Linux Kernel 3.8 Common Internet File System DFS Referral Name numeric error

CVSS Meta Temp Score
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CTI Interest Score
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6.3$0-$5k0.00

Summaryinfo

A vulnerability described as critical has been identified in Linux Kernel 3.8. This vulnerability affects unknown code of the component Common Internet File System. Such manipulation as part of DFS Referral Name leads to numeric error. This vulnerability is referenced as CVE-2013-4247. No exploit is available. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability was found in Linux Kernel 3.8 (Operating System). It has been rated as critical. Affected by this issue is an unknown code block of the component Common Internet File System. The manipulation as part of a DFS Referral Name leads to a numeric error vulnerability. Using CWE to declare the problem leads to CWE-189. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Off-by-one error in the build_unc_path_to_root function in fs/cifs/connect.c in the Linux kernel before 3.9.6 allows remote attackers to cause a denial of service (memory corruption and system crash) via a DFS share mount operation that triggers use of an unexpected DFS referral name length.

The weakness was published 05/31/2013 by Prasad J Pandit as Linux kernel: cifs: off-by-one bug in build_unc_path_to_root as not defined mailinglist post (oss-sec). The advisory is shared for download at seclists.org. This vulnerability is handled as CVE-2013-4247 since 06/12/2013. The exploitation is known to be difficult. The attack needs to be approached locally. The requirement for exploitation is a simple authentication. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 69419 (Ubuntu 12.04 LTS : linux-lts-raring vulnerabilities (USN-1936-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Ubuntu Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 195986 (Ubuntu Security Notification for Linux Vulnerability (USN-1919-1)).

Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (69419), SecurityFocus (BID 61800†), OSVDB (96319†), Secunia (SA54575†) and Vulnerability Center (SBV-41093†). Similar entries are available at VDB-9545 and VDB-9546. If you want to get best quality of vulnerability data, you may have to visit VulDB.

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.6
VulDB Meta Temp Score: 6.3

VulDB Base Score: 6.6
VulDB Temp Score: 6.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Numeric error
CWE: CWE-189
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 69419
Nessus Name: Ubuntu 12.04 LTS : linux-lts-raring vulnerabilities (USN-1936-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 841535
OpenVAS Name: Ubuntu Update for linux-lts-raring USN-1936-1
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Patch: git.kernel.org

Timelineinfo

05/31/2013 🔍
05/31/2013 +0 days 🔍
06/12/2013 +12 days 🔍
08/14/2013 +63 days 🔍
08/14/2013 +0 days 🔍
08/18/2013 +4 days 🔍
08/20/2013 +2 days 🔍
08/21/2013 +1 days 🔍
08/24/2013 +3 days 🔍
05/21/2021 +2827 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: Linux kernel: cifs: off-by-one bug in build_unc_path_to_root
Researcher: Prasad J Pandit
Status: Not defined
Confirmation: 🔍

CVE: CVE-2013-4247 (🔍)
GCVE (CVE): GCVE-0-2013-4247
GCVE (VulDB): GCVE-100-9980

OVAL: 🔍

SecurityFocus: 61800 - Linux Kernel CVE-2013-4247 Memory Corruption Vulnerability
Secunia: 54575 - Ubuntu update for kernel, Moderately Critical
OSVDB: 96319
Vulnerability Center: 41093 - Linux Kernel 3.8 Until 3.11-rc4 Local Privilege Escalation due to Improper Handling of the pos Variable, Medium

See also: 🔍

Entryinfo

Created: 08/20/2013 13:22
Updated: 05/21/2021 15:32
Changes: 08/20/2013 13:22 (73), 05/09/2017 09:00 (11), 05/21/2021 15:32 (3)
Complete: 🔍
Cache ID: 216:6E8:103

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