Bug 1468552 (CVE-2017-10987) - CVE-2017-10987 freeradius: Buffer over-read in fr_dhcp_decode_suboptions()
Summary: CVE-2017-10987 freeradius: Buffer over-read in fr_dhcp_decode_suboptions()
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2017-10987
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: 1469421 1469422 1471865
Blocks: 1468570
TreeView+ depends on / blocked
 
Reported: 2017-07-07 11:52 UTC by Adam Mariš
Modified: 2019-09-29 14:15 UTC (History)
6 users (show)

Fixed In Version: freeradius 3.0.15
Doc Type: If docs needed, set a value
Doc Text:
An out-of-bounds read flaw was found in the way FreeRADIUS server handled decoding of DHCP packets. A remote attacker could use this flaw to crash the FreeRADIUS server by sending a specially crafted DHCP request.
Clone Of:
Environment:
Last Closed: 2017-08-02 09:42:27 UTC


Attachments (Terms of Use)
Proposed patch (1.02 KB, patch)
2017-07-07 12:03 UTC, Adam Mariš
no flags Details | Diff


Links
System ID Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2017:2389 normal SHIPPED_LIVE Important: freeradius security update 2017-08-01 19:45:02 UTC

Description Adam Mariš 2017-07-07 11:52:58 UTC
The fr_dhcp_decode_suboptions() function does not properly check if sub-options overflow the packet. The server can read up to a small number of 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: 3.0.0 through 3.0.14, inclusive.

Comment 1 Adam Mariš 2017-07-07 11:53:05 UTC
Acknowledgments:

Name: the FreeRADIUS project
Upstream: Guido Vranken

Comment 2 Adam Mariš 2017-07-07 12:03:43 UTC
Created attachment 1295267 [details]
Proposed patch

Comment 5 Dhiru Kholia 2017-07-17 14:40:38 UTC
Created freeradius tracking bugs for this issue:

Affects: fedora-all [bug 1471865]

Comment 6 errata-xmlrpc 2017-08-01 23:25:25 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2017:2389 https://access.redhat.com/errata/RHSA-2017:2389

Comment 7 Dhiru Kholia 2017-08-02 09:42:36 UTC
External References:

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


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