ntpd 4.2.0.a.2004-06-17 4.fc3 Group Permission -u Remote Code Execution

CVSS Meta Temp Score
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CTI Interest Score
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6.6$0-$5k0.00

Summaryinfo

A vulnerability identified as problematic has been detected in ntpd 4.2.0.a.2004-06-17 4.fc3. Affected by this issue is some unknown functionality of the component Group Permission Handler. This manipulation of the argument -u causes Remote Code Execution. This vulnerability is tracked as CVE-2005-2496. The attack is possible to be carried out remotely. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in ntpd 4.2.0.a.2004-06-17 4.fc3 (Network Management Software). It has been declared as critical. Affected by this vulnerability is some unknown functionality of the component Group Permission Handler. The manipulation of the argument -u with an unknown input leads to a remote code execution vulnerability. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

The xntpd ntp (ntpd) daemon before 4.2.0b, when run with the -u option and using a string to specify the group, uses the group ID of the user instead of the group, which causes xntpd to run with different privileges than intended.

The bug was discovered 08/29/2005. The weakness was disclosed 08/29/2005 by Josh Bressers with SuSE.de (Website). The advisory is shared at secunia.com. This vulnerability is known as CVE-2005-2496 since 08/08/2005. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available.

It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 19517 (Network Time Protocol Daemon (ntpd) < 4.2.1 -u Group Permission Weakness Privilege Escalation), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Misc. and running in the context r. The commercial vulnerability scanner Qualys is able to test this issue with plugin 117680 (CentOS Security Update for NTP (CESA-2006:0393)).

Upgrading eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at ntp.isc.org. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published 1 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (22035), Tenable (19517), SecurityFocus (BID 14673†), OSVDB (19055†) and Secunia (SA21464†). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 6.6

VulDB Base Score: 7.3
VulDB Temp Score: 6.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Remote Code Execution
CWE: Unknown
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 19517
Nessus Name: Network Time Protocol Daemon (ntpd) < 4.2.1 -u Group Permission Weakness Privilege Escalation
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 55233
OpenVAS Name: Debian Security Advisory DSA 801-1 (ntp)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Patch: ntp.isc.org

Timelineinfo

08/08/2005 🔍
08/27/2005 +19 days 🔍
08/27/2005 +0 days 🔍
08/29/2005 +2 days 🔍
08/29/2005 +0 days 🔍
08/29/2005 +0 days 🔍
08/29/2005 +0 days 🔍
08/30/2005 +0 days 🔍
09/02/2005 +3 days 🔍
09/05/2005 +3 days 🔍
09/06/2005 +1 days 🔍
08/11/2006 +339 days 🔍
06/30/2025 +6898 days 🔍

Sourcesinfo

Advisory: secunia.com⛔
Researcher: Josh Bressers
Organization: SuSE.de
Status: Confirmed

CVE: CVE-2005-2496 (🔍)
GCVE (CVE): GCVE-0-2005-2496
GCVE (VulDB): GCVE-100-1717

OVAL: 🔍

X-Force: 22035 - NTP incorrect group permissions, High Risk
SecurityFocus: 14673 - NTPD Insecure Privileges Vulnerability
Secunia: 21464 - Red Hat update for ntp, Not Critical
OSVDB: 19055 - NTP ntpd -u Group Permission Weakness
SecurityTracker: 1016679
Vulnerability Center: 9099 - NTPD Insecure Group Options Enables Privilege Escalation, Medium
Vupen: ADV-2005-1561

Entryinfo

Created: 08/30/2005 12:09
Updated: 06/30/2025 04:38
Changes: 08/30/2005 12:09 (97), 07/04/2019 10:19 (1), 06/30/2025 04:38 (18)
Complete: 🔍
Cache ID: 216::103

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