It was discovered that a side channel attack in the EdDSA session key handling in Libgcrypt may result in information disclosure. For the stable distribution (jessie), this problem has been fixed in

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Debian Security Advisory DSA-3880-1                   This email address is being protected from spambots. You need JavaScript enabled to view it.
https://www.debian.org/security/                     Salvatore Bonaccorso
June 14, 2017                         https://www.debian.org/security/faq
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Package        : libgcrypt20
CVE ID         : CVE-2017-9526

It was discovered that a side channel attack in the EdDSA session key
handling in Libgcrypt may result in information disclosure.

For the stable distribution (jessie), this problem has been fixed in
version 1.6.3-2+deb8u3.

For the upcoming stable distribution (stretch), this problem has been
fixed in version 1.7.6-2.

For the unstable distribution (sid), this problem has been fixed in
version 1.7.6-2.

We recommend that you upgrade your libgcrypt20 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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