UBUNTU-CVE-2026-45103

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Source
https://ubuntu.com/security/CVE-2026-45103
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-45103.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-45103
Upstream
Published
2026-08-04T22:17:00Z
Modified
2026-08-06T03:09:02.055085379Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

OpenSIPS is a Session Initiation Protocol (SIP) server implementation. In versions prior to 3.6.6 and 4.0.0-rc1, the TCP message framing layer parses the Content-Length header using unsigned int arithmetic with no overflow check. When an attacker sends a Content-Length value that overflows unsigned int (e.g., 4294967296), the framing layer computes a wrapped-around value (e.g., 0) and splits the TCP stream at the wrong boundary, causing the body of the first SIP message to be processed as a separate message and enabling SIP message smuggling. Because Content-Length is parsed in the transport layer before authentication, an unauthenticated, network-based attacker can smuggle arbitrary SIP messages over any TCP-based transport (prototcp, prototls, protows, protowss) on any instance with TCP enabled, with no routing-script preconditions. This allows smuggled messages to bypass front-end SBC/proxy security policies, inherit the connection's authentication context, and evade rate limiting. This issue has been fixed in versions 3.6.6 and 4.0.0-rc1.

References

Affected packages

Ubuntu:18.04:LTS / opensips

Package

Name
opensips
Purl
pkg:deb/ubuntu/opensips?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.2.2-3build2
2.2.2-3build3
2.2.2-3build4

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "opensips",
            "binary_version": "2.2.2-3build4"
        },
        {
            "binary_name": "opensips-b2bua-module",
            "binary_version": "2.2.2-3build4"
        },
        {
            "binary_name": "opensips-berkeley-bin",
            "binary_version": "2.2.2-3build4"
        },
        {
            "binary_name": "opensips-berkeley-module",
            "binary_version": "2.2.2-3build4"
        },
        {
            "binary_name": "opensips-carrierroute-module",
            "binary_version": "2.2.2-3build4"
        },
        {
            "binary_name": "opensips-compression-module",
            "binary_version": "2.2.2-3build4"
        },
        {
            "binary_name": "opensips-console",
            "binary_version": "2.2.2-3build4"
        },
        {
            "binary_name": "opensips-cpl-module",
            "binary_version": "2.2.2-3build4"
        },
        {
            "binary_name": "opensips-dbhttp-module",
            "binary_version": "2.2.2-3build4"
        },
        {
            "binary_name": "opensips-dialplan-module",
            "binary_version": "2.2.2-3build4"
        },
        {
            "binary_name": "opensips-emergency-module",
            "binary_version": "2.2.2-3build4"
        },
        {
            "binary_name": "opensips-geoip-module",
            "binary_version": "2.2.2-3build4"
        },
        {
            "binary_name": "opensips-http-modules",
            "binary_version": "2.2.2-3build4"
        },
        {
            "binary_name": "opensips-identity-module",
            "binary_version": "2.2.2-3build4"
        },
        {
            "binary_name": "opensips-jabber-module",
            "binary_version": "2.2.2-3build4"
        },
        {
            "binary_name": "opensips-json-module",
            "binary_version": "2.2.2-3build4"
        },
        {
            "binary_name": "opensips-ldap-modules",
            "binary_version": "2.2.2-3build4"
        },
        {
            "binary_name": "opensips-lua-module",
            "binary_version": "2.2.2-3build4"
        },
        {
            "binary_name": "opensips-memcached-module",
            "binary_version": "2.2.2-3build4"
        },
        {
            "binary_name": "opensips-mysql-module",
            "binary_version": "2.2.2-3build4"
        },
        {
            "binary_name": "opensips-perl-modules",
            "binary_version": "2.2.2-3build4"
        },
        {
            "binary_name": "opensips-postgres-module",
            "binary_version": "2.2.2-3build4"
        },
        {
            "binary_name": "opensips-presence-modules",
            "binary_version": "2.2.2-3build4"
        },
        {
            "binary_name": "opensips-rabbitmq-module",
            "binary_version": "2.2.2-3build4"
        },
        {
            "binary_name": "opensips-radius-modules",
            "binary_version": "2.2.2-3build4"
        },
        {
            "binary_name": "opensips-redis-module",
            "binary_version": "2.2.2-3build4"
        },
        {
            "binary_name": "opensips-regex-module",
            "binary_version": "2.2.2-3build4"
        },
        {
            "binary_name": "opensips-restclient-module",
            "binary_version": "2.2.2-3build4"
        },
        {
            "binary_name": "opensips-sctp-module",
            "binary_version": "2.2.2-3build4"
        },
        {
            "binary_name": "opensips-snmpstats-module",
            "binary_version": "2.2.2-3build4"
        },
        {
            "binary_name": "opensips-sqlite-module",
            "binary_version": "2.2.2-3build4"
        },
        {
            "binary_name": "opensips-tls-module",
            "binary_version": "2.2.2-3build4"
        },
        {
            "binary_name": "opensips-tlsmgm-module",
            "binary_version": "2.2.2-3build4"
        },
        {
            "binary_name": "opensips-unixodbc-module",
            "binary_version": "2.2.2-3build4"
        },
        {
            "binary_name": "opensips-wss-module",
            "binary_version": "2.2.2-3build4"
        },
        {
            "binary_name": "opensips-xmlrpc-module",
            "binary_version": "2.2.2-3build4"
        },
        {
            "binary_name": "opensips-xmpp-module",
            "binary_version": "2.2.2-3build4"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-45103.json"