CVE-2015-1853
MEDIUM
6.5
CVSS Score
Published: December 9, 2019 at 06:53 PM UTC
Updated: June 17, 2026 at 12:23 AM UTC
2 products affected across 2 vendorsChronyChrony
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Severity
MEDIUM6.5
Exploit prediction
EPSS 2%
Description
chrony before 1.31.1 does not properly protect state variables in authenticated symmetric NTP associations, which allows remote attackers with knowledge of NTP peering to cause a denial of service (inability to synchronize) via random timestamps in crafted NTP data packets.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
v < 1.31.1
Affected range stops below 1.31.1, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
References (2)
x_refsource_MISCRelease NotesVendor Advisory
Source: [email protected]
http://chrony.tuxfamily.org/News.htmlVendor Advisoryx_refsource_GENTOOx_refsource_MISCThird Party Advisory
Source: [email protected]
https://security.gentoo.org/glsa/201507-01CVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- NONE
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
NVD-CWE-Other
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