NVD

CVE-2015-1821 Detail

Modified

This vulnerability has been modified since it was last analyzed by the NVD. It is awaiting reanalysis which may result in further changes to the information provided.

Description

Heap-based buffer overflow in chrony before 1.31.1 allows remote authenticated users to cause a denial of service (chronyd crash) or possibly execute arbitrary code by configuring the (1) NTP or (2) cmdmon access with a subnet size that is indivisible by four and an address with a nonzero bit in the subnet remainder.

Metrics

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.

CVSS 4.0 Severity and Vector Strings:

NIST: NVD

N/A

NVD assessment not yet provided.

CVSS 3.x Severity and Vector Strings:

NIST: NVD

Base Score: N/A

NVD assessment not yet provided.

CVSS 2.0 Severity and Vector Strings:

National Institute of Standards and Technology

NIST: NVD

Base Score: 6.5 MEDIUM

Vector: (AV:N/AC:L/Au:S/C:P/I:P/A:P)

References to Advisories, Solutions, and Tools

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Hyperlink	Resource
http://listengine.tuxfamily.org/chrony.tuxfamily.org/chrony-announce/2015/04/msg00002.html	Patch Vendor Advisory
http://www.debian.org/security/2015/dsa-3222
http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
http://www.securityfocus.com/bid/73955
https://security.gentoo.org/glsa/201507-01

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-119	Improper Restriction of Operations within the Bounds of a Memory Buffer	NIST

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Change History

9 change records found show changes

CVE Modified by Red Hat, Inc. 2/12/2023 7:47:10 PM

Action	Type	Old Value	New Value
Removed	CVSS V2	Red Hat, Inc. (AV:N/AC:M/Au:S/C:P/I:P/A:P)
Changed	Description	An out-of-bounds write flaw was found in the way Chrony stored certain addresses when configuring NTP or cmdmon access. An attacker that has the command key and is allowed to access cmdmon (only localhost is allowed by default) could use this flaw to crash chronyd or, possibly, execute arbitrary code with the privileges of the chronyd process.	Heap-based buffer overflow in chrony before 1.31.1 allows remote authenticated users to cause a denial of service (chronyd crash) or possibly execute arbitrary code by configuring the (1) NTP or (2) cmdmon access with a subnet size that is indivisible by four and an address with a nonzero bit in the subnet remainder.
Removed	Reference	https://access.redhat.com/errata/RHSA-2015:2241 [No Types Assigned]
Removed	Reference	https://access.redhat.com/security/cve/CVE-2015-1821 [No Types Assigned]
Removed	Reference	https://bugzilla.redhat.com/show_bug.cgi?id=1209631 [No Types Assigned]

CVE Modified by Red Hat, Inc. 2/02/2023 3:20:14 PM

Action	Type	Old Value	New Value
Added	CVSS V2		Red Hat, Inc. (AV:N/AC:M/Au:S/C:P/I:P/A:P)
Changed	Description	Heap-based buffer overflow in chrony before 1.31.1 allows remote authenticated users to cause a denial of service (chronyd crash) or possibly execute arbitrary code by configuring the (1) NTP or (2) cmdmon access with a subnet size that is indivisible by four and an address with a nonzero bit in the subnet remainder.	An out-of-bounds write flaw was found in the way Chrony stored certain addresses when configuring NTP or cmdmon access. An attacker that has the command key and is allowed to access cmdmon (only localhost is allowed by default) could use this flaw to crash chronyd or, possibly, execute arbitrary code with the privileges of the chronyd process.
Added	Reference		https://access.redhat.com/errata/RHSA-2015:2241 [No Types Assigned]
Added	Reference		https://access.redhat.com/security/cve/CVE-2015-1821 [No Types Assigned]
Added	Reference		https://bugzilla.redhat.com/show_bug.cgi?id=1209631 [No Types Assigned]

Quick Info

CVE Dictionary Entry:
CVE-2015-1821
NVD Published Date:
04/16/2015
NVD Last Modified:
02/12/2023
Source:
Red Hat, Inc.

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Information Technology Laboratory

National Vulnerability Database

National Vulnerability Database

CVE-2015-1821 Detail

Description

Metrics

References to Advisories, Solutions, and Tools

Weakness Enumeration

Known Affected Software Configurations Switch to CPE 2.2

CPEs loading, please wait.

Change History

CVE Modified by Red Hat, Inc. 5/13/2024 11:31:00 PM

CVE Modified by Red Hat, Inc. 2/12/2023 7:47:10 PM

CVE Modified by Red Hat, Inc. 2/02/2023 3:20:14 PM

CVE Modified by Red Hat, Inc. 6/30/2017 9:29:13 PM

CVE Modified by Red Hat, Inc. 11/28/2016 2:18:44 PM

CVE Modified by Red Hat, Inc. 10/14/2016 10:00:55 PM

Modified Analysis by NIST 4/17/2015 2:07:40 PM

Initial CVE Analysis 4/17/2015 1:55:00 PM

Initial CVE Analysis 4/17/2015 1:48:38 PM

Quick Info