{"id":"UBUNTU-CVE-2024-13939","details":"String::Compare::ConstantTime for Perl through 0.321 is vulnerable to timing attacks that allow an attacker to guess the length of a secret string. As stated in the documentation: \"If the lengths of the strings are different, because equals returns false right away the size of the secret string may be leaked (but not its contents).\" This is similar to CVE-2020-36829","modified":"2026-05-20T16:16:30.861102174Z","published":"2025-03-28T03:15:00Z","upstream":["CVE-2024-13939"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2024-13939"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2024-13939"},{"type":"REPORT","url":"https://metacpan.org/release/FRACTAL/String-Compare-ConstantTime-0.321/view/lib/String/Compare/ConstantTime.pm#TIMING-SIDE-CHANNEL"}],"affected":[{"package":{"name":"libstring-compare-constanttime-perl","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/libstring-compare-constanttime-perl?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.310-1","0.311-1","0.311-1build1"],"ecosystem_specific":{"binaries":[{"binary_name":"libstring-compare-constanttime-perl","binary_version":"0.311-1build1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2024/UBUNTU-CVE-2024-13939.json"}},{"package":{"name":"libstring-compare-constanttime-perl","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/libstring-compare-constanttime-perl?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.312-1build1"],"ecosystem_specific":{"binaries":[{"binary_version":"0.312-1build1","binary_name":"libstring-compare-constanttime-perl"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2024/UBUNTU-CVE-2024-13939.json"}},{"package":{"name":"libstring-compare-constanttime-perl","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/libstring-compare-constanttime-perl?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.321-1","0.321-1build1"],"ecosystem_specific":{"binaries":[{"binary_name":"libstring-compare-constanttime-perl","binary_version":"0.321-1build1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2024/UBUNTU-CVE-2024-13939.json"}},{"package":{"name":"libstring-compare-constanttime-perl","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/libstring-compare-constanttime-perl?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.321-1build2","0.321-1build3"],"ecosystem_specific":{"binaries":[{"binary_name":"libstring-compare-constanttime-perl","binary_version":"0.321-1build3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2024/UBUNTU-CVE-2024-13939.json"}},{"package":{"name":"libstring-compare-constanttime-perl","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/libstring-compare-constanttime-perl?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.321-2build1","0.321-2build2","0.321-2build3","0.321-2build4"],"ecosystem_specific":{"binaries":[{"binary_name":"libstring-compare-constanttime-perl","binary_version":"0.321-2build4"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2024/UBUNTU-CVE-2024-13939.json"}},{"package":{"name":"libstring-compare-constanttime-perl","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/libstring-compare-constanttime-perl?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.321-2build5","0.321-3"],"ecosystem_specific":{"binaries":[{"binary_name":"libstring-compare-constanttime-perl","binary_version":"0.321-3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2024/UBUNTU-CVE-2024-13939.json"}},{"package":{"name":"libstring-compare-constanttime-perl","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/libstring-compare-constanttime-perl?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.321-3"],"ecosystem_specific":{"binaries":[{"binary_name":"libstring-compare-constanttime-perl","binary_version":"0.321-3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2024/UBUNTU-CVE-2024-13939.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:N/A:N"},{"type":"Ubuntu","score":"medium"}]}