gnutls: HMAC-SHA-384 vulnerable to Lucky thirteen attack due to use of wrong constant
Published Aug 22, 2018
5.9
MEDIUMCVSS 3.1
EPSS 3.62%
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.
Affected products
- Vendor n/a Product Gnutls Defaultn/a
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||
|---|---|---|---|---|---|---|
| n/a | Gnutls | n/a |
|
Configuration 2
- 7.0
- 7.0
- 7.0
Configuration 3
- 16.04
- 18.04
- 18.10
- 19.04
Configuration 4
- 31
- 32
Configuration 5
- 8.0
No data.
Red Hat Enterprise Linux 7
gnutls-0:3.3.29-8.el7
Fixed · RHSA-2018:3050
Red Hat Enterprise Linux 5
gnutls
Will not fix
Red Hat Enterprise Linux 6
gnutls
Will not fix
Red Hat Enterprise Linux 8
gnutls
Not affected
Red Hat Enterprise Linux 8
mingw-gnutls
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 7 | gnutls-0:3.3.29-8.el7 | Fixed | RHSA-2018:3050 |
| Red Hat Enterprise Linux 5 | gnutls | Will not fix | n/a |
| Red Hat Enterprise Linux 6 | gnutls | Will not fix | n/a |
| Red Hat Enterprise Linux 8 | gnutls | Not affected | n/a |
| Red Hat Enterprise Linux 8 | mingw-gnutls | Not affected | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
AV:N/AC:M/Au:N/C:P/I:N/A:N
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Table of values (13 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 3.62% (0.03623) | 89.15th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.62% (0.03623) | 88.00th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.89% (0.00889) | 73.88th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.59% (0.00586) | 78.90th | v3 (v2023.03.01) |
| Mar 17, 2024 | 0.59% (0.00586) | 77.67th | v3 (v2023.03.01) |
| Feb 22, 2024 | 0.75% (0.00746) | 80.38th | v3 (v2023.03.01) |
| Jan 13, 2024 | 0.94% (0.00942) | 81.37th | v3 (v2023.03.01) |
| Sep 3, 2023 | 1.57% (0.01570) | 85.67th | v3 (v2023.03.01) |
| Mar 7, 2023 | 1.45% (0.01447) | 84.56th | v3 (v2023.03.01) |
| Mar 6, 2023 | 2.17% (0.02172) | 80.77th | v2 (v2022.01.01) |
| Feb 4, 2022 | 2.17% (0.02172) | 57.73th | v2 (v2022.01.01) |
| Feb 3, 2022 | 2.84% (0.02844) | 63.13th | v5 (v2026.06.15) |
| Apr 14, 2021 | 2.84% (0.02844) | 0.00th | v1 |
References (14)
- http://www.securityfocus.com/bid/105138 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2018:3050 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2018:3505 vendor-advisoryx_refsource_REDHATBroken Link
- https://access.redhat.com/security/cve/CVE-2018-10845 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1582572 Issue Tracking
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10845 x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory
- https://eprint.iacr.org/2018/747 x_refsource_MISCThird Party Advisory
- https://gitlab.com/gnutls/gnutls/merge_requests/657 x_refsource_CONFIRMPatchThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/10/msg00022.html mailing-listx_refsource_MLISTThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ILMOWPKMTZAIMK5F32TUMO34XCABUCFJ/ vendor-advisoryx_refsource_FEDORA
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WDYY3R4F5CUTFAMXH2C5NKYFVDEJLTT7/ vendor-advisoryx_refsource_FEDORA
- https://nvd.nist.gov/vuln/detail/CVE-2018-10845
- https://usn.ubuntu.com/3999-1/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2018-10845
Change history (0)
No recorded changes yet.