chronyd in Chrony before 1.23.1, and possibly 1.24-pre1, generates a syslog message for…
Priority LOW 28CWE-399Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · Partial
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA. Impact type from CWE-399 and the CVSS impact.
Summary
chronyd in Chrony before 1.23.1, and possibly 1.24-pre1, generates a syslog message for each unauthorized cmdmon packet, which allows remote attackers to cause a denial of service (disk consumption) via a large number of invalid packets.
Why it matters now
EPSS 0.02697 86th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
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 · 11
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:tuxfamily:chrony:*:*:*:*:*:*:*:* | up to 1.23-pre1 | Vulnerable | Tuxfamily |
| cpe:2.3:a:tuxfamily:chrony:1.18:*:*:*:*:*:*:* | 1.18 | Vulnerable | Tuxfamily |
| cpe:2.3:a:tuxfamily:chrony:1.19:*:*:*:*:*:*:* | 1.19 | Vulnerable | Tuxfamily |
| cpe:2.3:a:tuxfamily:chrony:1.19-1:*:*:*:*:*:*:* | 1.19-1 | Vulnerable | Tuxfamily |
| cpe:2.3:a:tuxfamily:chrony:1.19.99.1:*:*:*:*:*:*:* | 1.19.99.1 | Vulnerable | Tuxfamily |
| cpe:2.3:a:tuxfamily:chrony:1.19.99.2:*:*:*:*:*:*:* | 1.19.99.2 | Vulnerable | Tuxfamily |
| cpe:2.3:a:tuxfamily:chrony:1.19.99.3:*:*:*:*:*:*:* | 1.19.99.3 | Vulnerable | Tuxfamily |
| cpe:2.3:a:tuxfamily:chrony:1.20:*:*:*:*:*:*:* | 1.20 | Vulnerable | Tuxfamily |
| cpe:2.3:a:tuxfamily:chrony:1.21:*:*:*:*:*:*:* | 1.21 | Vulnerable | Tuxfamily |
| cpe:2.3:a:tuxfamily:chrony:1.21-pre1:*:*:*:*:*:*:* | 1.21-pre1 | Vulnerable | Tuxfamily |
- cpe:2.3:a:tuxfamily:chrony:*:*:*:*:*:*:*:* Versions up to 1.23-pre1 Vulnerable ·Tuxfamily
- cpe:2.3:a:tuxfamily:chrony:1.18:*:*:*:*:*:*:* Versions 1.18 Vulnerable ·Tuxfamily
- cpe:2.3:a:tuxfamily:chrony:1.19:*:*:*:*:*:*:* Versions 1.19 Vulnerable ·Tuxfamily
- cpe:2.3:a:tuxfamily:chrony:1.19-1:*:*:*:*:*:*:* Versions 1.19-1 Vulnerable ·Tuxfamily
- cpe:2.3:a:tuxfamily:chrony:1.19.99.1:*:*:*:*:*:*:* Versions 1.19.99.1 Vulnerable ·Tuxfamily
- cpe:2.3:a:tuxfamily:chrony:1.19.99.2:*:*:*:*:*:*:* Versions 1.19.99.2 Vulnerable ·Tuxfamily
- cpe:2.3:a:tuxfamily:chrony:1.19.99.3:*:*:*:*:*:*:* Versions 1.19.99.3 Vulnerable ·Tuxfamily
- cpe:2.3:a:tuxfamily:chrony:1.20:*:*:*:*:*:*:* Versions 1.20 Vulnerable ·Tuxfamily
- cpe:2.3:a:tuxfamily:chrony:1.21:*:*:*:*:*:*:* Versions 1.21 Vulnerable ·Tuxfamily
- cpe:2.3:a:tuxfamily:chrony:1.21-pre1:*:*:*:*:*:*:* Versions 1.21-pre1 Vulnerable ·Tuxfamily
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2010-0294
- 2026-10-03 Alias added: GHSA-87x4-2c3p-r924
References
More Tuxfamily Chrony vulnerabilities
- TI-2016-01428 chrony before 1.31.2 and 2.x before 2.2.1 do not verify peer associations of symmetric… CVSS 3.0HIGH 8.1
- 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
Sources
- CVE-2010-0294 · CVE Program
- CVE-2010-0294 · NVD
- FIRST EPSS
- GHSA-87x4-2c3p-r924 · GitHub Advisory Database · CC BY 4.0
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