{"id":"UBUNTU-CVE-2017-7890","details":"The GIF decoding function gdImageCreateFromGifCtx in gd_gif_in.c in the GD Graphics Library (aka libgd), as used in PHP before 5.6.31 and 7.x before 7.1.7, does not zero colorMap arrays before use. A specially crafted GIF image could use the uninitialized tables to read ~700 bytes from the top of the stack, potentially disclosing sensitive information.","modified":"2026-04-22T11:34:00.126541Z","published":"2017-08-02T00:00:00Z","related":["USN-3389-1","USN-3389-2"],"upstream":["CVE-2017-7890"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2017-7890"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-3389-1"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-3389-2"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2017-7890"}],"affected":[{"package":{"name":"libgd2","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/libgd2@2.1.0-3ubuntu0.7?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.1.0-3ubuntu0.7"}]}],"versions":["2.1.0-2","2.1.0-3","2.1.0-3ubuntu0.1","2.1.0-3ubuntu0.2","2.1.0-3ubuntu0.3","2.1.0-3ubuntu0.5","2.1.0-3ubuntu0.6"],"ecosystem_specific":{"binaries":[{"binary_name":"libgd-tools","binary_version":"2.1.0-3ubuntu0.7"},{"binary_name":"libgd3","binary_version":"2.1.0-3ubuntu0.7"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2017/UBUNTU-CVE-2017-7890.json"}},{"package":{"name":"libgd2","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/libgd2@2.1.1-4ubuntu0.16.04.7?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.1.1-4ubuntu0.16.04.7"}]}],"versions":["2.1.1-4build1","2.1.1-4build2","2.1.1-4ubuntu0.16.04.1","2.1.1-4ubuntu0.16.04.2","2.1.1-4ubuntu0.16.04.3","2.1.1-4ubuntu0.16.04.5","2.1.1-4ubuntu0.16.04.6"],"ecosystem_specific":{"binaries":[{"binary_name":"libgd-tools","binary_version":"2.1.1-4ubuntu0.16.04.7"},{"binary_name":"libgd3","binary_version":"2.1.1-4ubuntu0.16.04.7"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2017/UBUNTU-CVE-2017-7890.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N"},{"type":"Ubuntu","score":"medium"}]}