CVE-2011-1927

Publication date 18 May 2011

Last updated 24 July 2024

Ubuntu priority

High

Why this priority?

The ip_expire function in net/ipv4/ip_fragment.c in the Linux kernel before 2.6.39 does not properly construct ICMP_TIME_EXCEEDED packets after a timeout, which allows remote attackers to cause a denial of service (invalid pointer dereference) via crafted fragmented packets.

From the Ubuntu Security Team

Aristide Fattori and Roberto Paleari reported a flaw in the Linux kernel’s handling of IPv4 icmp packets. A remote user could exploit this to cause a denial of service.

Read the notes from the security team

Status

No maintained releases are affected by this CVE.

Package Ubuntu Release Status
linux 11.10 oneiric
Fixed 2.6.39-3.9
11.04 natty
Fixed 2.6.38-10.44
10.10 maverick
Fixed 2.6.35-32.66
10.04 LTS lucid
Not affected
8.04 LTS hardy
Not affected
linux-ec2 11.10 oneiric Not in release
11.04 natty Not in release
10.10 maverick Ignored end of life
10.04 LTS lucid
Not affected
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
Not affected
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 2.6.35-32.66~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 2.6.38-10.44~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
Fixed 3.0.0-5.6~lucid1
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
Not affected
10.04 LTS lucid
Not affected
8.04 LTS hardy Not in release
linux-ti-omap4 11.10 oneiric
Fixed 3.0.0-1200.1
11.04 natty
Fixed 2.6.38-1209.22
10.10 maverick
Fixed 2.6.35-903.31
10.04 LTS lucid Not in release
8.04 LTS hardy Not in release

Notes

jdstrand

2.6.38 only?

apw

this report and the fix overlapped with each other commit below was identified as the fix: 64f3b9e203bd06855072e295557dca1485a2ecba

Patch details

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

Package Patch details
linux

References

Related Ubuntu Security Notices (USN)

    • USN-1379-1
    • Linux kernel vulnerabilities
    • 28 February 2012
    • USN-1387-1
    • Linux kernel (Maverick backport) vulnerabilities
    • 6 March 2012
    • USN-1383-1
    • Linux kernel (OMAP4) vulnerabilities
    • 6 March 2012
    • USN-1167-1
    • Linux kernel vulnerabilities
    • 13 July 2011
    • USN-1394-1
    • linux-ti-omap4 vulnerabilities
    • 7 March 2012

Other references