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.
Published: 2017-06-11
Score: 5.9 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Debian DSA Debian DSA DSA-3880-1 libgcrypt20 security update
EUVD EUVD EUVD-2017-18457 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.
Ubuntu USN Ubuntu USN USN-3347-1 Libgcrypt vulnerabilities
History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2024-08-05T17:11:02.257Z

Reserved: 2017-06-10T00:00:00.000Z

Link: CVE-2017-9526

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2017-06-11T02:29:00.183

Modified: 2026-05-13T00:24:29.033

Link: CVE-2017-9526

cve-icon Redhat

Severity : Low

Publid Date: 2017-06-01T00:00:00Z

Links: CVE-2017-9526 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses