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Ubuntu: USN-3347-1 (CVE-2017-9526): Libgcrypt vulnerabilities

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Ubuntu: USN-3347-1 (CVE-2017-9526): Libgcrypt vulnerabilities

Severity
4
CVSS
(AV:N/AC:M/Au:N/C:P/I:N/A:N)
Published
06/10/2017
Created
07/25/2018
Added
07/04/2017
Modified
09/12/2020

Description

In Libgcrypt before 1.7.7, an attacker who learns the EdDSA session key (from side-channel observation during the signing process) can easily recover the long-term secret key. 1.7.7 makes a cipher/ecc-eddsa.c change to store this session key in secure memory, to ensure that constant-time point operations are used in the MPI library.

Solution(s)

  • ubuntu-upgrade-libgcrypt11
  • ubuntu-upgrade-libgcrypt20

References

  • USN-3347-1
  • USN-3347-2
  • USN-3733-1
  • USN-3733-2
  • DSA-3880
  • 99046
  • CVE-2017-9526
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