{"id":"USN-4246-1","summary":"zlib vulnerabilities","details":"\nIt was discovered that zlib incorrectly handled pointer arithmetic. An attacker\ncould use this issue to cause zlib to crash, resulting in a denial of\nservice, or possibly execute arbitrary code. (CVE-2016-9840, CVE-2016-9841)\n\nIt was discovered that zlib incorrectly handled vectors involving left shifts of\nnegative integers. An attacker could use this issue to cause zlib to\ncrash, resulting in a denial of service, or possibly execute arbitrary code.\n(CVE-2016-9842)\n\nIt was discovered that zlib incorrectly handled vectors involving big-endian CRC\ncalculation. An attacker could use this issue to cause zlib to crash,\nresulting in a denial of service, or possibly execute arbitrary code.\n(CVE-2016-9843)\n","modified":"2026-04-27T15:32:48.957831Z","published":"2020-01-22T19:00:08Z","related":["UBUNTU-CVE-2016-9840","UBUNTU-CVE-2016-9841","UBUNTU-CVE-2016-9842","UBUNTU-CVE-2016-9843"],"upstream":["CVE-2016-9840","CVE-2016-9841","CVE-2016-9842","CVE-2016-9843","UBUNTU-CVE-2016-9840","UBUNTU-CVE-2016-9841","UBUNTU-CVE-2016-9842","UBUNTU-CVE-2016-9843"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4246-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2016-9840"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2016-9841"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2016-9842"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2016-9843"}],"affected":[{"package":{"name":"zlib","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/zlib@1:1.2.8.dfsg-2ubuntu4.3?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:1.2.8.dfsg-2ubuntu4.3"}]}],"versions":["1:1.2.8.dfsg-2ubuntu4","1:1.2.8.dfsg-2ubuntu4.1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"lib32z1","binary_version":"1:1.2.8.dfsg-2ubuntu4.3"},{"binary_name":"lib64z1","binary_version":"1:1.2.8.dfsg-2ubuntu4.3"},{"binary_name":"libx32z1","binary_version":"1:1.2.8.dfsg-2ubuntu4.3"},{"binary_name":"zlib1g","binary_version":"1:1.2.8.dfsg-2ubuntu4.3"}]},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:16.04:LTS","cves":[{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"low"}],"id":"CVE-2016-9840"},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"low"}],"id":"CVE-2016-9841"},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"low"}],"id":"CVE-2016-9842"},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"low"}],"id":"CVE-2016-9843"}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4246-1.json"}}],"schema_version":"1.7.5"}