Bug 1468498 (CVE-2017-10982) - CVE-2017-10982 freeradius: Out-of-bounds read in fr_dhcp_decode_options()
Summary: CVE-2017-10982 freeradius: Out-of-bounds read in fr_dhcp_decode_options()
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2017-10982
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1469124 1469125 1471858
Blocks: 1468570
TreeView+ depends on / blocked
 
Reported: 2017-07-07 09:10 UTC by Adam Mariš
Modified: 2021-02-17 01:58 UTC (History)
6 users (show)

Fixed In Version: freeradius 2.2.10
Clone Of:
Environment:
Last Closed: 2017-08-02 09:39:35 UTC
Embargoed:

Attachments (Terms of Use)
Proposed patch (775 bytes, patch)
2017-07-07 12:12 UTC, Adam Mariš 		no flags Details | Diff
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Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2017:1759 0 normal SHIPPED_LIVE Important: freeradius security update 2017-07-18 07:41:08 UTC

Description Adam Mariš 2017-07-07 09:10:17 UTC 
The fr_dhcp_decode_options() function does not do proper bounds checks on option lengths, leading to out-of-bounds read.

The server can read up to 253 octets more data than it should. Depending on memory layout, this read may initiate a page fault, and cause the server to crash. 

The security impact is denial of service by any network device capable of sending DHCP packets to FreeRADIUS, which sends packets with malformed options.

Affected versions: 2.0.0 through 2.2.9, inclusive.
Comment 1 Adam Mariš 2017-07-07 09:10:25 UTC 
Acknowledgments:

Name: the FreeRADIUS project
Upstream: Guido Vranken
Comment 2 Adam Mariš 2017-07-07 12:12:19 UTC 
Created attachment 1295277 [details]
Proposed patch
Comment 6 Dhiru Kholia 2017-07-17 14:34:49 UTC 
Created freeradius tracking bugs for this issue:

Affects: fedora-all [bug 1471858]
Comment 7 errata-xmlrpc 2017-07-18 03:42:20 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2017:1759 https://access.redhat.com/errata/RHSA-2017:1759
Comment 8 Dhiru Kholia 2017-08-02 09:44:20 UTC 
External References:

http://freeradius.org/security/fuzzer-2017.html
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