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[USN-2048-2] curl regression

Posted on 06 December 2013
Ubuntu Security

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Ubuntu Security Notice USN-2048-2
December 06, 2013

curl regression
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 12.10
- Ubuntu 12.04 LTS
- Ubuntu 10.04 LTS

Summary:

USN-2048-1 introduced a regression in curl.

Software Description:
- curl: HTTP, HTTPS, and FTP client and client libraries

Details:

USN-2048-1 fixed a vulnerability in curl. The security fix uncovered a bu=
g
in the curl command line tool which resulted in the --insecure (-k) optio=
n
not working as intended. This update fixes the problem.

We apologize for the inconvenience.

Original advisory details:

Scott Cantor discovered that libcurl incorrectly verified CN and SAN nam=
e
fields when digital signature verification was disabled. When libcurl is=

being used in this uncommon way by specific applications, an attacker co=
uld
exploit this to perform a man in the middle attack to view sensitive
information or alter encrypted communications.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 12.10:
libcurl3 7.27.0-1ubuntu1.6

Ubuntu 12.04 LTS:
libcurl3 7.22.0-3ubuntu4.5

Ubuntu 10.04 LTS:
libcurl3 7.19.7-1ubuntu1.5

In general, a standard system update will make all the necessary changes.=


References:
http://www.ubuntu.com/usn/usn-2048-2
http://www.ubuntu.com/usn/usn-2048-1
https://launchpad.net/bugs/1258366

Package Information:
https://launchpad.net/ubuntu/+source/curl/7.27.0-1ubuntu1.6
https://launchpad.net/ubuntu/+source/curl/7.22.0-3ubuntu4.5
https://launchpad.net/ubuntu/+source/curl/7.19.7-1ubuntu1.5

 

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