Debian Security Advisory

DLA-1568-1 curl -- LTS security update

Date Reported:
06 Nov 2018
Affected Packages:
Security database references:
In the Debian bugtracking system: Bug 848958, Bug 837945, Bug 836918.
In Mitre's CVE dictionary: CVE-2016-7141, CVE-2016-7167, CVE-2016-9586, CVE-2018-16839, CVE-2018-16842.
More information:

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

  • CVE-2016-7141

    When built with NSS and the 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: