[USN-3441-2] curl vulnerabilities

[Leonidas S. Barbosa]

==========================================================================
Ubuntu Security Notice USN-3441-2
October 23, 2017

curl vulnerabilities
==========================================================================

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

- Ubuntu 12.04 ESM

Summary:

Several security issues were fixed in curl.

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

Details:

USN-3441-1 fixed several vulnerabilities in curl. This update
provides the corresponding update for Ubuntu 12.04 ESM.

Original advisory details:

 Daniel Stenberg discovered that curl incorrectly handled large
 floating point output. A remote attacker could use this issue to cause
 curl to crash, resulting in a denial of service, or possibly execute
 arbitrary code. (CVE-2016-9586)

 Even Rouault discovered that curl incorrectly handled large file names
 when doing TFTP transfers. A remote attacker could use this issue to
 cause curl to crash, resulting in a denial of service, or possibly
 obtain sensitive memory contents. (CVE-2017-1000100)

 Brian Carpenter and Yongji Ouyang discovered that curl incorrectly
 handled numerical range globbing. A remote attacker could use this
 issue to cause curl to crash, resulting in a denial of service, or
 possibly obtain sensitive memory contents. (CVE-2017-1000101)

 Max Dymond discovered that curl incorrectly handled FTP PWD responses.
 A remote attacker could use this issue to cause curl to crash,
 resulting in a denial of service. (CVE-2017-1000254)

 Brian Carpenter discovered that curl incorrectly handled IMAP FETCH
 response lines. A remote attacker could use this issue to cause curl
 to crash, resulting in a denial of service, or possibly execute
 arbitrary code.(CVE-2017-1000257)

 Brian Carpenter discovered that curl incorrectly handled the --write-
 out command line option. A local attacker could possibly use this
 issue to obtain sensitive memory contents. (CVE-2017-7407)

Update instructions:

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

Ubuntu 12.04 ESM:
  curl                            7.22.0-3ubuntu4.18
  libcurl3                        7.22.0-3ubuntu4.18
  libcurl3-gnutls                 7.22.0-3ubuntu4.18
  libcurl3-nss                    7.22.0-3ubuntu4.18

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

References:
  https://www.ubuntu.com/usn/usn-3441-2
  https://www.ubuntu.com/usn/usn-3441-1
  CVE-2016-9586, CVE-2017-1000100, CVE-2017-1000254, CVE-2017-1000257,
  CVE-2017-7407
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