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CVE-2011-3191

Publication date 25 August 2011

Last updated 24 July 2024

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

8.8 · High

Score breakdown

Integer signedness error in the CIFSFindNext function in fs/cifs/cifssmb.c in the Linux kernel before 3.1 allows remote CIFS servers to cause a denial of service (memory corruption) or possibly have unspecified other impact via a large length value in a response to a read request for a directory.

From the Ubuntu Security Team

Darren Lavender discovered that the CIFS client incorrectly handled certain large values. A remote attacker with a malicious server could exploit this to crash the system or possibly execute arbitrary code as the root user.

Read the notes from the security team

Status

Package Ubuntu Release Status
linux 11.10 oneiric
Not affected
11.04 natty
Fixed 2.6.38-12.51
10.10 maverick
Fixed 2.6.35-30.60
10.04 LTS lucid
Fixed 2.6.32-35.78
8.04 LTS hardy
Fixed 2.6.24-29.94
linux-ec2 11.10 oneiric Not in release
11.04 natty Not in release
10.10 maverick Ignored
10.04 LTS lucid
Fixed 2.6.32-319.39
8.04 LTS hardy Not in release
linux-fsl-imx51 11.10 oneiric Not in release
11.04 natty Not in release
10.10 maverick Not in release
10.04 LTS lucid
Fixed 2.6.31-611.29
8.04 LTS hardy Not in release
linux-lts-backport-maverick 11.10 oneiric Not in release
11.04 natty Not in release
10.10 maverick Not in release
10.04 LTS lucid
Fixed 2.6.35-30.60~lucid1
8.04 LTS hardy Not in release
linux-lts-backport-natty 11.10 oneiric Not in release
11.04 natty Not in release
10.10 maverick Not in release
10.04 LTS lucid
Fixed 2.6.38-12.51~lucid1
8.04 LTS hardy Not in release
linux-lts-backport-oneiric 11.10 oneiric Not in release
11.04 natty Not in release
10.10 maverick Not in release
10.04 LTS lucid
Not affected
8.04 LTS hardy Not in release
linux-mvl-dove 11.10 oneiric Not in release
11.04 natty Not in release
10.10 maverick
Fixed 2.6.32-419.37
10.04 LTS lucid
Fixed 2.6.32-219.37
8.04 LTS hardy Not in release
linux-ti-omap4 11.10 oneiric
Not affected
11.04 natty
Fixed 2.6.38-1209.16
10.10 maverick
Fixed 2.6.35-903.25
10.04 LTS lucid Not in release
8.04 LTS hardy Not in release

Notes

apw

patch title is as below in CIFS tree, likely SHA1 added below: cifs: fix possible memory corruption in CIFSFindNext

kees

actual sha is below, old one from CIFS tree was c32dfffaf59f73bbcf4472141b851a4dc5db2bf0

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
linux

Severity score breakdown

Parameter Value
Base score 8.8 · High
Attack vector Adjacent
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)

    • USN-1241-1
    • Linux kernel (i.MX51) vulnerabilities
    • 25 October 2011
    • USN-1219-1
    • Linux kernel (Maverick backport) vulnerabilities
    • 29 September 2011
    • USN-1253-1
    • Linux kernel vulnerabilities
    • 8 November 2011
    • USN-1228-1
    • Linux kernel (OMAP4) vulnerabilities
    • 12 October 2011
    • USN-1246-1
    • Linux kernel vulnerabilities
    • 25 October 2011
    • USN-1239-1
    • Linux kernel (EC2) vulnerabilities
    • 25 October 2011
    • USN-1220-1
    • Linux kernel (OMAP4) vulnerabilities
    • 29 September 2011
    • USN-1240-1
    • Linux kernel (Marvell DOVE) vulnerabilities
    • 25 October 2011
    • USN-1227-1
    • Linux kernel vulnerabilities
    • 11 October 2011
    • USN-1256-1
    • Linux kernel (Natty backport) vulnerabilities
    • 9 November 2011
    • USN-1245-1
    • Linux kernel (Marvell DOVE) vulnerabilities
    • 25 October 2011
    • USN-1225-1
    • Linux kernel vulnerabilities
    • 4 October 2011

Other references