UBUNTU-CVE-2017-9526

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.

References

Affected packages

Ubuntu:16.04:LTS / libgcrypt20

Package

Name: libgcrypt20
Purl: pkg:deb/ubuntu/libgcrypt20@1.6.5-2ubuntu0.3?arch=source&distro=xenial

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

1.6.5-2ubuntu0.3

Affected versions

1.*

1.6.3-2ubuntu1

1.6.4-3

1.6.4-4

1.6.4-5

1.6.5-2

1.6.5-2ubuntu0.2

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "libgcrypt11-dev",
            "binary_version": "1.5.4-3+really1.6.5-2ubuntu0.3"
        },
        {
            "binary_name": "libgcrypt20",
            "binary_version": "1.6.5-2ubuntu0.3"
        },
        {
            "binary_name": "libgcrypt20-dev",
            "binary_version": "1.6.5-2ubuntu0.3"
        }
    ],
    "availability": "No subscription required"
}