krb5: reversed strlcpy() allows client to crash the KDC
Published Sep 26, 2019
7.5
HIGHCVSS 3.1
EPSS 4.44%
Description
A flaw was found in, Fedora versions of krb5 from 1.16.1 to, including 1.17.x, in the way a Kerberos client could crash the KDC by sending one of the RFC 4556 "enctypes". A remote unauthenticated user could use this flaw to crash the KDC.
Affected products
-
- Version Fedora versions of krb5 from 1.16.1 to, including 1.17.xStatusaffectedConstraints-
- Version
Configuration 1
- ≥ 1.16.1 · ≤ 1.17.1
Configuration 2
- 29
- 30
- 31
No data.
Red Hat Enterprise Linux 5
krb5
Not affected
Red Hat Enterprise Linux 6
krb5
Not affected
Red Hat Enterprise Linux 7
krb5
Not affected
Red Hat Enterprise Linux 8
krb5
Not affected
Red Hat JBoss Core Services
krb5
Not affected
Red Hat JBoss Enterprise Web Server 2
krb5
Not affected
Red Hat Virtualization 4
redhat-virtualization-host
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | krb5 | Not affected | n/a |
| Red Hat Enterprise Linux 6 | krb5 | Not affected | n/a |
| Red Hat Enterprise Linux 7 | krb5 | Not affected | n/a |
| Red Hat Enterprise Linux 8 | krb5 | Not affected | n/a |
| Red Hat JBoss Core Services | krb5 | Not affected | n/a |
| Red Hat JBoss Enterprise Web Server 2 | krb5 | Not affected | n/a |
| Red Hat Virtualization 4 | redhat-virtualization-host | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This flaw affects the krb5 server only; client-side packages are not affected. This flaw does not affect any krb5 packages shipped with Red Hat products.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
AV:N/AC:L/Au:N/C:N/I:N/A:P
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 v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (28 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 4.44% (0.04436) | 91.08th | v5 (v2026.06.15) |
| Jun 15, 2026 | 4.44% (0.04436) | 90.11th | v5 (v2026.06.15) |
| May 25, 2025 | 11.70% (0.11696) | 93.29th | v4 (v2025.03.14) |
| Apr 23, 2025 | 9.33% (0.09334) | 92.28th | v4 (v2025.03.14) |
| Apr 4, 2025 | 12.13% (0.12132) | 93.21th | v4 (v2025.03.14) |
| Mar 31, 2025 | 16.64% (0.16638) | 94.36th | v4 (v2025.03.14) |
| Mar 30, 2025 | 20.15% (0.20153) | 95.02th | v4 (v2025.03.14) |
| Mar 29, 2025 | 15.79% (0.15794) | 91.26th | v4 (v2025.03.14) |
| Mar 26, 2025 | 20.15% (0.20153) | 94.96th | v4 (v2025.03.14) |
| Mar 19, 2025 | 16.25% (0.16252) | 94.03th | v4 (v2025.03.14) |
| Mar 17, 2025 | 19.09% (0.19089) | 94.86th | v4 (v2025.03.14) |
| Jul 20, 2024 | 0.50% (0.00501) | 76.57th | v3 (v2023.03.01) |
| May 11, 2024 | 0.50% (0.00501) | 76.22th | v3 (v2023.03.01) |
| May 3, 2024 | 0.65% (0.00649) | 79.24th | v3 (v2023.03.01) |
| Jan 20, 2024 | 0.65% (0.00649) | 77.15th | v3 (v2023.03.01) |
| Sep 2, 2023 | 0.66% (0.00658) | 76.93th | v3 (v2023.03.01) |
| Aug 17, 2023 | 0.58% (0.00576) | 75.16th | v3 (v2023.03.01) |
| Jul 16, 2023 | 0.60% (0.00600) | 75.62th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.50% (0.00502) | 72.74th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.32% (0.01319) | 71.27th | v2 (v2022.01.01) |
| Feb 23, 2023 | 1.32% (0.01319) | 71.23th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.32% (0.01319) | 69.22th | v2 (v2022.01.01) |
| Mar 25, 2022 | 8.93% (0.08934) | 83.36th | v2 (v2022.01.01) |
| Feb 4, 2022 | 7.18% (0.07176) | 80.33th | v2 (v2022.01.01) |
| Feb 3, 2022 | 6.66% (0.06657) | 83.16th | v1 |
| Jan 6, 2022 | 6.66% (0.06657) | 83.00th | v1 |
| Sep 1, 2021 | 1.57% (0.01565) | 73.12th | v1 |
| Apr 14, 2021 | 1.57% (0.01565) | 0.00th | v1 |
References (10)
- https://access.redhat.com/security/cve/CVE-2019-14844 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1753589 Issue Tracking
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14844 x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory
- https://github.com/krb5/krb5/pull/981 x_refsource_MISCPatchThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/54ZYKEJZ77BXZWGF4NEVKC33ESVROEYC/ vendor-advisoryx_refsource_FEDORA
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/N4LS5PIJOCNOUZGLO2OBT6GY334PUOSW/ vendor-advisoryx_refsource_FEDORA
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TDE2QOKK4I4TV4WV74ZQWICZ4HJN2MOK/ vendor-advisoryx_refsource_FEDORA
- https://nvd.nist.gov/vuln/detail/CVE-2019-14844
- https://security.netapp.com/advisory/ntap-20220325-0003/ x_refsource_CONFIRMThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2019-14844
Change history (0)
No recorded changes yet.