Debian: DSA-3185-1 Critical: libgcrypt Side-Channel Attack Details
debian
March 12, 2015
Multiple vulnerabilities were discovered in libgcrypt: CVE-2014-3591
Topics Covered
Summary
CVE-2014-3591
The Elgamal decryption routine was susceptible to a side-channel
attack discovered by researchers of Tel Aviv University. Ciphertext
blinding was enabled to counteract it. Note that this may have a
quite noticeable impact on Elgamal decryption performance.
CVE-2015-0837
The modular exponentiation routine mpi_powm() was susceptible to a
side-channel attack caused by data-dependent timing variations when
accessing its internal pre-computed table.
For the stable distribution (wheezy), these problems have been fixed in
version 1.5.0-5+deb7u3.
We recommend that you upgrade your libgcrypt11 packages.
Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/
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Severity
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Critical
Package: libgcrypt11
CVE ID: CVE-2014-3591 CVE-2015-0837
Topics Covered
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