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Red Hat Enterprise Linux 7 RHSA-2017-1262-01 Important rpcbind Memory Leak

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Calendar Grey May 22, 2017
Scroller Redhat
A recent security bulletin for Red Hat Enterprise Linux 7 emphasizes a significant update to rpcbind along with a crucial resolution for a memory leak vulnerability.
An update for rpcbind is now available for Red Hat Enterprise Linux 7

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

Summary

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)

Topics%20covered

Topics Covered

security advisory Red Hat important memory leak rpcbind

References

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

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/


Severity
important
Lowest
Low
Medium
High
Critical

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

Topic

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 impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory Red Hat important memory leak rpcbind

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

Bugs Fixed

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

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