Synopsis

Moderate: curl security, bug fix and enhancement update

Type/Severity

Security Advisory: Moderate

Topic

Updated curl packages that fix one security issue, various bugs, and add
enhancements are now available for Red Hat Enterprise Linux 5.

The Red Hat Security Response Team has rated this update as having moderate
security impact. A Common Vulnerability Scoring System (CVSS) base score,
which gives a detailed severity rating, is available from the CVE link in
the References section.

Description

cURL is a tool for getting files from FTP, HTTP, Gopher, Telnet, and DICT
servers, using any of the supported protocols. cURL is designed to work
without user interaction or any kind of interactivity.

Wesley Miaw discovered that when deflate compression was used, libcurl
could call the registered write callback function with data exceeding the
documented limit. A malicious server could use this flaw to crash an
application using libcurl or, potentially, execute arbitrary code. Note:
This issue only affected applications using libcurl that rely on the
documented data size limit, and that copy the data to the insufficiently
sized buffer. (CVE-2010-0734)

This update also fixes the following bugs:

• when using curl to upload a file, if the connection was broken or reset
  by the server during the transfer, curl immediately started using 100% CPU
  and failed to acknowledge that the transfer had failed. With this update,
  curl displays an appropriate error message and exits when an upload fails
  mid-transfer due to a broken or reset connection. (BZ#479967)
  
• libcurl experienced a segmentation fault when attempting to reuse a
  connection after performing GSS-negotiate authentication, which in turn
  caused the curl program to crash. This update fixes this bug so that reused
  connections are able to be successfully established even after
  GSS-negotiate authentication has been performed. (BZ#517199)
  

As well, this update adds the following enhancements:

• curl now supports loading Certificate Revocation Lists (CRLs) from a
  Privacy Enhanced Mail (PEM) file. When curl attempts to access sites that
  have had their certificate revoked in a CRL, curl refuses access to those
  sites. (BZ#532069)
  
• the curl(1) manual page has been updated to clarify that the "--socks4"
  and "--socks5" options do not work with the IPv6, FTPS, or LDAP protocols.
  (BZ#473128)
  
• the curl utility's program help, which is accessed by running "curl -h",
  has been updated with descriptions for the "--ftp-account" and
  "--ftp-alternative-to-user" options. (BZ#517084)
  

Users of curl should upgrade to these updated packages, which contain
backported patches to correct these issues and add these enhancements. All
running applications using libcurl must be restarted for the update to take
effect.

Solution

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

This update is available via the Red Hat Network. Details on how to
use the Red Hat Network to apply this update are available at
http://kbase.redhat.com/faq/docs/DOC-11259

Affected Products

• Red Hat Enterprise Linux Server 5 x86_64
• Red Hat Enterprise Linux Server 5 ia64
• Red Hat Enterprise Linux Server 5 i386
• Red Hat Enterprise Linux Workstation 5 x86_64
• Red Hat Enterprise Linux Workstation 5 i386
• Red Hat Enterprise Linux Desktop 5 x86_64
• Red Hat Enterprise Linux Desktop 5 i386
• Red Hat Enterprise Linux for IBM z Systems 5 s390x
• Red Hat Enterprise Linux for Power, big endian 5 ppc
• Red Hat Enterprise Linux Server from RHUI 5 x86_64
• Red Hat Enterprise Linux Server from RHUI 5 i386

Fixes

• BZ - 479967 - curl uses 100% of CPU if upload connection is broken
• BZ - 517084 - curl program options differ from option in manual page
• BZ - 517199 - curl, libcurl crash when reusing connection after negotiate-auth
• BZ - 563220 - CVE-2010-0734 curl: zlib-compression causes curl to pass more than CURL_MAX_WRITE_SIZE bytes to write callback

CVEs

• CVE-2010-0734

References

• http://www.redhat.com/security/updates/classification/#moderate

Red Hat Enterprise Linux Server 5

SRPM
curl-7.15.5-9.el5.src.rpm	SHA-256: a6418ff773f33b55f92fa25a17b9e5f5e6c008bf2eeb771a51049a7dba342e84
x86_64
curl-7.15.5-9.el5.i386.rpm	SHA-256: 68a56cf77b74fa9d4e7f626bd4246a7e0737430e3d69e2bc1cfdefac2df3255d
curl-7.15.5-9.el5.x86_64.rpm	SHA-256: 90222af0c79a7004dca989455eae405e2ab0d6dd2b0c9db14b23ed420ff6d94f
curl-devel-7.15.5-9.el5.i386.rpm	SHA-256: e75d2053a675a674f1f7765db80a698b9549b94c7648887086c2ee0f3ea485f8
curl-devel-7.15.5-9.el5.x86_64.rpm	SHA-256: f53e032fcbf5439d667e5421044eedccf3894b1a51a1011c0fc2f9cf8f195603
ia64
curl-7.15.5-9.el5.ia64.rpm	SHA-256: 76119e191acbc83fd7fb5f7da02a0f10aee33bc2f55966d0096bf0346b4435e2
curl-devel-7.15.5-9.el5.ia64.rpm	SHA-256: f9f9544e047c5f7653420e512f181ab0d0479df53a0505b1c27001bf512f6e1b
i386
curl-7.15.5-9.el5.i386.rpm	SHA-256: 68a56cf77b74fa9d4e7f626bd4246a7e0737430e3d69e2bc1cfdefac2df3255d
curl-devel-7.15.5-9.el5.i386.rpm	SHA-256: e75d2053a675a674f1f7765db80a698b9549b94c7648887086c2ee0f3ea485f8

Red Hat Enterprise Linux Workstation 5

SRPM
curl-7.15.5-9.el5.src.rpm	SHA-256: a6418ff773f33b55f92fa25a17b9e5f5e6c008bf2eeb771a51049a7dba342e84
x86_64
curl-7.15.5-9.el5.i386.rpm	SHA-256: 68a56cf77b74fa9d4e7f626bd4246a7e0737430e3d69e2bc1cfdefac2df3255d
curl-7.15.5-9.el5.x86_64.rpm	SHA-256: 90222af0c79a7004dca989455eae405e2ab0d6dd2b0c9db14b23ed420ff6d94f
curl-devel-7.15.5-9.el5.i386.rpm	SHA-256: e75d2053a675a674f1f7765db80a698b9549b94c7648887086c2ee0f3ea485f8
curl-devel-7.15.5-9.el5.x86_64.rpm	SHA-256: f53e032fcbf5439d667e5421044eedccf3894b1a51a1011c0fc2f9cf8f195603
i386
curl-7.15.5-9.el5.i386.rpm	SHA-256: 68a56cf77b74fa9d4e7f626bd4246a7e0737430e3d69e2bc1cfdefac2df3255d
curl-devel-7.15.5-9.el5.i386.rpm	SHA-256: e75d2053a675a674f1f7765db80a698b9549b94c7648887086c2ee0f3ea485f8

Red Hat Enterprise Linux Desktop 5

SRPM
curl-7.15.5-9.el5.src.rpm	SHA-256: a6418ff773f33b55f92fa25a17b9e5f5e6c008bf2eeb771a51049a7dba342e84
x86_64
curl-7.15.5-9.el5.i386.rpm	SHA-256: 68a56cf77b74fa9d4e7f626bd4246a7e0737430e3d69e2bc1cfdefac2df3255d
curl-7.15.5-9.el5.x86_64.rpm	SHA-256: 90222af0c79a7004dca989455eae405e2ab0d6dd2b0c9db14b23ed420ff6d94f
i386
curl-7.15.5-9.el5.i386.rpm	SHA-256: 68a56cf77b74fa9d4e7f626bd4246a7e0737430e3d69e2bc1cfdefac2df3255d

Red Hat Enterprise Linux for IBM z Systems 5

SRPM
curl-7.15.5-9.el5.src.rpm	SHA-256: a6418ff773f33b55f92fa25a17b9e5f5e6c008bf2eeb771a51049a7dba342e84
s390x
curl-7.15.5-9.el5.s390.rpm	SHA-256: 3651975a02f6c9c62784b97d2f7b557bd673efa6c3a9b3b9743d4629cd4e2dd6
curl-7.15.5-9.el5.s390x.rpm	SHA-256: 9551e9e50f29699b2ec2fe3817f4d47bb2b1e91eb107fbd2395b9a2508bb5d85
curl-devel-7.15.5-9.el5.s390.rpm	SHA-256: 9be457cc9f1f8d064f3f7bcc7c1775620ee71f02233e455e8a4ba3c37eee7f56
curl-devel-7.15.5-9.el5.s390x.rpm	SHA-256: 2337173eccdda1af5a05101dc461c8e247e7d04fa22cb312efd6a62dd08c4571

Red Hat Enterprise Linux for Power, big endian 5

SRPM
curl-7.15.5-9.el5.src.rpm	SHA-256: a6418ff773f33b55f92fa25a17b9e5f5e6c008bf2eeb771a51049a7dba342e84
ppc
curl-7.15.5-9.el5.ppc.rpm	SHA-256: ad9b1a418db5042880cae7666428a03b707d2fc70f8e1faa3016b591e34d39f7
curl-7.15.5-9.el5.ppc64.rpm	SHA-256: afb3bb58695a79b32be276e898087fd95bc5070b0fc1f9595144a7dfd510954a
curl-devel-7.15.5-9.el5.ppc.rpm	SHA-256: eadf746868151d7d234036c35107e9ab006b63f8061433472576aefbd9e2c26c
curl-devel-7.15.5-9.el5.ppc64.rpm	SHA-256: e5c21c2da7c00505c4c5235ed52bdf3476651701971e4acc786f76de6cbe0bd5

Red Hat Enterprise Linux Server from RHUI 5

SRPM
curl-7.15.5-9.el5.src.rpm	SHA-256: a6418ff773f33b55f92fa25a17b9e5f5e6c008bf2eeb771a51049a7dba342e84
x86_64
curl-7.15.5-9.el5.i386.rpm	SHA-256: 68a56cf77b74fa9d4e7f626bd4246a7e0737430e3d69e2bc1cfdefac2df3255d
curl-7.15.5-9.el5.x86_64.rpm	SHA-256: 90222af0c79a7004dca989455eae405e2ab0d6dd2b0c9db14b23ed420ff6d94f
curl-devel-7.15.5-9.el5.i386.rpm	SHA-256: e75d2053a675a674f1f7765db80a698b9549b94c7648887086c2ee0f3ea485f8
curl-devel-7.15.5-9.el5.x86_64.rpm	SHA-256: f53e032fcbf5439d667e5421044eedccf3894b1a51a1011c0fc2f9cf8f195603
i386
curl-7.15.5-9.el5.i386.rpm	SHA-256: 68a56cf77b74fa9d4e7f626bd4246a7e0737430e3d69e2bc1cfdefac2df3255d
curl-devel-7.15.5-9.el5.i386.rpm	SHA-256: e75d2053a675a674f1f7765db80a698b9549b94c7648887086c2ee0f3ea485f8