HOMEVULNERABILITIESCVE-2019-18790
MEDIUM

CVE-2019-18790

CWE-862Published: November 22, 2019· Updated: Jun 17, 2026

6.5
CVSS v3.1

Official Description

An issue was discovered in channels/chan_sip.c in Sangoma Asterisk 13.x before 13.29.2, 16.x before 16.6.2, and 17.x before 17.0.1, and Certified Asterisk 13.21 before cert5. A SIP request can be sent to Asterisk that can change a SIP peer's IP address. A REGISTER does not need to occur, and calls can be hijacked as a result. The only thing that needs to be known is the peer's name; authentication details such as passwords do not need to be known. This vulnerability is only exploitable when the nat option is set to the default, or auto_force_rport.

NVD Source

Technical Analysis

CVE-2019-18790 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityLow
IntegrityLow
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Affected Vendors & Products

Debian1 product(s)
debian linux
digium2 product(s)
asteriskcertified asterisk
Source: NVD CPE · 4 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttp://downloads.asterisk.org/pub/security/AST-2019-006.html
PATCHhttp://downloads.asterisk.org/pub/security/AST-2019-006.html
ADVISORYhttps://lists.debian.org/debian-lts-announce/2019/11/msg00038.html
ADVISORYhttps://lists.debian.org/debian-lts-announce/2022/04/msg00001.html
ADVISORYhttps://www.asterisk.org/downloads/security-advisories
ADVISORYhttps://lists.debian.org/debian-lts-announce/2019/11/msg00038.html
ADVISORYhttps://lists.debian.org/debian-lts-announce/2022/04/msg00001.html
ADVISORYhttps://www.asterisk.org/downloads/security-advisories

All References (8)

→
http://downloads.asterisk.org/pub/security/AST-2019-006.htmlPatch · Vendor Advisory
→
https://lists.debian.org/debian-lts-announce/2019/11/msg00038.htmlMailing List · Third Party Advisory
→
https://lists.debian.org/debian-lts-announce/2022/04/msg00001.htmlMailing List · Third Party Advisory
→
https://www.asterisk.org/downloads/security-advisoriesVendor Advisory
→
http://downloads.asterisk.org/pub/security/AST-2019-006.htmlPatch · Vendor Advisory
→
https://lists.debian.org/debian-lts-announce/2019/11/msg00038.htmlMailing List · Third Party Advisory
→
https://lists.debian.org/debian-lts-announce/2022/04/msg00001.htmlMailing List · Third Party Advisory
→
https://www.asterisk.org/downloads/security-advisoriesVendor Advisory

Quick Facts

CVE IDCVE-2019-18790
CVSS Score6.5 / 10
SeverityMEDIUM
WeaknessCWE-862
CISA KEVNo
Affected2 vendor(s)
PublishedNov 22, 2019

Related CVEs (CWE-862)

CVE-2024-33566
10.0
CVE-2026-2031
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CVE-2026-0092
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CVE-2026-34976
10.0
CVE-2025-30416
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CVE-2025-22609
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Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2019-18790 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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