{"id":"UBUNTU-CVE-2026-119760","details":"sniproxy through 0.7.0 contains a NULL pointer dereference vulnerability in resolv_cancel() that allows remote unauthenticated attackers to crash the daemon by sending overlong hostnames. Attackers can send a 254 or 255 character TLS SNI name or HTTP Host header matching a wildcard backend, then close the connection to terminate the proxy.","modified":"2026-11-04T03:30:32.575452388Z","published":"2026-11-03T00:00:00Z","upstream":["CVE-2026-119760"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-119760"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-119760"},{"type":"REPORT","url":"https://github.com/dlundquist/sniproxy/issues/411"},{"type":"REPORT","url":"https://github.com/dlundquist/sniproxy"},{"type":"REPORT","url":"https://github.com/dlundquist/sniproxy/blob/1cc625ea41796695a54593d1bd779366b82b8b4e/src/connection.c#L737-L738"},{"type":"REPORT","url":"https://github.com/dlundquist/sniproxy/blob/1cc625ea41796695a54593d1bd779366b82b8b4e/src/resolv.c#L219-L224"},{"type":"REPORT","url":"https://github.com/renaudallard/sniproxy/commit/17986ba7397297313331297cac3b9eb3f0ba96b7"},{"type":"REPORT","url":"https://github.com/renaudallard/sniproxy/commit/d5d78290c8fe15d9aa12185d2c57739b7b0c6a6b"},{"type":"REPORT","url":"https://www.vulncheck.com/advisories/sniproxy-through-0.7.0-null-pointer-dereference-via-resolv-cancel"}],"affected":[{"package":{"name":"sniproxy","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/sniproxy?arch=source&distro=esm-apps%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.5.0-2","0.5.0-2ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_version":"0.5.0-2ubuntu0.1~esm1","binary_name":"sniproxy"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-119760.json"}},{"package":{"name":"sniproxy","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/sniproxy?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.6.0-1","0.6.0-1ubuntu0.1"],"ecosystem_specific":{"binaries":[{"binary_version":"0.6.0-1ubuntu0.1","binary_name":"sniproxy"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-119760.json"}},{"package":{"name":"sniproxy","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/sniproxy?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.6.0-2","0.6.0-2ubuntu0.22.04.1"],"ecosystem_specific":{"binaries":[{"binary_name":"sniproxy","binary_version":"0.6.0-2ubuntu0.22.04.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-119760.json"}},{"package":{"name":"sniproxy","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/sniproxy?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.6.0-2.1","0.6.0-2.1build1","0.6.0-2.1build2"],"ecosystem_specific":{"binaries":[{"binary_name":"sniproxy","binary_version":"0.6.0-2.1build2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-119760.json"}},{"package":{"name":"sniproxy","ecosystem":"Ubuntu:26.10","purl":"pkg:deb/ubuntu/sniproxy?arch=source&distro=stonking"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.6.1+git20240321-0.2build1","0.7.0-1"],"ecosystem_specific":{"binaries":[{"binary_name":"sniproxy","binary_version":"0.7.0-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-119760.json"}},{"package":{"name":"sniproxy","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/sniproxy?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.6.1+git20240321-0.2","0.6.1+git20240321-0.2build1"],"ecosystem_specific":{"binaries":[{"binary_name":"sniproxy","binary_version":"0.6.1+git20240321-0.2build1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-119760.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"medium"}]}