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stack.watch can notify you when security vulnerabilities are reported in Gnutls. You can add multiple products that you use with Gnutls to create your own personal software stack watcher.

By the Year

In 2020 there have been 1 vulnerability in Gnutls with an average score of 7.4 out of ten. Last year Gnutls had 2 security vulnerabilities published. Right now, Gnutls is on track to have less security vulerabilities in 2020 than it did last year. Last year, the average CVE base score was greater by 0.10

Year Vulnerabilities Average Score
2020 1 7.40
2019 2 7.50
2018 4 5.75

It may take a day or so for new Gnutls vulnerabilities to show up. Additionally vulnerabilities may be tagged under a different product or component name.

Latest Gnutls Security Vulnerabilities

GnuTLS 3.6.x before 3.6.14 uses incorrect cryptography for encrypting a session ticket (a loss of confidentiality in TLS 1.2

CVE-2020-13777 7.4 - High - June 04, 2020

GnuTLS 3.6.x before 3.6.14 uses incorrect cryptography for encrypting a session ticket (a loss of confidentiality in TLS 1.2, and an authentication bypass in TLS 1.3). The earliest affected version is 3.6.4 (2018-09-24) because of an error in a 2018-09-18 commit. Until the first key rotation, the TLS server always uses wrong data in place of an encryption key derived from an application.

Use of a Broken or Risky Cryptographic Algorithm

It was discovered in gnutls before version 3.6.7 upstream

CVE-2019-3836 7.5 - High - April 01, 2019

It was discovered in gnutls before version 3.6.7 upstream that there is an uninitialized pointer access in gnutls versions 3.6.3 or later which can be triggered by certain post-handshake messages.

Access of Uninitialized Pointer

A vulnerability was found in gnutls versions from 3.5.8 before 3.6.7

CVE-2019-3829 7.5 - High - March 27, 2019

A vulnerability was found in gnutls versions from 3.5.8 before 3.6.7. A memory corruption (double free) vulnerability in the certificate verification API. Any client or server application that verifies X.509 certificates with GnuTLS 3.5.8 or later is affected.

Double-free

A Bleichenbacher type side-channel based padding oracle attack was found in the way gnutls handles verification of RSA decrypted PKCS#1 v1.5 data

CVE-2018-16868 5.6 - Medium - December 03, 2018

A Bleichenbacher type side-channel based padding oracle attack was found in the way gnutls handles verification of RSA decrypted PKCS#1 v1.5 data. An attacker who is able to run process on the same physical core as the victim process, could use this to extract plaintext or in some cases downgrade any TLS connections to a vulnerable server.

Cryptographic Issues

It was found that the GnuTLS implementation of HMAC-SHA-256 was vulnerable to a Lucky thirteen style attack

CVE-2018-10844 5.9 - Medium - August 22, 2018

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.

Use of a Broken or Risky Cryptographic Algorithm

It was found that the GnuTLS implementation of HMAC-SHA-384 was vulnerable to a Lucky thirteen style attack

CVE-2018-10845 5.9 - Medium - August 22, 2018

It was found that the GnuTLS implementation of HMAC-SHA-384 was vulnerable to a Lucky thirteen style attack. Remote attackers could use this flaw to conduct distinguishing attacks and plain text recovery attacks via statistical analysis of timing data using crafted packets.

Use of a Broken or Risky Cryptographic Algorithm

A cache-based side channel in GnuTLS implementation that leads to plain text recovery in cross-VM attack setting was found

CVE-2018-10846 5.6 - Medium - August 22, 2018

A cache-based side channel in GnuTLS implementation that leads to plain text recovery in cross-VM attack setting was found. An attacker could use a combination of "Just in Time" Prime+probe attack in combination with Lucky-13 attack to recover plain text using crafted packets.

Use of a Broken or Risky Cryptographic Algorithm

The "GNUTLS_KEYLOGFILE" environment variable in gnutls 3.4.12

CVE-2016-4456 7.5 - High - August 08, 2017

The "GNUTLS_KEYLOGFILE" environment variable in gnutls 3.4.12 allows remote attackers to overwrite and corrupt arbitrary files in the filesystem.

Improper Input Validation