Cryptographic issues in GnuTLS - CVE-2018-10846

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Main Vulnerability Database Vulnerabilities #VU15709

Cryptographic issues in GnuTLS - CVE-2018-10846

Published: November 5, 2018


Vulnerability identifier: #VU15709
CSH Severity: Low
CVSS v4: 6.3 [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]
CVE-ID: CVE-2018-10846
CWE-ID: CWE-310
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to a cache-based side channel in GnuTLS implementation that can lead to recovery of data in cross-VM attack setting. A remote attacker with ability to intercept traffic can recover encrypted data using a combination of "Just in Time" Prime+probe attack in combination with Lucky-13 attack.


Affected software

GnuTLS
gnutls28 (Ubuntu package)
gnutls30
mingw-gnutls
Fedora
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux for Scientific Computing
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux for Power
Opensuse
Dell PowerProtect Cyber Recovery

How to mitigate CVE-2018-10846

Install updates from vendor's website.

GnuTLS - update to 3.6.3
gnutls28 (Ubuntu package) - addressed in versions 3.4.10-4ubuntu1.5, 3.5.18-1ubuntu1.1, 3.6.4-2ubuntu1.2, 3.6.5-2ubuntu1.1
gnutls30 - addressed in versions 3.5.18-1.el6, 3.5.19-1.el6
mingw-gnutls - addressed in versions 3.6.13-1.fc31, 3.6.13-1.fc32
Dell PowerProtect Cyber Recovery - update to 18.1.1.2-8

External References

Related Security Bulletins