Linux Kernel blkback.c dispatch_discard_io input validation

CVSS Meta Temp Score
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CTI Interest Score
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5.3$0-$5k0.00

Summaryinfo

A vulnerability labeled as problematic has been found in Linux Kernel. Affected by this issue is the function dispatch_discard_io of the file drivers/block/xen-blkback/blkback.c. The manipulation results in input validation. This vulnerability is cataloged as CVE-2013-2140. There is no exploit available. It is best practice to apply a patch to resolve this issue.

Detailsinfo

A vulnerability classified as problematic has been found in Linux Kernel (Operating System) (the affected version unknown). Affected is the function dispatch_discard_io of the file drivers/block/xen-blkback/blkback.c. The manipulation with an unknown input leads to a input validation vulnerability. CWE is classifying the issue as CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. This is going to have an impact on availability. CVE summarizes:

The dispatch_discard_io function in drivers/block/xen-blkback/blkback.c in the Xen blkback implementation in the Linux kernel before 3.10.5 allows guest OS users to cause a denial of service (data loss) via filesystem write operations on a read-only disk that supports the (1) BLKIF_OP_DISCARD (aka discard or TRIM) or (2) SCSI UNMAP feature.

The weakness was shared 06/05/2013 by Konrad Rzeszutek Wilk as not defined mailinglist post (oss-sec). The advisory is available at seclists.org. The vendor was not involved in the coordination of the public release. This vulnerability is traded as CVE-2013-2140 since 02/19/2013. Local access is required to approach this attack. A authentication is necessary for exploitation. Technical details are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 67284 (Fedora 19 : kernel-3.9.5-301.fc19 (2013-10689)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 195954 (Ubuntu Security Notification for Linux-lts-quantal Vulnerabilities (USN-1947-1)).

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

The vulnerability is also documented in the databases at X-Force (84804), Tenable (67284), SecurityFocus (BID 60243†), OSVDB (94031†) and Secunia (SA53666†). The entries VDB-7176, VDB-7177, VDB-8926 and VDB-10265 are related to this item. 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: 5.5
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
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NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 67284
Nessus Name: Fedora 19 : kernel-3.9.5-301.fc19 (2013-10689)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 865961
OpenVAS Name: Fedora Update for kernel FEDORA-2013-10695
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Patch: seclists.org

Timelineinfo

02/19/2013 🔍
06/05/2013 +106 days 🔍
06/05/2013 +0 days 🔍
06/05/2013 +0 days 🔍
06/11/2013 +6 days 🔍
07/12/2013 +31 days 🔍
09/25/2013 +75 days 🔍
01/08/2014 +105 days 🔍
05/14/2021 +2683 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: seclists.org
Researcher: Konrad Rzeszutek Wilk
Status: Not defined
Confirmation: 🔍

CVE: CVE-2013-2140 (🔍)
GCVE (CVE): GCVE-0-2013-2140
GCVE (VulDB): GCVE-100-9054

OVAL: 🔍

X-Force: 84804
SecurityFocus: 60243
Secunia: 53666 - Linux Kernel "dispatch_discard_io()" RO Disk Manipulation Security Issue, Not Critical
OSVDB: 94031
Vulnerability Center: 42828 - Xen blkback Implementation in Linux Kernel Before 3.10.5 File System Delete Vulnerability on a Read-Only Disk, Low

See also: 🔍

Entryinfo

Created: 06/11/2013 15:39
Updated: 05/14/2021 14:04
Changes: 06/11/2013 15:39 (81), 05/19/2017 10:38 (1), 05/14/2021 14:04 (3)
Complete: 🔍
Committer:
Cache ID: 216:B5A:103

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