Chrony
CVE-2015-1822
MEDIUM
Vulnerability Assessment
| Weakness |
CWE
|
| Impact | CVSS score of 6.5 (MEDIUM). Attack characteristics: network attack vector, low complexity. EPSS exploitation probability: 2.11%. |
| Exploit ScenarioDerived | This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the medium-severity affected system. |
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Alert meAnalysisAI
chrony before 1.31.1 does not initialize the last "next" pointer when saving unacknowledged replies to command requests, which allows remote authenticated users to cause a denial of service. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity.
RemediationAI
A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.
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Technical ContextAI · show details
This vulnerability is classified under CWE-17. chrony before 1.31.1 does not initialize the last "next" pointer when saving unacknowledged replies to command requests, which allows remote authenticated users to cause a denial of service (uninitialized pointer dereference and daemon crash) or possibly execute arbitrary code via a large number of command requests. Affected products include: Debian Debian Linux, Tuxfamily Chrony. Version information: before 1.31.1.
Severity by source
AV:N/AC:L/Au:S/C:P/I:P/A:P
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
DescriptionCVE.org
chrony before 1.31.1 does not initialize the last "next" pointer when saving unacknowledged replies to command requests, which allows remote authenticated users to cause a denial of service (uninitialized pointer dereference and daemon crash) or possibly execute arbitrary code via a large number of command requests.
Threat Intelligence Overview
NVD
CVE.org
EPSS
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.
Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.
Affected Products (CPE)CVE.org
chrony before 1.31.2 and 2.x before 2.2.1 do not verify peer associations of symmetric keys when authenticating packets,
Heap-based buffer overflow in chrony before 1.31.1 allows remote authenticated users to cause a denial of service (chron
A flaw was found in chrony versions before 3.5.1 when creating the PID file under the /var/run/chrony folder. Rated medi
Multiple integer overflows in pktlength.c in Chrony before 1.29 allow remote attackers to cause a denial of service (cra
cmdmon.c in Chrony before 1.29 allows remote attackers to obtain potentially sensitive information from stack memory via
GitHub PoC
Exploit-DB