CVE-2018-10844 Weak cryptography in gnutls

What is CVE-2018-10844?

CVE-2018-10844 is a medium-severity vulnerability in Canonical Ubuntu Linux, published on 22 Aug 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

It was found that the GnuTLS implementation of HMAC-SHA-256 was vulnerable to a Lucky thirteen style attack. Remote attackers could use this flaw to conduct distinguishing attacks and plaintext-recovery attacks via statistical analysis of timing data using crafted packets.

Weakness: CWE-327, CWE-385

Which versions are affected by CVE-2018-10844?

It affects 7 products.

Products include Canonical Ubuntu Linux, Debian Debian Linux, Fedoraproject Fedora, Gnu Gnutls, Redhat Enterprise Linux Desktop, Redhat Enterprise Linux Server and 1 more.

How do I fix CVE-2018-10844?

Upgrade to a fixed version.

Is CVE-2018-10844 being exploited?

There is no known exploitation of CVE-2018-10844 in the wild and no public exploit code.

Other vulnerabilities in Canonical Ubuntu Linux

• CVE-2020-11651 SaltStack Salt Authentication Bypass Exploited Critical 9.8
• CVE-2020-7247 OpenSMTPD Remote Code Execution Exploited Critical 9.8
• CVE-2019-16928 Exim Out-of-bounds Write Exploited Critical 9.8
• CVE-2018-6789 Exim Buffer Overflow Exploited Critical 9.8
• CVE-2015-2590 Oracle Java SE and Java SE Embedded Remote Code Execution Exploited Critical 9.8

All Canonical Ubuntu Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2018-10844, GHSA-9779-jfg9-frm3, UBUNTU-CVE-2018-10844.