{"id":"UBUNTU-CVE-2017-7526","details":"libgcrypt before version 1.7.8 is vulnerable to a cache side-channel attack resulting into a complete break of RSA-1024 while using the left-to-right method for computing the sliding-window expansion. The same attack is believed to work on RSA-2048 with moderately more computation. This side-channel requires that attacker can run arbitrary software on the hardware where the private RSA key is used.","modified":"2026-01-30T01:41:21.922677Z","published":"2017-06-29T00:00:00Z","related":["USN-3347-1","USN-3347-2","USN-3733-1","USN-3733-2"],"upstream":["CVE-2017-7526"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2017-7526"},{"type":"REPORT","url":"https://eprint.iacr.org/2017/627"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-3347-1"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-3347-2"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-3733-1"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-3733-2"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2017-7526"}],"affected":[{"package":{"name":"gnupg","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/gnupg@1.4.16-1ubuntu2.6?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.4.16-1ubuntu2.6"}]}],"versions":["1.4.14-1ubuntu2","1.4.15-1.1ubuntu1","1.4.15-1.1ubuntu2","1.4.15-2ubuntu1","1.4.16-1ubuntu1","1.4.16-1ubuntu2","1.4.16-1ubuntu2.1","1.4.16-1ubuntu2.3","1.4.16-1ubuntu2.4","1.4.16-1ubuntu2.5"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"1.4.16-1ubuntu2.6","binary_name":"gnupg"},{"binary_version":"1.4.16-1ubuntu2.6","binary_name":"gnupg-curl"},{"binary_version":"1.4.16-1ubuntu2.6","binary_name":"gpgv"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2017/UBUNTU-CVE-2017-7526.json"}},{"package":{"name":"libgcrypt11","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/libgcrypt11@1.5.3-2ubuntu4.5?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.5.3-2ubuntu4.5"}]}],"versions":["1.5.0-3ubuntu3","1.5.3-2ubuntu1","1.5.3-2ubuntu4","1.5.3-2ubuntu4.1","1.5.3-2ubuntu4.2","1.5.3-2ubuntu4.3","1.5.3-2ubuntu4.4"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"1.5.3-2ubuntu4.5","binary_name":"libgcrypt11"},{"binary_version":"1.5.3-2ubuntu4.5","binary_name":"libgcrypt11-dev"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2017/UBUNTU-CVE-2017-7526.json"}},{"package":{"name":"gnupg","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/gnupg@1.4.20-1ubuntu3.3?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.4.20-1ubuntu3.3"}]}],"versions":["1.4.18-7ubuntu1","1.4.19-6ubuntu1","1.4.20-1ubuntu1","1.4.20-1ubuntu2","1.4.20-1ubuntu3","1.4.20-1ubuntu3.1","1.4.20-1ubuntu3.2"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"1.4.20-1ubuntu3.3","binary_name":"gnupg"},{"binary_version":"1.4.20-1ubuntu3.3","binary_name":"gnupg-curl"},{"binary_version":"1.4.20-1ubuntu3.3","binary_name":"gpgv"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2017/UBUNTU-CVE-2017-7526.json"}},{"package":{"name":"libgcrypt20","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/libgcrypt20@1.6.5-2ubuntu0.3?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.6.5-2ubuntu0.3"}]}],"versions":["1.6.3-2ubuntu1","1.6.4-3","1.6.4-4","1.6.4-5","1.6.5-2","1.6.5-2ubuntu0.2"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"1.5.4-3+really1.6.5-2ubuntu0.3","binary_name":"libgcrypt11-dev"},{"binary_version":"1.6.5-2ubuntu0.3","binary_name":"libgcrypt20"},{"binary_version":"1.6.5-2ubuntu0.3","binary_name":"libgcrypt20-dev"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2017/UBUNTU-CVE-2017-7526.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N"},{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N"},{"type":"Ubuntu","score":"medium"}]}