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.
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{ "availability": "No subscription required", "ubuntu_priority": "medium", "binaries": [ { "libgcrypt11-dbg": "1.5.3-2ubuntu4.5", "libgcrypt11-udeb-dbgsym": "1.5.3-2ubuntu4.5", "libgcrypt11-dbgsym": "1.5.3-2ubuntu4.5", "libgcrypt11-doc": "1.5.3-2ubuntu4.5", "libgcrypt11-dev": "1.5.3-2ubuntu4.5", "libgcrypt11-udeb": "1.5.3-2ubuntu4.5", "libgcrypt11-dev-dbgsym": "1.5.3-2ubuntu4.5", "libgcrypt11": "1.5.3-2ubuntu4.5" } ] }
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{ "availability": "No subscription required", "ubuntu_priority": "medium", "binaries": [ { "libgcrypt20-udeb-dbgsym": "1.6.5-2ubuntu0.3", "libgcrypt20-doc": "1.6.5-2ubuntu0.3", "libgcrypt20": "1.6.5-2ubuntu0.3", "libgcrypt20-dev": "1.6.5-2ubuntu0.3", "libgcrypt11-dev": "1.5.4-3+really1.6.5-2ubuntu0.3", "libgcrypt20-dev-dbgsym": "1.6.5-2ubuntu0.3", "libgcrypt20-dbgsym": "1.6.5-2ubuntu0.3", "libgcrypt20-udeb": "1.6.5-2ubuntu0.3" } ] }