UBUNTU-CVE-2017-9526

Source
https://ubuntu.com/security/CVE-2017-9526
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2017/UBUNTU-CVE-2017-9526.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2017-9526
Upstream
Downstream
Related
Published
2017-06-10T00:00:00Z
Modified
2025-07-18T16:44:00Z
Severity
  • 5.9 (Medium) CVSS_V3 - CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N CVSS Calculator
  • Ubuntu - low
Summary
[none]
Details

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

{
    "availability": "No subscription required",
    "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-dbgsym",
            "binary_version": "1.6.5-2ubuntu0.3"
        },
        {
            "binary_name": "libgcrypt20-dev",
            "binary_version": "1.6.5-2ubuntu0.3"
        },
        {
            "binary_name": "libgcrypt20-dev-dbgsym",
            "binary_version": "1.6.5-2ubuntu0.3"
        },
        {
            "binary_name": "libgcrypt20-doc",
            "binary_version": "1.6.5-2ubuntu0.3"
        },
        {
            "binary_name": "libgcrypt20-udeb",
            "binary_version": "1.6.5-2ubuntu0.3"
        },
        {
            "binary_name": "libgcrypt20-udeb-dbgsym",
            "binary_version": "1.6.5-2ubuntu0.3"
        }
    ]
}