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Ubuntu Security Notice USN-3441-1
October 10, 2017

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

– Ubuntu 17.04
– Ubuntu 16.04 LTS
– Ubuntu 14.04 LTS

Summary:

Several security issues were fixed in curl.

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

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. This issue only affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS.
(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 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 17.04:
curl 7.52.1-4ubuntu1.2
libcurl3 7.52.1-4ubuntu1.2
libcurl3-gnutls 7.52.1-4ubuntu1.2
libcurl3-nss 7.52.1-4ubuntu1.2

Ubuntu 16.04 LTS:
curl 7.47.0-1ubuntu2.3
libcurl3 7.47.0-1ubuntu2.3
libcurl3-gnutls 7.47.0-1ubuntu2.3
libcurl3-nss 7.47.0-1ubuntu2.3

Ubuntu 14.04 LTS:
curl 7.35.0-1ubuntu2.11
libcurl3 7.35.0-1ubuntu2.11
libcurl3-gnutls 7.35.0-1ubuntu2.11
libcurl3-nss 7.35.0-1ubuntu2.11

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

References:
https://www.ubuntu.com/usn/usn-3441-1
CVE-2016-9586, CVE-2017-1000100, CVE-2017-1000101, CVE-2017-1000254,
CVE-2017-7407

Package Information:
https://launchpad.net/ubuntu/+source/curl/7.52.1-4ubuntu1.2
https://launchpad.net/ubuntu/+source/curl/7.47.0-1ubuntu2.3
https://launchpad.net/ubuntu/+source/curl/7.35.0-1ubuntu2.11

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