Side-channel attack in Libgcrypt - CVE-2017-9526
Published: July 3, 2017 / Updated: July 4, 2017
Vulnerability identifier: #VU7299
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2017-9526
CWE-ID: CWE-310
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: GNU
Affected software:
Libgcrypt
Libgcrypt
Detailed vulnerability description
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists in libgcrypt's EdDSA implementation. An attacker who learns the EdDSA session key (from side-channel observation during the signing process) can easily recover the long-term secret key.
The vulnerability exists in libgcrypt's EdDSA implementation. An attacker who learns the EdDSA session key (from side-channel observation during the signing process) can easily recover the long-term secret key.
How to mitigate CVE-2017-9526
Update to version 1.7.7.