ESB-2018.3476 - [Debian] curl: Multiple vulnerabilities 2018-11-07

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===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2018.3476
                     [DLA 1568-1] curl security update
                              7 November 2018

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           curl
Publisher:         Debian
Operating System:  Debian GNU/Linux 8
Impact/Access:     Execute Arbitrary Code/Commands -- Remote with User Interaction
                   Denial of Service               -- Remote with User Interaction
                   Access Confidential Data        -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-16842 CVE-2018-16839 CVE-2016-9586
                   CVE-2016-7167 CVE-2016-7141 CVE-2016-5420

Reference:         ESB-2018.3443

Original Bulletin: 
   https://lists.debian.org/debian-lts-announce/2018/11/msg00005.html

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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
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