{"id":"USN-6409-1","summary":"glibc vulnerabilities","details":"It was discovered that the GNU C Library incorrectly handled the\nGLIBC_TUNABLES environment variable. An attacker could possibly use this\nissue to perform a privilege escalation attack. (CVE-2023-4911)\n\nIt was discovered that the GNU C Library incorrectly handled certain DNS\nresponses when the system was configured in no-aaaa mode. A remote attacker\ncould possibly use this issue to cause the GNU C Library to crash,\nresulting in a denial of service. This issue only affected Ubuntu 23.04.\n(CVE-2023-4527)\n","modified":"2026-04-22T11:07:15.151457Z","published":"2023-10-03T18:04:23Z","related":["UBUNTU-CVE-2023-4911"],"upstream":["CVE-2023-4911","UBUNTU-CVE-2023-4527","UBUNTU-CVE-2023-4911"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-6409-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2023-4527"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2023-4911"}],"affected":[{"package":{"name":"glibc","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/glibc@2.35-0ubuntu3.4?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.35-0ubuntu3.4"}]}],"versions":["2.34-0ubuntu3","2.35-0ubuntu1","2.35-0ubuntu3","2.35-0ubuntu3.1","2.35-0ubuntu3.3"],"ecosystem_specific":{"binaries":[{"binary_name":"glibc-source","binary_version":"2.35-0ubuntu3.4"},{"binary_name":"libc-bin","binary_version":"2.35-0ubuntu3.4"},{"binary_name":"libc-dev-bin","binary_version":"2.35-0ubuntu3.4"},{"binary_name":"libc-devtools","binary_version":"2.35-0ubuntu3.4"},{"binary_name":"libc6","binary_version":"2.35-0ubuntu3.4"},{"binary_name":"libc6-amd64","binary_version":"2.35-0ubuntu3.4"},{"binary_name":"libc6-dev-amd64","binary_version":"2.35-0ubuntu3.4"},{"binary_name":"libc6-dev-i386","binary_version":"2.35-0ubuntu3.4"},{"binary_name":"libc6-dev-s390","binary_version":"2.35-0ubuntu3.4"},{"binary_name":"libc6-dev-x32","binary_version":"2.35-0ubuntu3.4"},{"binary_name":"libc6-i386","binary_version":"2.35-0ubuntu3.4"},{"binary_name":"libc6-prof","binary_version":"2.35-0ubuntu3.4"},{"binary_name":"libc6-s390","binary_version":"2.35-0ubuntu3.4"},{"binary_name":"libc6-x32","binary_version":"2.35-0ubuntu3.4"},{"binary_name":"locales","binary_version":"2.35-0ubuntu3.4"},{"binary_name":"locales-all","binary_version":"2.35-0ubuntu3.4"},{"binary_name":"nscd","binary_version":"2.35-0ubuntu3.4"}],"availability":"No subscription required"},"database_specific":{"cves_map":{"cves":[{"id":"CVE-2023-4911","severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"high","type":"Ubuntu"}]}],"ecosystem":"Ubuntu:22.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-6409-1.json"}}],"schema_version":"1.7.5"}