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

curl vulnerabilities
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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:

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

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

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

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

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

A Brian Carpenter discovered that curl incorrectly handled the --write-
A out command line option. A local attacker could possibly use this
A 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:
A  curlA A A A A A A A A A A A A A A A A A A A A A A A A A A A 7.22.0-3ubuntu4.18
A  libcurl3A A A A A A A A A A A A A A A A A A A A A A A A 7.22.0-3ubuntu4.18
A  libcurl3-gnutlsA A A A A A A A A A A A A A A A A 7.22.0-3ubuntu4.18
A  libcurl3-nssA A A A A A A A A A A A A A A A A A A A 7.22.0-3ubuntu4.18

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

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