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Vulnerability record · CVE-2018-10845 · published 22 August 2018

CVE-2018-10845: Gnutls broken cryptographic algorithm vulnerability

Gnu · Gnutls

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.

5.9 CVSS 3.1 Medium EPSS 3.6% · top 10.8% CWE-385 · CWE-385CWE-327 · Broken cryptographic algorithm
5.9CVSS 3.1 base score, v2 4.3
3.6%EPSS exploitation probability, 30 days
NoNot in CISA KEV
7Affected product versions listed by NVD
20References
17 Jun 2026Last modified by NVD

Description

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.

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

7 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.securityfocus.com/bid/105138 Third Party AdvisoryVDB Entry
https://access.redhat.com/errata/RHSA-2018:3050 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:3505 Broken Link
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10845 Issue TrackingPatchThird Party Advisory
https://eprint.iacr.org/2018/747 Third Party Advisory
https://gitlab.com/gnutls/gnutls/merge_requests/657 PatchThird Party Advisory
https://lists.debian.org/debian-lts-announce/2018/10/msg00022.html Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ILMOWPKMTZAIMK5F32TUMO3
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WDYY3R4F5CUTFAMXH2C5NKY
https://usn.ubuntu.com/3999-1/ Third Party Advisory
http://www.securityfocus.com/bid/105138 Third Party AdvisoryVDB Entry
https://access.redhat.com/errata/RHSA-2018:3050 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:3505 Broken Link
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10845 Issue TrackingPatchThird Party Advisory
https://eprint.iacr.org/2018/747 Third Party Advisory
https://gitlab.com/gnutls/gnutls/merge_requests/657 PatchThird Party Advisory
https://lists.debian.org/debian-lts-announce/2018/10/msg00022.html Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ILMOWPKMTZAIMK5F32TUMO3
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WDYY3R4F5CUTFAMXH2C5NKY
https://usn.ubuntu.com/3999-1/ Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2018-10845), CISA KEV, FIRST EPSS (scores of 2026-10-05). This page is refreshed as NVD updates the record.