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Ubuntu 12.10, 12.04 LTS USN-2048-2 Critical Curl Regression

ubuntu
Calendar Grey December 6, 2013
Scroller Ubuntu
A new update for multiple LTS versions of Ubuntu has been issued to rectify a regression in the curl utility, enhancing security against man-in-the-middle attacks
USN-2048-1 introduced a regression in curl.

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 bug

in the curl command line tool which resulted in the --insecure (-k) option

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 name

fields when digital signature verification was disabled. When libcurl is

being used in this uncommon way by specific applications, an attacker could

exploit this to perform a man in the middle attack to view sensitive

information or alter encrypted communications.

Topics%20covered

Topics Covered

security advisory critical ubuntu man in the middle curl regression

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

https://ubuntu.com/security/notices/USN-2048-2

https://ubuntu.com/security/notices/USN-2048-1

https://bugs.launchpad.net/ubuntu/+source/curl/+bug/1258366

Severity
critical
Lowest
Low
Medium
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Critical

December 06, 2013

Topics%20covered

Topics Covered

security advisory critical ubuntu man in the middle curl regression

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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