REDHAT-BUG-1448124
First published: Thu May 04 2017(Updated: )
Rpcbind does not consider the maximum RPC data size during memory allocation for XDR strings, which allows remote attackers to cause a denial of service (memory consumption with no subsequent free) via a crafted UDP packet to port 111, aka rpcbomb. References: <a href="http://seclists.org/oss-sec/2017/q2/209">http://seclists.org/oss-sec/2017/q2/209</a> <a href="https://guidovranken.wordpress.com/2017/05/03/rpcbomb-remote-rpcbind-denial-of-service-patches/">https://guidovranken.wordpress.com/2017/05/03/rpcbomb-remote-rpcbind-denial-of-service-patches/</a>
| Affected Software | Affected Version | How to fix |
|---|---|---|
| RPCBind |
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Reference Links
- http://seclists.org/oss-sec/2017/q2/209
- https://guidovranken.wordpress.com/2017/05/03/rpcbomb-remote-rpcbind-denial-of-service-patches/
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1448125
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1448126
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1448127
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1448128
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1448124#c6
- https://github.com/guidovranken/rpcbomb/
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1448124#c8
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1448124#c16
- https://bugzilla.redhat.com/show_bug.cgi/attachment.cgi?id=1277059&action=diff
- https://bugzilla.redhat.com/show_bug.cgi/attachment.cgi?id=1277059&action=edit
- https://bugzilla.redhat.com/show_bug.cgi/attachment.cgi?id=1277229&action=diff
- https://bugzilla.redhat.com/show_bug.cgi/attachment.cgi?id=1277229&action=edit
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1448124#c23
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1448124#c26
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1448124#c27
- https://bugzilla.redhat.com/show_bug.cgi/attachment.cgi?id=1277755
- https://bugzilla.redhat.com/show_bug.cgi/attachment.cgi?id=1277755&action=edit
- https://access.redhat.com/solutions/3025811/
- https://access.redhat.com/errata/RHSA-2017:1262
- https://access.redhat.com/errata/RHSA-2017:1263
- https://access.redhat.com/errata/RHSA-2017:1267
- https://access.redhat.com/errata/RHSA-2017:1268
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1454876
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1455142
- https://access.redhat.com/errata/RHSA-2017:1395
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1448124#c47
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1448124#c43
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1458240
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1457172
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1448124#c49
- https://access.redhat.com/errata/RHBA-2017:1435
- https://access.redhat.com/errata/RHBA-2017:1436
- https://access.redhat.com/errata/RHBA-2017:1497
- https://bugzilla.redhat.com/show_bug.cgi?id=1448124
Frequently Asked Questions
What is the severity of REDHAT-BUG-1448124?
The severity of REDHAT-BUG-1448124 is critical due to its potential to cause a denial of service.
How do I fix REDHAT-BUG-1448124?
To fix REDHAT-BUG-1448124, update to the latest patched version of rpcbind provided by your operating system vendor.
What causes the vulnerability in REDHAT-BUG-1448124?
The vulnerability in REDHAT-BUG-1448124 is caused by rpcbind not considering the maximum RPC data size during memory allocation.
Who can exploit the vulnerability in REDHAT-BUG-1448124?
Remote attackers can exploit the vulnerability in REDHAT-BUG-1448124 by sending crafted UDP packets to port 111.
What are the consequences of not addressing REDHAT-BUG-1448124?
Not addressing REDHAT-BUG-1448124 can lead to system memory exhaustion and potential denial of service.
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- source/Red Hat
- alias/CVE-2017-8779
- agent/source
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- agent/severity
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- agent/event
- agent/tags
- agent/softwarecombine
- agent/guess-ai
- agent/software-canonical-lookup
- agent/software-canonical-lookup-request
- vendor/sun
- canonical/rpcbind