Input validation error in Linux kernel - CVE-2013-2140

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Main Vulnerability Database Vulnerabilities #VU42532

Input validation error in Linux kernel - CVE-2013-2140

Published: September 25, 2013 / Updated: August 10, 2020


Vulnerability identifier: #VU42532
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2013-2140
CWE-ID: CWE-20
Exploitation vector: Adjecent network
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote #AU# to manipulate or delete data.

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.


Affected software

Linux kernel
Ubuntu
linux (Ubuntu package)
linux-lts-quantal (Ubuntu package)
linux-lts-raring (Ubuntu package)
linux-image-3.8.0-30-generic (Ubuntu package)

How to mitigate CVE-2013-2140

Install update from vendor's website.

linux (Ubuntu package) - addressed in versions 3.2.0-57.87, 3.5.0-40.62
linux-lts-quantal (Ubuntu package) - update to 3.5.0-40.62~precise1
linux-lts-raring (Ubuntu package) - update to 3.8.0-30.44~precise1
linux-image-3.8.0-30-generic (Ubuntu package) - update to 3.8.0-30.44

External References

Related Security Bulletins