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[ GLSA 201706-07 ] Libtirpc and RPCBind
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PostPosted: Tue Jul 11, 2017 4:26 am    Post subject: [ GLSA 201706-07 ] Libtirpc and RPCBind Reply with quote

Gentoo Linux Security Advisory

Title: Libtirpc and RPCBind: Denial of Service (GLSA 201706-07)
Severity: normal
Exploitable: remote
Date: 2017-06-06
Bug(s): #617472
ID: 201706-07

Synopsis

A vulnerability has been found in Libtirpc and RPCBind which may
allow a remote attacker to cause a Denial of Service condition.


Background

The RPCBind utility is a server that converts RPC program numbers into
universal addresses.
Libtirpc is a port of Suns Transport-Independent RPC library to Linux.

Affected Packages

Package: net-nds/rpcbind
Vulnerable: < 0.2.4-r1
Unaffected: >= 0.2.4-r1
Architectures: All supported architectures

Package: net-libs/libtirpc
Vulnerable: < 1.0.1-r1
Unaffected: >= 1.0.1-r1
Architectures: All supported architectures


Description

It was found that due to the way RPCBind uses libtirpc (libntirpc), a
memory leak can occur when parsing specially crafted XDR messages.


Impact

A remote attacker could send thousands of messages to RPCBind, possibly
resulting in a Denial of Service condition.


Workaround

There is no known workaround at this time.

Resolution

All RPCBind users should upgrade to the latest version:
Code:
# emerge --sync
      # emerge --ask --oneshot --verbose ">=net-nds/rpcbind-0.2.4-r1"
   
All Libtirpc users should upgrade to the latest version:
Code:
# emerge --sync
      # emerge --ask --oneshot --verbose ">=net-libs/libtirpc-1.0.1-r1"
   


References

CVE-2017-8779
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