USN-726-2: curl regression

Ubuntu Security Notice USN-726-2

4th March, 2009

curl regression

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

  • Ubuntu 8.10

Software description

  • curl

Details

USN-726-1 fixed a vulnerability in curl. Due to an incomplete fix, a regression
was introduced in Ubuntu 8.10 that caused certain types of URLs to fail. This
update fixes the problem. We apologize for the inconvenience.

Original advisory details:

It was discovered that curl did not enforce any restrictions when following
URL redirects. If a user or automated system were tricked into opening a URL to
an untrusted server, an attacker could use redirects to gain access to abitrary
files. This update changes curl behavior to prevent following "file" URLs after
a redirect.

Update instructions

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

Ubuntu 8.10:
libcurl3-gnutls 7.18.2-1ubuntu4.3
libcurl3 7.18.2-1ubuntu4.3

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

In general, a standard system upgrade is sufficient to effect the
necessary changes.

References

LP: 337501