(Red Hat Issues Fix) Rpcbind Memory Leak in rpcb_service_4() Lets Remote Users Consume Excessive Memory Resources
|
|
SecurityTracker Alert ID: 1038533 |
|
SecurityTracker URL: http://securitytracker.com/id/1038533
|
|
CVE Reference:
CVE-2017-8779
(Links to External Site)
|
Date: May 22 2017
|
Impact:
Denial of service via network
|
Fix Available: Yes Vendor Confirmed: Yes Exploit Included: Yes
|
|
Description:
A vulnerability was reported in Rpcbind. A remote user can consume excessive memory on the target system.
A remote user can send a large number of specially crafted XDR messages to trigger a memory leak in rpcb_service_4() to consume excessive memory on the target system.
The vulnerability resides in the libntirpc component.
The original advisory and demonstration exploit is available at:
https://guidovranken.wordpress.com/2017/05/03/rpcbomb-remote-rpcbind-denial-of-service-patches/
Guido Vranken reported this vulnerability.
|
Impact:
A remote user can consume excessive memory resources on the target system.
|
Solution:
Red Hat has issued a fix.
The Red Hat advisory is available at:
https://access.redhat.com/errata/RHSA-2017:1262
|
Vendor URL: access.redhat.com/errata/RHSA-2017:1262 (Links to External Site)
|
Cause:
Resource error
|
Underlying OS: Linux (Red Hat Enterprise)
|
Underlying OS Comments: 7
|
|
Message History:
This archive entry is a follow-up to the message listed below.
|
Source Message Contents
|
Subject: [RHSA-2017:1262-01] Important: rpcbind security update
|
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
=====================================================================
Red Hat Security Advisory
Synopsis: Important: rpcbind security update
Advisory ID: RHSA-2017:1262-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2017:1262
Issue date: 2017-05-22
CVE Names: CVE-2017-8779
=====================================================================
1. Summary:
An update for rpcbind is now available for Red Hat Enterprise Linux 7.
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 Client (v. 7) - x86_64
Red Hat Enterprise Linux ComputeNode (v. 7) - x86_64
Red Hat Enterprise Linux Server (v. 7) - aarch64, ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Workstation (v. 7) - 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 Client (v. 7):
Source:
rpcbind-0.2.0-38.el7_3.src.rpm
x86_64:
rpcbind-0.2.0-38.el7_3.x86_64.rpm
rpcbind-debuginfo-0.2.0-38.el7_3.x86_64.rpm
Red Hat Enterprise Linux ComputeNode (v. 7):
Source:
rpcbind-0.2.0-38.el7_3.src.rpm
x86_64:
rpcbind-0.2.0-38.el7_3.x86_64.rpm
rpcbind-debuginfo-0.2.0-38.el7_3.x86_64.rpm
Red Hat Enterprise Linux Server (v. 7):
Source:
rpcbind-0.2.0-38.el7_3.src.rpm
aarch64:
rpcbind-0.2.0-38.el7_3.aarch64.rpm
rpcbind-debuginfo-0.2.0-38.el7_3.aarch64.rpm
ppc64:
rpcbind-0.2.0-38.el7_3.ppc64.rpm
rpcbind-debuginfo-0.2.0-38.el7_3.ppc64.rpm
ppc64le:
rpcbind-0.2.0-38.el7_3.ppc64le.rpm
rpcbind-debuginfo-0.2.0-38.el7_3.ppc64le.rpm
s390x:
rpcbind-0.2.0-38.el7_3.s390x.rpm
rpcbind-debuginfo-0.2.0-38.el7_3.s390x.rpm
x86_64:
rpcbind-0.2.0-38.el7_3.x86_64.rpm
rpcbind-debuginfo-0.2.0-38.el7_3.x86_64.rpm
Red Hat Enterprise Linux Workstation (v. 7):
Source:
rpcbind-0.2.0-38.el7_3.src.rpm
x86_64:
rpcbind-0.2.0-38.el7_3.x86_64.rpm
rpcbind-debuginfo-0.2.0-38.el7_3.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.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1
iD8DBQFZImGhXlSAg2UNWIIRAh7TAJ9tlg3/AaQtejXB4xCaWGv7O2bGXACfZQXh
/KHbCaDWXW5upkT0sOkxOUg=
=Lz5V
-----END PGP SIGNATURE-----
--
Enterprise-watch-list mailing list
Enterprise-watch-list@redhat.com
https://www.redhat.com/mailman/listinfo/enterprise-watch-list
|
|
