chrony before 1.31.2 and 2.x before 2.2.1 do not verify peer associations of symmetric…
Priority MEDIUM 41CWE-254Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Will not fix Red Hat: no fix planned
Attack profile from CVSS 3.0 · NVD. Fix status from CNA and Red Hat.
Summary
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."
Why it matters now
EPSS 0.03035 87th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Will not fix Red Hat: no fix planned
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 5
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:tuxfamily:chrony:*:*:*:*:*:*:*:* | up to 1.31.1 | Vulnerable | Tuxfamily |
| cpe:2.3:a:tuxfamily:chrony:2.0:*:*:*:*:*:*:* | 2.0 | Vulnerable | Tuxfamily |
| cpe:2.3:a:tuxfamily:chrony:2.1:*:*:*:*:*:*:* | 2.1 | Vulnerable | Tuxfamily |
| cpe:2.3:a:tuxfamily:chrony:2.1.1:*:*:*:*:*:*:* | 2.1.1 | Vulnerable | Tuxfamily |
| cpe:2.3:a:tuxfamily:chrony:2.2:*:*:*:*:*:*:* | 2.2 | Vulnerable | Tuxfamily |
- cpe:2.3:a:tuxfamily:chrony:*:*:*:*:*:*:*:* Versions up to 1.31.1 Vulnerable ·Tuxfamily
- cpe:2.3:a:tuxfamily:chrony:2.0:*:*:*:*:*:*:* Versions 2.0 Vulnerable ·Tuxfamily
- cpe:2.3:a:tuxfamily:chrony:2.1:*:*:*:*:*:*:* Versions 2.1 Vulnerable ·Tuxfamily
- cpe:2.3:a:tuxfamily:chrony:2.1.1:*:*:*:*:*:*:* Versions 2.1.1 Vulnerable ·Tuxfamily
- cpe:2.3:a:tuxfamily:chrony:2.2:*:*:*:*:*:*:* Versions 2.2 Vulnerable ·Tuxfamily
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Will not fix |
Timeline
- 2026-10-02 Threatist record created from CVE-2016-1567
- 2026-10-03 Alias added: GHSA-vwxj-hm98-qj7v
References
More Tuxfamily Chrony vulnerabilities
- TI-2015-01638 Heap-based buffer overflow in chrony before 1.31.1 allows remote authenticated users to… CVSS 2.0MEDIUM 6.5
- TI-2015-01639 chrony before 1.31.1 does not initialize the last "next" pointer when saving… CVSS 2.0MEDIUM 6.5
- TI-2015-01664 chrony before 1.31.1 does not properly protect state variables in authenticated symmetric… CVSS 3.1MEDIUM 6.5
- TI-2012-03844 Multiple integer overflows in pktlength.c in Chrony before 1.29 allow remote attackers to… CVSS 2.0MEDIUM 5.0
- TI-2012-03845 cmdmon.c in Chrony before 1.29 allows remote attackers to obtain potentially sensitive… CVSS 2.0MEDIUM 5.0
- TI-2010-00281 chronyd in Chrony before 1.23.1, and possibly 1.24-pre1, generates a syslog message for… CVSS 2.0MEDIUM 5.0
Sources
- CVE-2016-1567 · CVE Program
- CVE-2016-1567 · NVD
- FIRST EPSS
- GHSA-vwxj-hm98-qj7v · GitHub Advisory Database · CC BY 4.0
- CVE-2016-1567 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences