{"id":"UBUNTU-CVE-2015-6837","details":"The xsl_ext_function_php function in ext/xsl/xsltprocessor.c in PHP before 5.4.45, 5.5.x before 5.5.29, and 5.6.x before 5.6.13, when libxml2 before 2.9.2 is used, does not consider the possibility of a NULL valuePop return value before proceeding with a free operation during initial error checking, which allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via a crafted XML document, a different vulnerability than CVE-2015-6838.","modified":"2026-04-22T10:17:02.399240Z","published":"2015-09-09T00:00:00Z","related":["USN-2758-1"],"upstream":["CVE-2015-6837"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2015-6837"},{"type":"REPORT","url":"http://www.openwall.com/lists/oss-security/2015/09/07/5"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-2758-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2015-6837"}],"affected":[{"package":{"name":"php5","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/php5@5.5.9+dfsg-1ubuntu4.13?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.5.9+dfsg-1ubuntu4.13"}]}],"versions":["5.5.3+dfsg-1ubuntu2","5.5.3+dfsg-1ubuntu3","5.5.6+dfsg-1ubuntu1","5.5.6+dfsg-1ubuntu2","5.5.8+dfsg-2ubuntu1","5.5.9+dfsg-1ubuntu1","5.5.9+dfsg-1ubuntu2","5.5.9+dfsg-1ubuntu3","5.5.9+dfsg-1ubuntu4","5.5.9+dfsg-1ubuntu4.1","5.5.9+dfsg-1ubuntu4.2","5.5.9+dfsg-1ubuntu4.3","5.5.9+dfsg-1ubuntu4.4","5.5.9+dfsg-1ubuntu4.5","5.5.9+dfsg-1ubuntu4.6","5.5.9+dfsg-1ubuntu4.7","5.5.9+dfsg-1ubuntu4.9","5.5.9+dfsg-1ubuntu4.11","5.5.9+dfsg-1ubuntu4.12"],"ecosystem_specific":{"binaries":[{"binary_name":"libapache2-mod-php5","binary_version":"5.5.9+dfsg-1ubuntu4.13"},{"binary_name":"libapache2-mod-php5filter","binary_version":"5.5.9+dfsg-1ubuntu4.13"},{"binary_name":"libphp5-embed","binary_version":"5.5.9+dfsg-1ubuntu4.13"},{"binary_name":"php-pear","binary_version":"5.5.9+dfsg-1ubuntu4.13"},{"binary_name":"php5","binary_version":"5.5.9+dfsg-1ubuntu4.13"},{"binary_name":"php5-cgi","binary_version":"5.5.9+dfsg-1ubuntu4.13"},{"binary_name":"php5-cli","binary_version":"5.5.9+dfsg-1ubuntu4.13"},{"binary_name":"php5-common","binary_version":"5.5.9+dfsg-1ubuntu4.13"},{"binary_name":"php5-curl","binary_version":"5.5.9+dfsg-1ubuntu4.13"},{"binary_name":"php5-enchant","binary_version":"5.5.9+dfsg-1ubuntu4.13"},{"binary_name":"php5-fpm","binary_version":"5.5.9+dfsg-1ubuntu4.13"},{"binary_name":"php5-gd","binary_version":"5.5.9+dfsg-1ubuntu4.13"},{"binary_name":"php5-gmp","binary_version":"5.5.9+dfsg-1ubuntu4.13"},{"binary_name":"php5-intl","binary_version":"5.5.9+dfsg-1ubuntu4.13"},{"binary_name":"php5-ldap","binary_version":"5.5.9+dfsg-1ubuntu4.13"},{"binary_name":"php5-mysql","binary_version":"5.5.9+dfsg-1ubuntu4.13"},{"binary_name":"php5-mysqlnd","binary_version":"5.5.9+dfsg-1ubuntu4.13"},{"binary_name":"php5-odbc","binary_version":"5.5.9+dfsg-1ubuntu4.13"},{"binary_name":"php5-pgsql","binary_version":"5.5.9+dfsg-1ubuntu4.13"},{"binary_name":"php5-pspell","binary_version":"5.5.9+dfsg-1ubuntu4.13"},{"binary_name":"php5-readline","binary_version":"5.5.9+dfsg-1ubuntu4.13"},{"binary_name":"php5-recode","binary_version":"5.5.9+dfsg-1ubuntu4.13"},{"binary_name":"php5-snmp","binary_version":"5.5.9+dfsg-1ubuntu4.13"},{"binary_name":"php5-sqlite","binary_version":"5.5.9+dfsg-1ubuntu4.13"},{"binary_name":"php5-sybase","binary_version":"5.5.9+dfsg-1ubuntu4.13"},{"binary_name":"php5-tidy","binary_version":"5.5.9+dfsg-1ubuntu4.13"},{"binary_name":"php5-xmlrpc","binary_version":"5.5.9+dfsg-1ubuntu4.13"},{"binary_name":"php5-xsl","binary_version":"5.5.9+dfsg-1ubuntu4.13"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2015/UBUNTU-CVE-2015-6837.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"low"}]}