{"id":"UBUNTU-CVE-2018-6345","details":"The function number_format is vulnerable to a heap overflow issue when its second argument ($dec_points) is excessively large. The internal implementation of the function will cause a string to be created with an invalid length, which can then interact poorly with other functions. This affects all supported versions of HHVM (3.30.1 and 3.27.5 and below).","modified":"2026-04-22T12:02:12.605278Z","published":"2019-01-15T22:29:00Z","upstream":["CVE-2018-6345"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2018-6345"},{"type":"REPORT","url":"https://github.com/facebook/hhvm/commit/190ffdf6c8b1ec443be202c7d69e63a7e3da25e3"},{"type":"REPORT","url":"https://hhvm.com/blog/2019/01/14/hhvm-3.30.2.html"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2018-6345"}],"affected":[{"package":{"name":"hhvm","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/hhvm@3.11.1+dfsg-1ubuntu1?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.11.0+dfsg-1","3.11.1+dfsg-1","3.11.1+dfsg-1ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_name":"hhvm","binary_version":"3.11.1+dfsg-1ubuntu1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-6345.json"}},{"package":{"name":"hhvm","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/hhvm@3.21.0+dfsg-2ubuntu2?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.21.0+dfsg-2","3.21.0+dfsg-2build1","3.21.0+dfsg-2build2","3.21.0+dfsg-2build3","3.21.0+dfsg-2ubuntu2"],"ecosystem_specific":{"binaries":[{"binary_name":"hhvm","binary_version":"3.21.0+dfsg-2ubuntu2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-6345.json"}}],"schema_version":"1.7.5","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":"medium"}]}