VDB-65440 · CVE-2012-4503 · DSA-2760

Tuxfamily Chrony up to 1.28 sed Command cmdmon.c handle_client_accesses information disclosure

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.1	$0-$5k	0.00

A vulnerability classified as problematic was found in Tuxfamily Chrony up to 1.28. This vulnerability affects the function handle_client_accesses of the file cmdmon.c of the component sed Command. The manipulation with an unknown input leads to a information disclosure vulnerability. The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality. CVE summarizes:

cmdmon.c in Chrony before 1.29 allows remote attackers to obtain potentially sensitive information from stack memory via vectors related to (1) an invalid subnet in a RPY_SUBNETS_ACCESSED command to the handle_subnets_accessed function or (2) a RPY_CLIENT_ACCESSES command to the handle_client_accesses function when client logging is disabled, which causes uninitialized data to be included in a reply.

The weakness was published 11/05/2013 as not defined mailinglist post (oss-sec). The advisory is shared for download at seclists.org. This vulnerability was named CVE-2012-4503. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1592.

The vulnerability scanner Nessus provides a plugin with the ID 69960 (Debian DSA-2760-1 : chrony - several vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks.

Upgrading to version 1.0 eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (86341) and Tenable (69960). Similar entry is available at 65439.

Productinfo

Vendor

Tuxfamily

Name

Chrony

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	unlock	unlock	unlock	unlock
Today	unlock	unlock	unlock	unlock

Nessus ID: 69960
Nessus Name: Debian DSA-2760-1 : chrony - several vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 892760
OpenVAS Name: Debian Security Advisory DSA 2760-1 (chrony - several vulnerabilities
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Chrony 1.0
Patch: c6fdeeb6bb0b17dc28c19ae492c4a1c498e54ea3

Timelineinfo

08/21/2012 🔍
08/08/2013 +352 days 🔍
08/20/2013 +12 days 🔍
11/05/2013 +77 days 🔍
11/05/2013 +0 days 🔍
03/24/2015 +504 days 🔍
01/10/2022 +2484 days 🔍

Sourcesinfo

Advisory: DSA-2760
Status: Not defined
Confirmation: 🔍

CVE: CVE-2012-4503 (🔍)
OVAL: 🔍

X-Force: 86341
Vulnerability Center: 41135 - Chrony 1.27 -1.28 Remote DoS Vulnerability via Authentication Request (CVE-2012-4503), Medium
SecurityFocus: 61703

See also: 🔍

Entryinfo

Created: 03/24/2015 15:54
Updated: 01/10/2022 09:59
Changes: 03/24/2015 15:54 (67), 05/09/2017 09:05 (2), 01/10/2022 09:54 (6), 01/10/2022 09:55 (1), 01/10/2022 09:59 (2)
Complete: 🔍