Bugzilla – Bug 934502
VUL-1: CVE-2015-3237: curl: SMB send off unrelated memory contents
Last modified: 2015-06-24 14:22:08 UTC
openSUSE:13.1:Update 7.42.1 affected openSUSE:13.2:Update 7.42.1 affected openSUSE Tumbleweed 7.42.1 affected SLE not affected.
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public at http://curl.haxx.se/docs/adv_20150617B.html SMB send off unrelated memory contents Project cURL Security Advisory, June 17th 2015 - Permalink VULNERABILITY libcurl can get tricked by a malicious SMB server to send off data it did not intend to. In libcurl's state machine function handling the SMB protocol (smb_request_state()), two length and offset values are extracted from data that has arrived over the network, and those values are subsequently used to figure out what data range to send back. The values are used and trusted without boundary checks and are just assumed to be valid. This allows carefully handicrafted packages to trick libcurl into responding and sending off data that was not intended. Or just crash if the values cause libcurl to access invalid memory. We are not aware of any exploit of this flaw. INFO This flaw can also affect the curl command line tool if a similar operation series is made with that. The Common Vulnerabilities and Exposures (CVE) project has assigned the name CVE-2015-3237 to this issue. AFFECTED VERSIONS This flaw is relevant for Affected versions: libcurl 7.40.0 to and including 7.42.1 Not affected versions: libcurl < 7.40.0 and libcurl >= 7.43.0 libcurl is used by many applications, but not always advertised as such! THE SOLUTION In version 7.43.0, libcurl properly range checks the values before they are used. A patch for this problem that changes the default is available at (URL will be updated in final advisory): http://curl.haxx.se/CVE-2015-3237.patch RECOMMENDATIONS We suggest you take one of the following actions immediately, in order of preference: A - Upgrade curl and libcurl to version 7.43.0 B - Apply the patch to your version and rebuild C - Avoid using the SMB protocol TIME LINE It was first brought up with the curl-security team on May 22 2015. We contacted distros@openwall on June 11. libcurl 7.43.0 was released on June 17 2015, coordinated with the publication of this advisory. CREDITS Spotted by Daniel Stenberg. Thanks a lot!
This is an autogenerated message for OBS integration: This bug (934502) was mentioned in https://build.opensuse.org/request/show/312422 13.2+13.1 / curl
update running
openSUSE-SU-2015:1135-1: An update that solves two vulnerabilities and has one errata is now available. Category: security (moderate) Bug References: 851126,934501,934502 CVE References: CVE-2015-3236,CVE-2015-3237 Sources used: openSUSE 13.2 (src): curl-7.42.1-16.1 openSUSE 13.1 (src): curl-7.42.1-2.47.1
released