{"id":"UBUNTU-CVE-2023-24056","details":"In pkgconf through 1.9.3, variable duplication can cause unbounded string expansion due to incorrect checks in libpkgconf/tuple.c:pkgconf_tuple_parse. For example, a .pc file containing a few hundred bytes can expand to one billion bytes.","modified":"2026-04-22T14:03:04.753685Z","published":"2023-01-22T04:15:00Z","upstream":["CVE-2023-24056"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2023-24056"},{"type":"REPORT","url":"https://nullprogram.com/blog/2023/01/18/"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2023-24056"}],"affected":[{"package":{"name":"pkgconf","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/pkgconf@0.9.12-1?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.12-1"],"ecosystem_specific":{"binaries":[{"binary_name":"pkgconf","binary_version":"0.9.12-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-24056.json"}},{"package":{"name":"pkgconf","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/pkgconf@0.9.12-6?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.12-6"],"ecosystem_specific":{"binaries":[{"binary_name":"pkgconf","binary_version":"0.9.12-6"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-24056.json"}},{"package":{"name":"pkgconf","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/pkgconf@1.6.3-5?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.6.3-4","1.6.3-5"],"ecosystem_specific":{"binaries":[{"binary_name":"libpkgconf","binary_version":"1.6.3-5"},{"binary_name":"libpkgconf3","binary_version":"1.6.3-5"},{"binary_version":"1.6.3-5","binary_name":"pkgconf"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-24056.json"}},{"package":{"name":"pkgconf","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/pkgconf@1.8.0-1?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.7.4~git20210206+dcf529b-3","1.8.0-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libpkgconf","binary_version":"1.8.0-1"},{"binary_version":"1.8.0-1","binary_name":"libpkgconf3"},{"binary_name":"pkgconf","binary_version":"1.8.0-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-24056.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}