Linux Kernel up to 2.4.30 nfs2xdr.c symlink

CVSS Meta Temp Score
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CTI Interest Score
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5.1$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel. It has been declared as critical. Affected is an unknown function of the file nfs2xdr.c. The manipulation results in symlink. This vulnerability is cataloged as CVE-2005-4798. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel (Operating System). It has been classified as critical. Affected is some unknown processing of the file nfs2xdr.c. The manipulation with an unknown input leads to a symlink vulnerability. CWE is classifying the issue as CWE-61. The product, when opening a file or directory, does not sufficiently account for when the file is a symbolic link that resolves to a target outside of the intended control sphere. This could allow an attacker to cause the product to operate on unauthorized files. This is going to have an impact on availability. CVE summarizes:

Buffer overflow in NFS readlink handling in the Linux Kernel 2.4 up to 2.4.31 allows remote NFS servers to cause a denial of service (crash) via a long symlink, which is not properly handled in (1) nfs2xdr.c or (2) nfs3xdr.c and causes a crash in the NFS client.

The bug was discovered 09/12/2005. The weakness was shared 12/31/2005 (Website). The advisory is shared for download at kernel.org. This vulnerability is traded as CVE-2005-4798 since 05/09/2006. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 110 days. During that time the estimated underground price was around $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 22725 (Debian DSA-1183-1 : kernel-source-2.4.27 - 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 and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 117738 (CentOS Security Update for Kernel (CESA-2006:0144)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 10 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (40729), Tenable (22725), SecurityFocus (BID 20186†), OSVDB (27781†) and Secunia (SA20398†). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

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

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

NVD Base Score: 🔍

Exploitinginfo

Class: Symlink
CWE: CWE-61 / CWE-59
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: 22725
Nessus Name: Debian DSA-1183-1 : kernel-source-2.4.27 - several vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 57407
OpenVAS Name: Debian Security Advisory DSA 1183-1 (kernel-source-2.4.27)
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: 🔍
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Timelineinfo

09/12/2005 🔍
09/12/2005 +0 days 🔍
12/31/2005 +110 days 🔍
12/31/2005 +0 days 🔍
12/31/2005 +0 days 🔍
05/09/2006 +129 days 🔍
06/01/2006 +23 days 🔍
09/25/2006 +116 days 🔍
10/14/2006 +19 days 🔍
09/11/2007 +332 days 🔍
03/12/2015 +2739 days 🔍
07/25/2019 +1596 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: kernel.org
Status: Not defined
Confirmation: 🔍

CVE: CVE-2005-4798 (🔍)
GCVE (CVE): GCVE-0-2005-4798
GCVE (VulDB): GCVE-100-28104

OVAL: 🔍

X-Force: 40729
SecurityFocus: 20186 - Linux Kernel NFS ReadLink Remote Denial of Service Vulnerability
Secunia: 20398
OSVDB: 27781 - CVE-2005-4798 - Linux - Buffer Overflow Issue
Vulnerability Center: 16025 - Linux Kernel NFS ReadLink Vulnerability Allows Remote DoS, High

Entryinfo

Created: 03/12/2015 11:11
Updated: 07/25/2019 16:28
Changes: 03/12/2015 11:11 (79), 07/25/2019 16:28 (5)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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