Cryptographic issues in Libgcrypt - CVE-2019-12904
Published: June 20, 2019 / Updated: August 3, 2020
Vulnerability identifier: #VU33175
CSH Severity: Medium
CVSS v4: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2019-12904
CWE-ID: CWE-310
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.
In Libgcrypt 1.8.4, the C implementation of AES is vulnerable to a flush-and-reload side-channel attack because physical addresses are available to other processes. (The C implementation is used on platforms where an assembly-language implementation is unavailable.)
Affected software
Libgcrypt
libgcrypt (Alpine package)
Opensuse
libgcrypt (Alpine package)
Opensuse
How to mitigate CVE-2019-12904
Install update from vendor's website.
Libgcrypt - update to 1.8.5
libgcrypt (Alpine package) - update to 1.8.3-r1
libgcrypt (Alpine package) - update to 1.8.3-r1