Cache Side-Channel Attack on libgcrypt: Complete Break of RSA-1024 and Potential Impact on RSA-2048

CVE-2017-7526 · MEDIUM Severity

AV:N/AC:M/AU:N/C:P/I:N/A:N

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.

Learn more about our Web Application Penetration Testing UK.