CVE-2018-10844
It was found that the GnuTLS implementation of HMAC-SHA-256 was vulnerable to a Lucky thirteen style attack.
Does this matter?
Lower severity and a low EPSS score (3.58%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 5.9 MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 3.58% probability · 89th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-385, CWE-327
- Affected
- gnu/gnutls · redhat/enterprise linux desktop · redhat/enterprise linux server · redhat/enterprise linux workstation · canonical/ubuntu linux · fedoraproject/fedora · debian/debian linux
- Source
- secalert@redhat.com
EPSS 3.6% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://www.securityfocus.com/bid/105138Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2018:3050Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:3505Broken Link
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10844Issue Tracking, Patch, Third Party Advisory
- https://eprint.iacr.org/2018/747Third Party Advisory
- https://gitlab.com/gnutls/gnutls/merge_requests/657Issue Tracking, Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/10/msg00022.htmlMailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ILMOWPKMTZAIMK5F32TUMO34XCABUCFJ/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WDYY3R4F5CUTFAMXH2C5NKYFVDEJLTT7/
- https://usn.ubuntu.com/3999-1/Third Party Advisory
- http://www.securityfocus.com/bid/105138Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2018:3050Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:3505Broken Link
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10844Issue Tracking, Patch, Third Party Advisory
- https://eprint.iacr.org/2018/747Third Party Advisory
- https://gitlab.com/gnutls/gnutls/merge_requests/657Issue Tracking, Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/10/msg00022.htmlMailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ILMOWPKMTZAIMK5F32TUMO34XCABUCFJ/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WDYY3R4F5CUTFAMXH2C5NKYFVDEJLTT7/
- https://usn.ubuntu.com/3999-1/Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.