{"id":"CVE-2016-9843","url":"https://www.cyber-defence.io/tools/cve/CVE-2016-9843","generatedAt":"2026-10-28T20:47:05.845Z","title":"The crc32_big function in crc32.c in zlib 1.2.8 might allow context-dependent attackers to have unspecified impact via vectors involving big-endian CRC calculation.","description":"The crc32_big function in crc32.c in zlib 1.2.8 might allow context-dependent attackers to have unspecified impact via vectors involving big-endian CRC calculation.","published":"2017-05-23T04:29:02.000Z","lastModified":"2026-06-17T00:56:39.000Z","status":"Modified","sourceIdentifier":"security@opentext.com","cvss":{"version":"3.1","score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":[],"affected":["zlib/zlib","opensuse/leap","opensuse/opensuse","debian/debian linux","canonical/ubuntu linux","oracle/database server","oracle/jdk","oracle/jre","oracle/mysql","redhat/satellite","redhat/enterprise linux desktop","redhat/enterprise linux eus","redhat/enterprise linux server","redhat/enterprise linux workstation","apple/iphone os","apple/mac os x","apple/tvos","apple/watchos","netapp/active iq unified manager","netapp/oncommand insight","netapp/oncommand workflow automation","netapp/snapcenter","mariadb/mariadb","nodejs/node.js"],"epss":{"score":0.05766,"percentile":0.93045,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (5.77%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"http://lists.opensuse.org/opensuse-updates/2016-12/msg00127.html","source":"security@opentext.com"},{"url":"http://lists.opensuse.org/opensuse-updates/2017-01/msg00050.html","source":"security@opentext.com"},{"url":"http://lists.opensuse.org/opensuse-updates/2017-01/msg00053.html","source":"security@opentext.com"},{"url":"http://www.openwall.com/lists/oss-security/2016/12/05/21","source":"security@opentext.com"},{"url":"http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html","source":"security@opentext.com"},{"url":"http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html","source":"security@opentext.com"},{"url":"http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html","source":"security@opentext.com"},{"url":"http://www.securityfocus.com/bid/95131","source":"security@opentext.com"},{"url":"http://www.securitytracker.com/id/1039427","source":"security@opentext.com"},{"url":"http://www.securitytracker.com/id/1041888","source":"security@opentext.com"},{"url":"https://access.redhat.com/errata/RHSA-2017:1220","source":"security@opentext.com"},{"url":"https://access.redhat.com/errata/RHSA-2017:1221","source":"security@opentext.com"},{"url":"https://access.redhat.com/errata/RHSA-2017:1222","source":"security@opentext.com"},{"url":"https://access.redhat.com/errata/RHSA-2017:2999","source":"security@opentext.com"},{"url":"https://access.redhat.com/errata/RHSA-2017:3046","source":"security@opentext.com"},{"url":"https://access.redhat.com/errata/RHSA-2017:3047","source":"security@opentext.com"},{"url":"https://access.redhat.com/errata/RHSA-2017:3453","source":"security@opentext.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1402351","source":"security@opentext.com"},{"url":"https://github.com/madler/zlib/commit/d1d577490c15a0c6862473d7576352a9f18ef811","source":"security@opentext.com"},{"url":"https://lists.debian.org/debian-lts-announce/2019/03/msg00027.html","source":"security@opentext.com"},{"url":"https://lists.debian.org/debian-lts-announce/2020/01/msg00030.html","source":"security@opentext.com"},{"url":"https://security.gentoo.org/glsa/201701-56","source":"security@opentext.com"},{"url":"https://security.gentoo.org/glsa/202007-54","source":"security@opentext.com"},{"url":"https://security.netapp.com/advisory/ntap-20181018-0002/","source":"security@opentext.com"},{"url":"https://support.apple.com/HT208112","source":"security@opentext.com"},{"url":"https://support.apple.com/HT208113","source":"security@opentext.com"},{"url":"https://support.apple.com/HT208115","source":"security@opentext.com"},{"url":"https://support.apple.com/HT208144","source":"security@opentext.com"},{"url":"https://usn.ubuntu.com/4246-1/","source":"security@opentext.com"},{"url":"https://usn.ubuntu.com/4292-1/","source":"security@opentext.com"},{"url":"https://wiki.mozilla.org/MOSS/Secure_Open_Source/Completed#zlib","source":"security@opentext.com"},{"url":"https://wiki.mozilla.org/images/0/09/Zlib-report.pdf","source":"security@opentext.com"},{"url":"https://www.oracle.com/security-alerts/cpujul2020.html","source":"security@opentext.com"},{"url":"http://lists.opensuse.org/opensuse-updates/2016-12/msg00127.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-updates/2017-01/msg00050.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-updates/2017-01/msg00053.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.openwall.com/lists/oss-security/2016/12/05/21","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/bid/95131","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securitytracker.com/id/1039427","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securitytracker.com/id/1041888","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2017:1220","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2017:1221","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2017:1222","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2017:2999","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2017:3046","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2017:3047","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2017:3453","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1402351","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/madler/zlib/commit/d1d577490c15a0c6862473d7576352a9f18ef811","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2019/03/msg00027.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2020/01/msg00030.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.gentoo.org/glsa/201701-56","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.gentoo.org/glsa/202007-54","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.netapp.com/advisory/ntap-20181018-0002/","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.apple.com/HT208112","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.apple.com/HT208113","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.apple.com/HT208115","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2016-9843","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}