chrony: missing key check allows impersonation between authenticated peers (VU#357792)
Published Jan 26, 2016
8.1
HIGHCVSS 3.0
EPSS 2.62%
Description
chrony before 1.31.2 and 2.x before 2.2.1 do not verify peer associations of symmetric keys when authenticating packets, which might allow remote attackers to conduct impersonation attacks via an arbitrary trusted key, aka a "skeleton key."
Affected products
No data.
No data.
Red Hat Enterprise Linux 6
chrony
Will not fix
Red Hat Enterprise Linux 7
chrony
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | chrony | Will not fix | n/a |
| Red Hat Enterprise Linux 7 | chrony | Will not fix | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
Red Hat Product Security has rated this issue as having Low security impact. This issue is not currently planned to be addressed in future updates. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
AV:N/AC:M/Au:N/C:P/I:P/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
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (13 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 2.62% (0.02618) | 84.91th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.64% (0.02640) | 83.55th | v5 (v2026.06.15) |
| Feb 26, 2026 | 0.41% (0.00413) | 61.07th | v4 (v2025.03.14) |
| Mar 30, 2025 | 1.67% (0.01669) | 80.42th | v4 (v2025.03.14) |
| Mar 29, 2025 | 5.25% (0.05249) | 82.92th | v4 (v2025.03.14) |
| Mar 17, 2025 | 1.67% (0.01669) | 80.85th | v4 (v2025.03.14) |
| Dec 12, 2024 | 1.46% (0.01458) | 87.24th | v3 (v2023.03.01) |
| May 8, 2024 | 1.46% (0.01458) | 86.62th | v3 (v2023.03.01) |
| Mar 7, 2023 | 1.46% (0.01458) | 84.62th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.21% (0.01213) | 66.61th | v2 (v2022.01.01) |
| Feb 17, 2023 | 1.21% (0.01213) | 66.22th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.21% (0.01213) | 64.21th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.21% (0.01213) | 40.54th | v2 (v2022.01.01) |
References (8)
- http://chrony.tuxfamily.org/news.html#_20_jan_2016_chrony_2_2_1_and_chrony_1_31_2_released x_refsource_CONFIRMVendor Advisory
- http://lists.fedoraproject.org/pipermail/package-announce/2016-February/176559.html vendor-advisoryx_refsource_FEDORA
- http://lists.fedoraproject.org/pipermail/package-announce/2016-January/175969.html vendor-advisoryx_refsource_FEDORAPatch
- http://www.talosintel.com/reports/TALOS-2016-0071/ x_refsource_MISCExploit
- https://access.redhat.com/security/cve/CVE-2016-1567 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1297472 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2016-1567
- https://www.cve.org/CVERecord?id=CVE-2016-1567
| Link | Providers | Tags |
|---|---|---|
| http://chrony.tuxfamily.org/news.html#_20_jan_2016_chrony_2_2_1_and_chrony_1_31_2_released | x_refsource_CONFIRMVendor Advisory | |
| http://lists.fedoraproject.org/pipermail/package-announce/2016-February/176559.html | vendor-advisoryx_refsource_FEDORA | |
| http://lists.fedoraproject.org/pipermail/package-announce/2016-January/175969.html | vendor-advisoryx_refsource_FEDORAPatch | |
| http://www.talosintel.com/reports/TALOS-2016-0071/ | x_refsource_MISCExploit | |
| https://access.redhat.com/security/cve/CVE-2016-1567 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1297472 | Issue Tracking | |
| https://nvd.nist.gov/vuln/detail/CVE-2016-1567 | ||
| https://www.cve.org/CVERecord?id=CVE-2016-1567 |
Change history (0)
No recorded changes yet.