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CVE-2010-5107

Publication date 7 March 2013

Last updated 24 July 2024

Ubuntu priority

Low

Why this priority?

The default configuration of OpenSSH through 6.1 enforces a fixed time limit between establishing a TCP connection and completing a login, which makes it easier for remote attackers to cause a denial of service (connection-slot exhaustion) by periodically making many new TCP connections.

Read the notes from the security team

Status

Package Ubuntu Release Status
openssh 16.04 LTS xenial
Not affected
15.10 wily
Not affected
15.04 vivid
Not affected
14.10 utopic
Not affected
14.04 LTS trusty
Not affected
13.10 saucy
Not affected
13.04 raring
Not affected
12.10 quantal Ignored end of life
12.04 LTS precise Ignored
11.10 oneiric Ignored end of life
10.04 LTS lucid Ignored end of life
8.04 LTS hardy Ignored end of life

Notes

jdstrand

this is a long-standing problem with any server that limits connections. This requires conffile changes.

mdeslaur

Upstream has changed the default MaxStartups to 10:30:100 to mitigate this issue. Sysadmins can change the equivalent config locally. we will not be fixing this issue in Ubuntu 12.04 LTS, in environments where this is a concern, we suggest settings the MaxStartups value to 10:30:100 in the sshd_config file