CVE-2011-4087

Published: 29 October 2011

The br_parse_ip_options function in net/bridge/br_netfilter.c in the Linux kernel before 2.6.39 does not properly initialize a certain data structure, which allows remote attackers to cause a denial of service by leveraging connectivity to a network interface that uses an Ethernet bridge device.

From the Ubuntu Security Team

Scot Doyle discovered that the bridge networking interface incorrectly handled certain network packets. A remote attacker could exploit this to crash the system, leading to a denial of service.

Notes

Author	Note
tyhicks	Introduced by 462fb2af, 2.6.37
apw	the fix below is actually a simple optimisation and not required: break-fix: 462fb2af9788a82a534f8184abfde31574e1cfa0 10949550bd1e50cc91c0f5085f7080a44b0871fe

Priority

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package	Release	Status
linux Launchpad, Ubuntu, Debian	hardy	Not vulnerable
	lucid	Not vulnerable
	maverick	Not vulnerable
	natty	Released (2.6.38-11.47)
	oneiric	Not vulnerable (2.6.39-0.5)
	precise	Not vulnerable (3.1.0-1.1)
	quantal	Not vulnerable (3.1.0-1.1)
	upstream	Released (2.6.39~rc5)
	Patches: Introduced by 462fb2af9788a82a534f8184abfde31574e1cfa0 Fixed by f8e9881c2aef1e982e5abc25c046820cd0b7cf64 Introduced by 462fb2af9788a82a534f8184abfde31574e1cfa0 Fixed by 66944e1c5797562cebe2d1857d46dff60bf9a69e Introduced by 462fb2af9788a82a534f8184abfde31574e1cfa0 Fixed by c65353daf137dd41f3ede3baf62d561fca076228
linux-armadaxp Launchpad, Ubuntu, Debian	hardy	Does not exist
	lucid	Does not exist
	natty	Does not exist
	oneiric	Does not exist
	precise	Not vulnerable (3.2.0-1600.1)
	quantal	Not vulnerable (3.2.0-1602.5)
	upstream	Released (2.6.39~rc5)
linux-ec2 Launchpad, Ubuntu, Debian	hardy	Does not exist
	lucid	Not vulnerable
	maverick	Ignored (end of life)
	natty	Does not exist
	oneiric	Does not exist
	precise	Does not exist
	quantal	Does not exist
	upstream	Released (2.6.39~rc5)
linux-fsl-imx51 Launchpad, Ubuntu, Debian	hardy	Does not exist
	lucid	Not vulnerable
	maverick	Does not exist
	natty	Does not exist
	oneiric	Does not exist
	precise	Does not exist
	quantal	Does not exist
	upstream	Released (2.6.39~rc5)
linux-lts-backport-maverick Launchpad, Ubuntu, Debian	hardy	Does not exist
	lucid	Not vulnerable
	maverick	Does not exist
	natty	Does not exist
	oneiric	Does not exist
	precise	Does not exist
	quantal	Does not exist
	upstream	Released (2.6.39~rc5)
linux-lts-backport-natty Launchpad, Ubuntu, Debian	hardy	Does not exist
	lucid	Released (2.6.38-11.49~lucid1)
	maverick	Does not exist
	natty	Does not exist
	oneiric	Does not exist
	precise	Does not exist
	quantal	Does not exist
	upstream	Released (2.6.39~rc5)
linux-lts-backport-oneiric Launchpad, Ubuntu, Debian	hardy	Does not exist
	lucid	Released (3.0.0-5.6~lucid1)
	maverick	Does not exist
	natty	Does not exist
	oneiric	Does not exist
	precise	Does not exist
	quantal	Does not exist
	upstream	Released (2.6.39~rc5)
linux-mvl-dove Launchpad, Ubuntu, Debian	hardy	Does not exist
	lucid	Not vulnerable
	maverick	Not vulnerable
	natty	Does not exist
	oneiric	Does not exist
	precise	Does not exist
	quantal	Does not exist
	upstream	Released (2.6.39~rc5)
linux-ti-omap4 Launchpad, Ubuntu, Debian	hardy	Does not exist
	lucid	Does not exist
	maverick	Not vulnerable
	natty	Released (2.6.38-1209.18)
	oneiric	Not vulnerable (3.0.0-1200.1)
	precise	Not vulnerable (3.0.0-1401.2)
	quantal	Not vulnerable
	upstream	Released (2.6.39~rc5)

Severity score breakdown

Parameter	Value
Base score	7.5
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

Bugs

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