CVE-2009-2906 Denial of service in n/a

Medium 4.0 Published 7 Oct 2009 Updated 7 Aug 2024

Remote authenticated users can cause a denial of service in Samba via a crafted oplock break notification reply packet.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2009-2906?

CVE-2009-2906 is a medium-severity denial of service vulnerability in Canonical Ubuntu Linux, published on 7 Oct 2009. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

smbd in Samba 3.0 before 3.0.37, 3.2 before 3.2.15, 3.3 before 3.3.8, and 3.4 before 3.4.2 allows remote authenticated users to cause a denial of service (infinite loop) via an unanticipated oplock break notification reply packet.

Weakness: CWE-835

Which versions are affected by CVE-2009-2906?

It affects 2 products.

Linux distribution packages (20)

`samba` Red Hat:enterprise_linux:3::as	All versions	`0:3.0.9-1.3E.16`
`samba-client` Red Hat:enterprise_linux:3::as	All versions	`0:3.0.9-1.3E.16`
`samba-common` Red Hat:enterprise_linux:3::as	All versions	`0:3.0.9-1.3E.16`
`samba-debuginfo` Red Hat:enterprise_linux:3::as	All versions	`0:3.0.9-1.3E.16`
`samba-swat` Red Hat:enterprise_linux:3::as	All versions	`0:3.0.9-1.3E.16`
`samba` Red Hat:enterprise_linux:3::desktop	All versions	`0:3.0.9-1.3E.16`
`samba-client` Red Hat:enterprise_linux:3::desktop	All versions	`0:3.0.9-1.3E.16`
`samba-common` Red Hat:enterprise_linux:3::desktop	All versions	`0:3.0.9-1.3E.16`
`samba-debuginfo` Red Hat:enterprise_linux:3::desktop	All versions	`0:3.0.9-1.3E.16`
`samba-swat` Red Hat:enterprise_linux:3::desktop	All versions	`0:3.0.9-1.3E.16`
`samba` Red Hat:enterprise_linux:3::es	All versions	`0:3.0.9-1.3E.16`
`samba-client` Red Hat:enterprise_linux:3::es	All versions	`0:3.0.9-1.3E.16`
`samba-common` Red Hat:enterprise_linux:3::es	All versions	`0:3.0.9-1.3E.16`
`samba-debuginfo` Red Hat:enterprise_linux:3::es	All versions	`0:3.0.9-1.3E.16`
`samba-swat` Red Hat:enterprise_linux:3::es	All versions	`0:3.0.9-1.3E.16`
`samba` Red Hat:enterprise_linux:3::ws	All versions	`0:3.0.9-1.3E.16`
`samba-client` Red Hat:enterprise_linux:3::ws	All versions	`0:3.0.9-1.3E.16`
`samba-common` Red Hat:enterprise_linux:3::ws	All versions	`0:3.0.9-1.3E.16`
`samba-debuginfo` Red Hat:enterprise_linux:3::ws	All versions	`0:3.0.9-1.3E.16`
`samba-swat` Red Hat:enterprise_linux:3::ws	All versions	`0:3.0.9-1.3E.16`

Products include Canonical Ubuntu Linux, Samba Samba.

How do I fix CVE-2009-2906?

Upgrade to a fixed version.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2009-2906 being exploited?

There is no known exploitation of CVE-2009-2906 in the wild and no public exploit code.

All Canonical Ubuntu Linux vulnerabilities

Sources

Also known as DEBIAN-CVE-2009-2906, ECHO-279f-73d3-c0f0, GHSA-rqxx-j33q-88vv, RHSA-2009:1528.