Symeon Paraschoudis discovered that the curl_easy_duphandle() function in cURL, an URL transfer library, has a bug that can lead to libcurl eventually sending off sensitive data that was not intended for sending, while performing a HTTP POST operation.

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Debian Security Advisory DSA-3069-1                   This email address is being protected from spambots. You need JavaScript enabled to view it.
http://www.debian.org/security/                      Salvatore Bonaccorso
November 07, 2014                      http://www.debian.org/security/faq
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Package        : curl
CVE ID         : CVE-2014-3707

Symeon Paraschoudis discovered that the curl_easy_duphandle() function
in cURL, an URL transfer library, has a bug that can lead to libcurl
eventually sending off sensitive data that was not intended for sending,
while performing a HTTP POST operation.

This bug requires CURLOPT_COPYPOSTFIELDS and curl_easy_duphandle() to be
used in that order, and then the duplicate handle must be used to
perform the HTTP POST. The curl command line tool is not affected by
this problem as it does not use this sequence.

For the stable distribution (wheezy), this problem has been fixed in
version 7.26.0-1+wheezy11.

For the upcoming stable distribution (jessie), this problem will be
fixed in version 7.38.0-3.

For the unstable distribution (sid), this problem has been fixed in
version 7.38.0-3.

We recommend that you upgrade your curl packages.

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

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