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Sicherheit: Denial of Service in rpcbind
Aktuelle Meldungen Distributionen
Name: Denial of Service in rpcbind
ID: RHSA-2017:1267-01
Distribution: Red Hat
Plattformen: Red Hat Enterprise Linux
Datum: Di, 23. Mai 2017, 16:57
Referenzen: https://access.redhat.com/security/cve/CVE-2017-8779

Originalnachricht

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=====================================================================
Red Hat Security Advisory

Synopsis: Important: rpcbind security update
Advisory ID: RHSA-2017:1267-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2017:1267
Issue date: 2017-05-23
CVE Names: CVE-2017-8779
=====================================================================

1. Summary:

An update for rpcbind is now available for Red Hat Enterprise Linux 6.

Red Hat Product Security has rated this update as having a security impact
of Important. A Common Vulnerability Scoring System (CVSS) base score,
which gives a detailed severity rating, is available for each vulnerability
from the CVE link(s) in the References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Desktop (v. 6) - i386, x86_64
Red Hat Enterprise Linux HPC Node (v. 6) - x86_64
Red Hat Enterprise Linux Server (v. 6) - i386, ppc64, s390x, x86_64
Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64

3. Description:

The rpcbind utility is a server that converts Remote Procedure Call (RPC)
program numbers into universal addresses. It must be running on the host to
be able to make RPC calls on a server on that machine.

Security Fix(es):

* It was found that due to the way rpcbind uses libtirpc (libntirpc), a
memory leak can occur when parsing specially crafted XDR messages. An
attacker sending thousands of messages to rpcbind could cause its memory
usage to grow without bound, eventually causing it to be terminated by the
OOM killer. (CVE-2017-8779)

4. Solution:

For details on how to apply this update, which includes the changes
described in this advisory, refer to:

https://access.redhat.com/articles/11258

5. Bugs fixed (https://bugzilla.redhat.com/):

1448124 - CVE-2017-8779 rpcbind, libtirpc, libntirpc: Memory leak when failing
to parse XDR strings or bytearrays

6. Package List:

Red Hat Enterprise Linux Desktop (v. 6):

Source:
rpcbind-0.2.0-13.el6_9.src.rpm

i386:
rpcbind-0.2.0-13.el6_9.i686.rpm
rpcbind-debuginfo-0.2.0-13.el6_9.i686.rpm

x86_64:
rpcbind-0.2.0-13.el6_9.x86_64.rpm
rpcbind-debuginfo-0.2.0-13.el6_9.x86_64.rpm

Red Hat Enterprise Linux HPC Node (v. 6):

Source:
rpcbind-0.2.0-13.el6_9.src.rpm

x86_64:
rpcbind-0.2.0-13.el6_9.x86_64.rpm
rpcbind-debuginfo-0.2.0-13.el6_9.x86_64.rpm

Red Hat Enterprise Linux Server (v. 6):

Source:
rpcbind-0.2.0-13.el6_9.src.rpm

i386:
rpcbind-0.2.0-13.el6_9.i686.rpm
rpcbind-debuginfo-0.2.0-13.el6_9.i686.rpm

ppc64:
rpcbind-0.2.0-13.el6_9.ppc64.rpm
rpcbind-debuginfo-0.2.0-13.el6_9.ppc64.rpm

s390x:
rpcbind-0.2.0-13.el6_9.s390x.rpm
rpcbind-debuginfo-0.2.0-13.el6_9.s390x.rpm

x86_64:
rpcbind-0.2.0-13.el6_9.x86_64.rpm
rpcbind-debuginfo-0.2.0-13.el6_9.x86_64.rpm

Red Hat Enterprise Linux Workstation (v. 6):

Source:
rpcbind-0.2.0-13.el6_9.src.rpm

i386:
rpcbind-0.2.0-13.el6_9.i686.rpm
rpcbind-debuginfo-0.2.0-13.el6_9.i686.rpm

x86_64:
rpcbind-0.2.0-13.el6_9.x86_64.rpm
rpcbind-debuginfo-0.2.0-13.el6_9.x86_64.rpm

These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/

7. References:

https://access.redhat.com/security/cve/CVE-2017-8779
https://access.redhat.com/security/updates/classification/#important

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2017 Red Hat, Inc.
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