Vulnerability identifier: #VU15707
Vulnerability risk: Low
CVSSv3.1: 3.5 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-327
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
GnuTLS
Universal components / Libraries /
Libraries used by multiple products
Vendor: GnuTLS
Description
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to usage of an insecure implementation of HMAC-SHA-256 algorithm vulnerable to a Lucky thirteen style attack. A remote attacker with ability to intercept traffic can recover encrypted data.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
GnuTLS: 0.0.3 - 3.6.2
External links
http://www.securityfocus.com/bid/105138
http://access.redhat.com/errata/RHSA-2018:3050
http://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10844
http://eprint.iacr.org/2018/747
http://gitlab.com/gnutls/gnutls/merge_requests/657
http://lists.debian.org/debian-lts-announce/2018/10/msg00022.html
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.