Arch Linux Security Advisory ASA-201706-12

Severity: Medium
Date : 2017-06-13
CVE-ID : CVE-2017-7507
Package : gnutls
Type : denial of service
Remote : Yes
Link : https://security.archlinux.org/AVG-294

Summary

The package gnutls before version 3.5.13-1 is vulnerable to denial of
service.

Resolution

Upgrade to 3.5.13-1.

pacman -Syu “gnutls>=3.5.13-1”

The problem has been fixed upstream in version 3.5.13.

Workaround

None.

Description

A security issue has been found in GnuTLS < 3.5.13, where decoding a
status request TLS extension that has a non-empty responder IDs list
could lead to a crash due to a null pointer dereference.

Impact

A remote attacker can crash a vulnerable TLS server by sending a
crafted status_request extension in a ClientHello message.

References

https://www.gnutls.org/security.html#GNUTLS-SA-2017-4
https://bugzilla.redhat.com/show_bug.cgi?id=1454621
https://security.archlinux.org/CVE-2017-7507