{"id":"UBUNTU-CVE-2018-20533","details":"There is a NULL pointer dereference at ext/testcase.c (function testcase_str2dep_complex) in libsolvext.a in libsolv through 0.7.2 that will cause a denial of service.","modified":"2026-04-22T13:05:37.275738Z","published":"2018-12-28T00:00:00Z","related":["USN-3916-1","USN-4851-1"],"upstream":["CVE-2018-20533"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2018-20533"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1652599"},{"type":"REPORT","url":"https://github.com/openSUSE/libsolv/pull/291"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-3916-1"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4851-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2018-20533"}],"affected":[{"package":{"name":"libsolv","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/libsolv@0.6.11-1.1ubuntu0.1~esm1?arch=source&distro=esm-apps/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.6.11-1.1ubuntu0.1~esm1"}]}],"versions":["0.6.11-1","0.6.11-1build1","0.6.11-1.1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_name":"libsolv-perl","binary_version":"0.6.11-1.1ubuntu0.1~esm1"},{"binary_name":"libsolv-tools","binary_version":"0.6.11-1.1ubuntu0.1~esm1"},{"binary_name":"libsolv0","binary_version":"0.6.11-1.1ubuntu0.1~esm1"},{"binary_name":"libsolvext0","binary_version":"0.6.11-1.1ubuntu0.1~esm1"},{"binary_name":"python-solv","binary_version":"0.6.11-1.1ubuntu0.1~esm1"},{"binary_name":"python3-solv","binary_version":"0.6.11-1.1ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-20533.json"}},{"package":{"name":"libsolv","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/libsolv@0.6.30-1ubuntu0.1~esm1?arch=source&distro=esm-apps/bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.6.30-1ubuntu0.1~esm1"}]}],"versions":["0.6.28-2build1","0.6.30-1build1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_name":"libsolv-perl","binary_version":"0.6.30-1ubuntu0.1~esm1"},{"binary_name":"libsolv-tools","binary_version":"0.6.30-1ubuntu0.1~esm1"},{"binary_name":"libsolv0","binary_version":"0.6.30-1ubuntu0.1~esm1"},{"binary_name":"libsolvext0","binary_version":"0.6.30-1ubuntu0.1~esm1"},{"binary_version":"0.6.30-1ubuntu0.1~esm1","binary_name":"python-solv"},{"binary_name":"python3-solv","binary_version":"0.6.30-1ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-20533.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:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}