Moderate CentOS curl Security Update


curl-7.19.7-46.el6.i686.rpm, curl-7.19.7-46.el6.src.rpm, curl-7.19.7-46.el6.x86_64.rpm, libcurl-7.19.7-46.el6.i686.rpm, libcurl-7.19.7-46.el6.x86_64.rpm, libcurl-devel-7.19.7-46.el6.i686.rpm, libcurl-devel-7.19.7-46.el6.x86_64.rpm,
2018-01-18 11:10
2017-07-27 19:09
2017-04-01 19:09
2017-01-05 20:13


Updated curl packages that fix multiple security issues, several bugs, and
add two enhancements are now available for Red Hat Enterprise Linux 6.

Red Hat Product Security has rated this update as having Moderate security
impact. Common Vulnerability Scoring System (CVSS) base scores, which give
detailed severity ratings, are available for each vulnerability from the
CVE links in the References section.

The curl packages provide the libcurl library and the curl utility for
downloading files from servers using various protocols, including HTTP,
FTP, and LDAP.

It was found that the libcurl library did not correctly handle partial
literal IP addresses when parsing received HTTP cookies. An attacker able
to trick a user into connecting to a malicious server could use this flaw
to set the user's cookie to a crafted domain, making other cookie-related
issues easier to exploit. (CVE-2014-3613)

A flaw was found in the way the libcurl library performed the duplication
of connection handles. If an application set the CURLOPT_COPYPOSTFIELDS
option for a handle, using the handle's duplicate could cause the
application to crash or disclose a portion of its memory. (CVE-2014-3707)

It was discovered that the libcurl library failed to properly handle URLs
with embedded end-of-line characters. An attacker able to make an
application using libcurl to access a specially crafted URL via an HTTP
proxy could use this flaw to inject additional headers to the request or
construct additional requests. (CVE-2014-8150)

It was discovered that libcurl implemented aspects of the NTLM and
Negotatiate authentication incorrectly. If an application uses libcurl
and the affected mechanisms in a specifc way, certain requests to a
previously NTLM-authenticated server could appears as sent by the wrong
authenticated user. Additionally, the initial set of credentials for HTTP
Negotiate-authenticated requests could be reused in subsequent requests,
although a different set of credentials was specified. (CVE-2015-3143,

Red Hat would like to thank the cURL project for reporting these issues.

Bug fixes:

* An out-of-protocol fallback to SSL version 3.0 (SSLv3.0) was available
with libcurl. Attackers could abuse the fallback to force downgrade of the
SSL version. The fallback has been removed from libcurl. Users requiring
this functionality can explicitly enable SSLv3.0 through the libcurl API.

* A single upload transfer through the FILE protocol opened the destination
file twice. If the inotify kernel subsystem monitored the file, two events
were produced unnecessarily. The file is now opened only once per upload.

* Utilities using libcurl for SCP/SFTP transfers could terminate
unexpectedly when the system was running in FIPS mode. (BZ#1008178)

* Using the "--retry" option with the curl utility could cause curl to
terminate unexpectedly with a segmentation fault. Now, adding "--retry" no
longer causes curl to crash. (BZ#1009455)

* The "curl --trace-time" command did not use the correct local time when
printing timestamps. Now, "curl --trace-time" works as expected.

* The valgrind utility could report dynamically allocated memory leaks on
curl exit. Now, curl performs a global shutdown of the NetScape Portable
Runtime (NSPR) library on exit, and valgrind no longer reports the memory
leaks. (BZ#1146528)

* Previously, libcurl returned an incorrect value of the
CURLINFO_HEADER_SIZE field when a proxy server appended its own headers to
the HTTP response. Now, the returned value is valid. (BZ#1161163)


* The "--tlsv1.0", "--tlsv1.1", and "--tlsv1.2" options are available for
specifying the minor version of the TLS protocol to be negotiated by NSS.
The "--tlsv1" option now negotiates the highest version of the TLS protocol
supported by both the client and the server. (BZ#1012136)

* It is now possible to explicitly enable or disable the ECC and the new
AES cipher suites to be used for TLS. (BZ#1058767, BZ#1156422)

All curl users are advised to upgrade to these updated packages, which
contain backported patches to correct these issues and add these
Please see

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Affected package information

Release Package Patched in
6 curl curl-7.19.7-46.el6.i686.rpm
curl curl-7.19.7-46.el6.src.rpm
curl curl-7.19.7-46.el6.x86_64.rpm
libcurl libcurl-7.19.7-46.el6.i686.rpm
libcurl libcurl-7.19.7-46.el6.x86_64.rpm
libcurl-devel libcurl-devel-7.19.7-46.el6.i686.rpm
libcurl-devel libcurl-devel-7.19.7-46.el6.x86_64.rpm