{"id":"USN-7588-1","summary":"gss-ntlmssp vulnerabilities","details":"Phil Turnbull discovered that GSS NTLMSSP may perform out-of-bounds reads \nwhen decoding NTLM fields and target information. An attacker could \npossibly use this issue to cause GSS NTLMSSP to crash, resulting in \na denial of service. (CVE-2023-25563, CVE-2023-25567)\n\nPhil Turnbull discovered that GSS NTLMSSP did not properly initialize\nmemory when decoding UTF16 strings. An attacker could possibly use \nthis issue to trigger an out-of-bounds write, resulting in a crash.\n(CVE-2023-25564)\n\nPhil Turnbull discovered that GSS NTLMSSP did not properly handle memory\ncleanup. An attacker could possibly use this issue to cause an assertion\nfailure, resulting in a denial of service. (CVE-2023-25565)","modified":"2026-05-20T16:06:15.711926744Z","published":"2025-06-23T09:59:40Z","related":["UBUNTU-CVE-2023-25563","UBUNTU-CVE-2023-25564","UBUNTU-CVE-2023-25565","UBUNTU-CVE-2023-25567"],"upstream":["CVE-2023-25563","CVE-2023-25564","CVE-2023-25565","CVE-2023-25567","UBUNTU-CVE-2023-25563","UBUNTU-CVE-2023-25564","UBUNTU-CVE-2023-25565","UBUNTU-CVE-2023-25567"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-7588-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2023-25563"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2023-25564"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2023-25565"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2023-25567"}],"affected":[{"package":{"name":"gss-ntlmssp","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/gss-ntlmssp?arch=source&distro=esm-infra-legacy%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.7.0-3~ubuntu0.16.04.1+esm1"}]}],"versions":["0.6.0-1","0.7.0-3~ubuntu0.16.04.1"],"ecosystem_specific":{"binaries":[{"binary_version":"0.7.0-3~ubuntu0.16.04.1+esm1","binary_name":"gss-ntlmssp"}],"availability":"Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-7588-1.json","cves_map":{"cves":[],"ecosystem":"Ubuntu:Pro:16.04:LTS"}}},{"package":{"name":"gss-ntlmssp","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/gss-ntlmssp?arch=source&distro=esm-apps%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.7.0-4ubuntu0.18.04.1~esm1"}]}],"versions":["0.7.0-3","0.7.0-4","0.7.0-4build1","0.7.0-4build3"],"ecosystem_specific":{"binaries":[{"binary_version":"0.7.0-4ubuntu0.18.04.1~esm1","binary_name":"gss-ntlmssp"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-7588-1.json","cves_map":{"cves":[{"id":"CVE-2023-25563","severity":[{"score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","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_V3"},{"score":"medium","type":"Ubuntu"}]},{"id":"CVE-2023-25564","severity":[{"score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]},{"id":"CVE-2023-25565","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","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_V3"},{"score":"medium","type":"Ubuntu"}]},{"id":"CVE-2023-25567","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","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_V3"},{"score":"medium","type":"Ubuntu"}]}],"ecosystem":"Ubuntu:Pro:18.04:LTS"}}},{"package":{"name":"gss-ntlmssp","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/gss-ntlmssp?arch=source&distro=esm-apps%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.7.0-4ubuntu0.20.04.1~esm1"}]}],"versions":["0.7.0-4build3"],"ecosystem_specific":{"binaries":[{"binary_version":"0.7.0-4ubuntu0.20.04.1~esm1","binary_name":"gss-ntlmssp"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-7588-1.json","cves_map":{"cves":[{"id":"CVE-2023-25563","severity":[{"score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","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_V3"},{"score":"medium","type":"Ubuntu"}]},{"id":"CVE-2023-25564","severity":[{"score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]},{"id":"CVE-2023-25565","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","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_V3"},{"score":"medium","type":"Ubuntu"}]},{"id":"CVE-2023-25567","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","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_V3"},{"score":"medium","type":"Ubuntu"}]}],"ecosystem":"Ubuntu:Pro:20.04:LTS"}}},{"package":{"name":"gss-ntlmssp","ecosystem":"Ubuntu:Pro:22.04:LTS","purl":"pkg:deb/ubuntu/gss-ntlmssp?arch=source&distro=esm-apps%2Fjammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.7.0-4ubuntu0.22.04.1~esm1"}]}],"versions":["0.7.0-4build3","0.7.0-4build4"],"ecosystem_specific":{"binaries":[{"binary_version":"0.7.0-4ubuntu0.22.04.1~esm1","binary_name":"gss-ntlmssp"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-7588-1.json","cves_map":{"cves":[{"id":"CVE-2023-25563","severity":[{"score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","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_V3"},{"score":"medium","type":"Ubuntu"}]},{"id":"CVE-2023-25564","severity":[{"score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]},{"id":"CVE-2023-25565","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","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_V3"},{"score":"medium","type":"Ubuntu"}]},{"id":"CVE-2023-25567","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","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_V3"},{"score":"medium","type":"Ubuntu"}]}],"ecosystem":"Ubuntu:Pro:22.04:LTS"}}}],"schema_version":"1.7.5"}