[SECURITY] [DLA 1568-1] curl security update

Package : curl
Version : 7.38.0-4+deb8u13
CVE ID : CVE-2016-7141 CVE-2016-7167 CVE-2016-9586
CVE-2018-16839 CVE-2018-16842
Debian Bug : 848958 837945 836918

Several vulnerabilities were discovered in cURL, an URL transfer
library.

CVE-2016-7141

When built with NSS and the libnsspem.so library is available at
runtime, allows an remote attacker to hijack the authentication of a
TLS connection by leveraging reuse of a previously loaded client
certificate from file for a connection for which no certificate has
been set, a different vulnerability than CVE-2016-5420.

CVE-2016-7167

Multiple integer overflows in the (1) curl_escape, (2)
curl_easy_escape, (3) curl_unescape, and (4) curl_easy_unescape
functions in libcurl allow attackers to have unspecified impact via
a string of length 0xffffffff, which triggers a heap-based buffer
overflow.

CVE-2016-9586

Curl is vulnerable to a buffer overflow when doing a large floating
point output in libcurl's implementation of the printf() functions.
If there are any applications that accept a format string from the
outside without necessary input filtering, it could allow remote
attacks.

CVE-2018-16839

Curl is vulnerable to a buffer overrun in the SASL authentication
code that may lead to denial of service.

CVE-2018-16842

Curl is vulnerable to a heap-based buffer over-read in the
tool_msgs.c:voutf() function that may result in information exposure
and denial of service.

For Debian 8 "Jessie", these problems have been fixed in version
7.38.0-4+deb8u13.

We recommend that you upgrade your curl packages.

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS