nfs-utils up to 1.0.3 Mountd xlog off-by-one

CVSS Meta Temp Score
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CTI Interest Score
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9.5$0-$5k0.00

Summaryinfo

A vulnerability marked as critical has been reported in nfs-utils up to 1.0.3. The affected element is the function xlog of the component Mountd. The manipulation leads to off-by-one. This vulnerability is referenced as CVE-2003-0252. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as very critical, has been found in nfs-utils up to 1.0.3. This issue affects the function xlog of the component Mountd. The manipulation with an unknown input leads to a off-by-one vulnerability. Using CWE to declare the problem leads to CWE-193. A product calculates or uses an incorrect maximum or minimum value that is 1 more, or 1 less, than the correct value. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Off-by-one error in the xlog function of mountd in the Linux NFS utils package (nfs-utils) before 1.0.4 allows remote attackers to cause a denial of service and possibly execute arbitrary code via certain RPC requests to mountd that do not contain newlines.

The weakness was published 08/18/2003 by Janusz Niewiadomski as confirmed advisory (CERT.org). It is possible to read the advisory at kb.cert.org. The identification of this vulnerability is CVE-2003-0252 since 05/06/2003. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/21/2025).

The vulnerability scanner Nessus provides a plugin with the ID 14059 (Mandrake Linux Security Advisory : nfs-utils (MDKSA-2003:076)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Mandriva Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 68521 (NFS-Utils Xlog Remote Buffer Overrun Vulnerability).

Upgrading to version 1.0.4 eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability. Attack attempts may be identified with Snort ID 2185. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 2263.

The vulnerability is also documented in the databases at X-Force (12600), Tenable (14059), SecurityFocus (BID 8179†), Secunia (SA9259†) and SecurityTracker (ID 1007187†). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 10.0
VulDB Meta Temp Score: 9.5

VulDB Base Score: 10.0
VulDB Temp Score: 9.5
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: Off-by-one
CWE: CWE-193 / CWE-189
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 14059
Nessus Name: Mandrake Linux Security Advisory : nfs-utils (MDKSA-2003:076)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 53638
OpenVAS Name: Debian Security Advisory DSA 349-1 (nfs-utils)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: nfs-utils 1.0.4

Snort ID: 2185
Snort Message: PROTOCOL-RPC mountd UDP mount path overflow attempt
Snort Class: 🔍

Suricata ID: 2102184
Suricata Class: 🔍
Suricata Message: 🔍

TippingPoint: 🔍

McAfee IPS: 🔍
McAfee IPS Version: 🔍

SourceFire IPS: 🔍

Timelineinfo

05/06/2003 🔍
07/14/2003 +69 days 🔍
07/14/2003 +0 days 🔍
07/14/2003 +0 days 🔍
07/21/2003 +7 days 🔍
08/18/2003 +28 days 🔍
08/18/2003 +0 days 🔍
08/18/2003 +0 days 🔍
08/20/2003 +2 days 🔍
07/31/2004 +346 days 🔍
08/14/2014 +3666 days 🔍
08/21/2025 +4025 days 🔍

Sourcesinfo

Advisory: kb.cert.org
Researcher: Janusz Niewiadomski
Status: Confirmed

CVE: CVE-2003-0252 (🔍)
GCVE (CVE): GCVE-0-2003-0252
GCVE (VulDB): GCVE-100-20675

OVAL: 🔍

CERT: 🔍
X-Force: 12600
SecurityFocus: 8179 - NFS-Utils Xlog Remote Buffer Overrun Vulnerability
Secunia: 9259 - nfs-utils "xlog()" Buffer Overflow Vulnerability, Moderately Critical
SecurityTracker: 1007187
Vulnerability Center: 1747 - DoS in NFS-Utils RPC.mountd Xlog() Function via RPC Requests Without Newlines, High

Entryinfo

Created: 08/14/2014 18:35
Updated: 08/21/2025 13:59
Changes: 08/14/2014 18:35 (82), 05/11/2019 18:27 (11), 12/26/2024 13:13 (16), 08/21/2025 13:59 (2)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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