kamailio 5.1.4-1.

References

Show 7 moreShow less
Pages All vulnerabilities Browse Docs Sources Guide Get API key
MoveEnter Open