Description
The mpi_powm function in Libgcrypt before 1.6.3 and GnuPG before 1.4.19 allows attackers to obtain sensitive information by leveraging timing differences when accessing a pre-computed table during modular exponentiation, related to a "Last-Level Cache Side-Channel Attack."
Affected products
- gnu / GnuPGbefore 1.4.19 – before 1.4.19
- gnu / Libgcryptbefore 1.6.3 – before 1.6.3
References
- VENDOR_ADVISORYhttp://www.debian.org/security/2015/dsa-3184
- VENDOR_ADVISORYhttp://www.debian.org/security/2015/dsa-3185
- MAILING_LISThttps://lists.gnupg.org/pipermail/gnupg-announce/2015q1/000363.html
- MAILING_LISThttps://lists.gnupg.org/pipermail/gnupg-announce/2015q1/000364.html
- MISChttps://ieeexplore.ieee.org/document/7163050