Sigurnosni nedostaci programskog paketa curl

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Red Hat Security Advisory

Synopsis: Moderate: curl security, bug fix, and enhancement update
Advisory ID: RHSA-2015:2159-06
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2015-2159.html
Issue date: 2015-11-19
CVE Names: CVE-2014-3613 CVE-2014-3707 CVE-2014-8150
CVE-2015-3143 CVE-2015-3148
=====================================================================

1. Summary:

Updated curl packages that fix multiple security issues, several bugs, and
add two enhancements are now available for Red Hat Enterprise Linux 7.

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.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Client (v. 7) – x86_64
Red Hat Enterprise Linux Client Optional (v. 7) – x86_64
Red Hat Enterprise Linux ComputeNode (v. 7) – x86_64
Red Hat Enterprise Linux ComputeNode Optional (v. 7) – x86_64
Red Hat Enterprise Linux Server (v. 7) – aarch64, ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Workstation (v. 7) – x86_64

3. Description:

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 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,
CVE-2015-3148)

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

Bug fixes:

* An out-of-protocol fallback to SSL 3.0 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 SSL 3.0 through the libcurl API.
(BZ#1154060)

* TLS 1.1 and TLS 1.2 are no longer disabled by default in libcurl. You can
explicitly disable them through the libcurl API. (BZ#1170339)

* FTP operations such as downloading files took a significantly long time
to complete. Now, the FTP implementation in libcurl correctly sets blocking
direction and estimated timeout for connections, resulting in faster FTP
transfers. (BZ#1218272)

Enhancements:

* With the updated packages, it is possible to explicitly enable or disable
new Advanced Encryption Standard (AES) cipher suites to be used for the TLS
protocol. (BZ#1066065)

* The libcurl library did not implement a non-blocking SSL handshake, which
negatively affected performance of applications based on the libcurl multi
API. The non-blocking SSL handshake has been implemented in libcurl, and
the libcurl multi API now immediately returns the control back to the
application whenever it cannot read or write data from or to the underlying
network socket. (BZ#1091429)

* The libcurl library used an unnecessarily long blocking delay for actions
with no active file descriptors, even for short operations. Some actions,
such as resolving a host name using /etc/hosts, took a long time to
complete. The blocking code in libcurl has been modified so that the
initial delay is short and gradually increases until an event occurs.
(BZ#1130239)

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

4. Solution:

Before applying this update, make sure all previously released errata
relevant to your system have been applied.

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258

5. Bugs fixed (https://bugzilla.redhat.com/):

1130239 – Difference in curl performance between RHEL6 and RHEL7
1136154 – CVE-2014-3613 curl: incorrect handling of IP addresses in cookie domain
1154060 – curl: Disable out-of-protocol fallback to SSL 3.0
1154941 – CVE-2014-3707 curl: incorrect handle duplication after COPYPOSTFIELDS
1161182 – Response headers added by proxy servers missing in CURLINFO_HEADER_SIZE
1166264 – NTLM: ignore CURLOPT_FORBID_REUSE during NTLM HTTP auth [RHEL-7]
1170339 – use the default min/max TLS version provided by NSS
1178692 – CVE-2014-8150 curl: URL request injection vulnerability in parseurlandfillconn()
1213306 – CVE-2015-3143 curl: re-using authenticated connection when unauthenticated
1213351 – CVE-2015-3148 curl: Negotiate not treated as connection-oriented
1218272 – Performance problem with libcurl and FTP on RHEL7.X

6. Package List:

Red Hat Enterprise Linux Client (v. 7):

Source:
curl-7.29.0-25.el7.src.rpm

x86_64:
curl-7.29.0-25.el7.x86_64.rpm
curl-debuginfo-7.29.0-25.el7.i686.rpm
curl-debuginfo-7.29.0-25.el7.x86_64.rpm
libcurl-7.29.0-25.el7.i686.rpm
libcurl-7.29.0-25.el7.x86_64.rpm

Red Hat Enterprise Linux Client Optional (v. 7):

x86_64:
curl-debuginfo-7.29.0-25.el7.i686.rpm
curl-debuginfo-7.29.0-25.el7.x86_64.rpm
libcurl-devel-7.29.0-25.el7.i686.rpm
libcurl-devel-7.29.0-25.el7.x86_64.rpm

Red Hat Enterprise Linux ComputeNode (v. 7):

Source:
curl-7.29.0-25.el7.src.rpm

x86_64:
curl-7.29.0-25.el7.x86_64.rpm
curl-debuginfo-7.29.0-25.el7.i686.rpm
curl-debuginfo-7.29.0-25.el7.x86_64.rpm
libcurl-7.29.0-25.el7.i686.rpm
libcurl-7.29.0-25.el7.x86_64.rpm

Red Hat Enterprise Linux ComputeNode Optional (v. 7):

x86_64:
curl-debuginfo-7.29.0-25.el7.i686.rpm
curl-debuginfo-7.29.0-25.el7.x86_64.rpm
libcurl-devel-7.29.0-25.el7.i686.rpm
libcurl-devel-7.29.0-25.el7.x86_64.rpm

Red Hat Enterprise Linux Server (v. 7):

Source:
curl-7.29.0-25.el7.src.rpm

aarch64:
curl-7.29.0-25.el7.aarch64.rpm
curl-debuginfo-7.29.0-25.el7.aarch64.rpm
libcurl-7.29.0-25.el7.aarch64.rpm
libcurl-devel-7.29.0-25.el7.aarch64.rpm

ppc64:
curl-7.29.0-25.el7.ppc64.rpm
curl-debuginfo-7.29.0-25.el7.ppc.rpm
curl-debuginfo-7.29.0-25.el7.ppc64.rpm
libcurl-7.29.0-25.el7.ppc.rpm
libcurl-7.29.0-25.el7.ppc64.rpm
libcurl-devel-7.29.0-25.el7.ppc.rpm
libcurl-devel-7.29.0-25.el7.ppc64.rpm

ppc64le:
curl-7.29.0-25.el7.ppc64le.rpm
curl-debuginfo-7.29.0-25.el7.ppc64le.rpm
libcurl-7.29.0-25.el7.ppc64le.rpm
libcurl-devel-7.29.0-25.el7.ppc64le.rpm

s390x:
curl-7.29.0-25.el7.s390x.rpm
curl-debuginfo-7.29.0-25.el7.s390.rpm
curl-debuginfo-7.29.0-25.el7.s390x.rpm
libcurl-7.29.0-25.el7.s390.rpm
libcurl-7.29.0-25.el7.s390x.rpm
libcurl-devel-7.29.0-25.el7.s390.rpm
libcurl-devel-7.29.0-25.el7.s390x.rpm

x86_64:
curl-7.29.0-25.el7.x86_64.rpm
curl-debuginfo-7.29.0-25.el7.i686.rpm
curl-debuginfo-7.29.0-25.el7.x86_64.rpm
libcurl-7.29.0-25.el7.i686.rpm
libcurl-7.29.0-25.el7.x86_64.rpm
libcurl-devel-7.29.0-25.el7.i686.rpm
libcurl-devel-7.29.0-25.el7.x86_64.rpm

Red Hat Enterprise Linux Workstation (v. 7):

Source:
curl-7.29.0-25.el7.src.rpm

These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/

7. References:

https://access.redhat.com/security/cve/CVE-2014-3613
https://access.redhat.com/security/cve/CVE-2014-3707
https://access.redhat.com/security/cve/CVE-2014-8150
https://access.redhat.com/security/cve/CVE-2015-3143
https://access.redhat.com/security/cve/CVE-2015-3148
https://access.redhat.com/security/updates/classification/#moderate

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

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