Arch Linux Security Advisory ASA-201904-2

Severity: Critical
Date : 2019-04-05
CVE-ID : CVE-2019-3829 CVE-2019-3836
Package : gnutls
Type : multiple issues
Remote : Yes
Link : https://security.archlinux.org/AVG-945

Summary

The package gnutls before version 3.6.7-1 is vulnerable to multiple
issues including arbitrary code execution and denial of service.

Resolution

Upgrade to 3.6.7-1.

pacman -Syu “gnutls>=3.6.7-1”

The problems have been fixed upstream in version 3.6.7.

Workaround

None.

Description

• CVE-2019-3829 (arbitrary code execution)

A critical memory corruption vulnerability has been found in GnuTLS
versions prior to 3.6.7, in any API backed by verify_crt(), including
gnutls_x509_trust_list_verify_crt() and related routines. Any client or
server that verifies X.509 certificates with GnuTLS is likely affected
and can be compromised by a malicious server or active network
attacker.

• CVE-2019-3836 (denial of service)

An invalid pointer access via malformed TLS1.3 async messages has been
found in GnuTLS versions prior to 3.6.7.

Impact

A remote attacker can execute arbitrary code on a client or server
validating certificates.

References

https://lists.gnupg.org/pipermail/gnutls-help/2019-March/004497.html
https://gitlab.com/gnutls/gnutls/issues/694
https://gitlab.com/gnutls/gnutls/issues/704
https://security.archlinux.org/CVE-2019-3829
https://security.archlinux.org/CVE-2019-3836