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Category:   Application (Security)  >   FreeRADIUS Vendors:   FreeRADIUS Server Project
(Red Hat Issues Fix) FreeRADIUS Overflows and Memory Leaks Let Remote Users Deny Service and Execute Arbitrary Code
SecurityTracker Alert ID:  1038916
SecurityTracker URL:  http://securitytracker.com/id/1038916
CVE Reference:   CVE-2017-10978, CVE-2017-10979, CVE-2017-10980, CVE-2017-10981, CVE-2017-10982, CVE-2017-10983   (Links to External Site)
Date:  Jul 18 2017
Impact:   Denial of service via network, Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 2.0.0 through 3.0.14
Description:   Multiple vulnerabilities were reported in FreeRADIUS. A remote user can cause denial of service conditions on the target system. A remote user can execute arbitrary code on the target system.

A remote user can send specially crafted RADIUS data to trigger an overflow in make_secret() and cause the target service to crash [CVE-2017-10978].

A remote user can send specially crafted RADIUS data to trigger an overflow in rad_coalesce() and execute arbitrary code on the target system [CVE-2017-10979]. The code will run with the privileges of the target service. Versions 2.0.0 through 2.2.9 are affected.

A remote user can send specially crafted DHCP data to trigger a memory leak in decode_tlv() and consume excessive memory on the target system [CVE-2017-10980]. Versions 2.0.0 through 2.2.9 are affected.

A remote user can send specially crafted DHCP data to trigger a memory leak in fr_dhcp_decode() and consume excessive memory on the target system [CVE-2017-10981]. Versions 2.0.0 through 2.2.9 are affected.

A remote user can send specially crafted DHCP data to trigger a read overflow in fr_dhcp_decode_options() and cause the target service to crash [CVE-2017-10982]. Versions 2.0.0 through 2.2.9 are affected.

A remote user can send specially crafted DHCP option 63 data to trigger a read overflow in fr_dhcp_decode_options() and cause the target service to crash [CVE-2017-10983].

Guido Vranken reported these vulnerabilities.

Impact:   A remote user can cause denial of service conditions.

A remote user can execute arbitrary code on the target system.

Solution:   Red Hat has issued a fix.

The Red Hat advisory is available at:

https://access.redhat.com/errata/RHSA-2017:1759

Vendor URL:  access.redhat.com/errata/RHSA-2017:1759 (Links to External Site)
Cause:   Access control error, Boundary error
Underlying OS:  Linux (Red Hat Enterprise)
Underlying OS Comments:  6

Message History:   This archive entry is a follow-up to the message listed below.
Jul 18 2017 FreeRADIUS Overflows and Memory Leaks Let Remote Users Deny Service and Execute Arbitrary Code



 Source Message Contents

Subject:  [RHSA-2017:1759-01] Important: freeradius security update

-----BEGIN PGP SIGNED MESSAGE-----
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=====================================================================
                   Red Hat Security Advisory

Synopsis:          Important: freeradius security update
Advisory ID:       RHSA-2017:1759-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2017:1759
Issue date:        2017-07-18
CVE Names:         CVE-2017-10978 CVE-2017-10979 CVE-2017-10980 
                   CVE-2017-10981 CVE-2017-10982 CVE-2017-10983 
=====================================================================

1. Summary:

An update for freeradius 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 Server (v. 6) - i386, ppc64, s390x, x86_64
Red Hat Enterprise Linux Server Optional (v. 6) - i386, ppc64, s390x, x86_64
Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64
Red Hat Enterprise Linux Workstation Optional (v. 6) - i386, x86_64

3. Description:

FreeRADIUS is a high-performance and highly configurable free Remote
Authentication Dial In User Service (RADIUS) server, designed to allow
centralized authentication and authorization for a network.

Security Fix(es):

* An out-of-bounds write flaw was found in the way FreeRADIUS server
handled certain attributes in request packets. A remote attacker could use
this flaw to crash the FreeRADIUS server or to execute arbitrary code in
the context of the FreeRADIUS server process by sending a specially crafted
request packet. (CVE-2017-10979)

* An out-of-bounds read and write flaw was found in the way FreeRADIUS
server handled RADIUS packets. A remote attacker could use this flaw to
crash the FreeRADIUS server by sending a specially crafted RADIUS packet.
(CVE-2017-10978)

* Multiple memory leak flaws were found in the way FreeRADIUS server
handled decoding of DHCP packets. A remote attacker could use these flaws
to cause the FreeRADIUS server to consume an increasing amount of memory
resources over time, possibly leading to a crash due to memory exhaustion,
by sending specially crafted DHCP packets. (CVE-2017-10980, CVE-2017-10981)

* Multiple out-of-bounds read flaws were found in the way FreeRADIUS server
handled decoding of DHCP packets. A remote attacker could use these flaws
to crash the FreeRADIUS server by sending a specially crafted DHCP request.
(CVE-2017-10982, CVE-2017-10983)

Red Hat would like to thank the FreeRADIUS project for reporting these
issues. Upstream acknowledges Guido Vranken as the original reporter of
these issues.

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/):

1468487 - CVE-2017-10978 freeradius: Out-of-bounds read/write due to improper output buffer size check in make_secret()
1468490 - CVE-2017-10979 freeradius: Out-of-bounds write in rad_coalesce()
1468493 - CVE-2017-10980 freeradius: Memory leak in decode_tlv()
1468495 - CVE-2017-10981 freeradius: Memory leak in fr_dhcp_decode()
1468498 - CVE-2017-10982 freeradius: Out-of-bounds read in fr_dhcp_decode_options()
1468503 - CVE-2017-10983 freeradius: Out-of-bounds read in fr_dhcp_decode() when decoding option 63

6. Package List:

Red Hat Enterprise Linux Server (v. 6):

Source:
freeradius-2.2.6-7.el6_9.src.rpm

i386:
freeradius-2.2.6-7.el6_9.i686.rpm
freeradius-debuginfo-2.2.6-7.el6_9.i686.rpm

ppc64:
freeradius-2.2.6-7.el6_9.ppc64.rpm
freeradius-debuginfo-2.2.6-7.el6_9.ppc64.rpm

s390x:
freeradius-2.2.6-7.el6_9.s390x.rpm
freeradius-debuginfo-2.2.6-7.el6_9.s390x.rpm

x86_64:
freeradius-2.2.6-7.el6_9.x86_64.rpm
freeradius-debuginfo-2.2.6-7.el6_9.x86_64.rpm

Red Hat Enterprise Linux Server Optional (v. 6):

i386:
freeradius-debuginfo-2.2.6-7.el6_9.i686.rpm
freeradius-krb5-2.2.6-7.el6_9.i686.rpm
freeradius-ldap-2.2.6-7.el6_9.i686.rpm
freeradius-mysql-2.2.6-7.el6_9.i686.rpm
freeradius-perl-2.2.6-7.el6_9.i686.rpm
freeradius-postgresql-2.2.6-7.el6_9.i686.rpm
freeradius-python-2.2.6-7.el6_9.i686.rpm
freeradius-unixODBC-2.2.6-7.el6_9.i686.rpm
freeradius-utils-2.2.6-7.el6_9.i686.rpm

ppc64:
freeradius-debuginfo-2.2.6-7.el6_9.ppc64.rpm
freeradius-krb5-2.2.6-7.el6_9.ppc64.rpm
freeradius-ldap-2.2.6-7.el6_9.ppc64.rpm
freeradius-mysql-2.2.6-7.el6_9.ppc64.rpm
freeradius-perl-2.2.6-7.el6_9.ppc64.rpm
freeradius-postgresql-2.2.6-7.el6_9.ppc64.rpm
freeradius-python-2.2.6-7.el6_9.ppc64.rpm
freeradius-unixODBC-2.2.6-7.el6_9.ppc64.rpm
freeradius-utils-2.2.6-7.el6_9.ppc64.rpm

s390x:
freeradius-debuginfo-2.2.6-7.el6_9.s390x.rpm
freeradius-krb5-2.2.6-7.el6_9.s390x.rpm
freeradius-ldap-2.2.6-7.el6_9.s390x.rpm
freeradius-mysql-2.2.6-7.el6_9.s390x.rpm
freeradius-perl-2.2.6-7.el6_9.s390x.rpm
freeradius-postgresql-2.2.6-7.el6_9.s390x.rpm
freeradius-python-2.2.6-7.el6_9.s390x.rpm
freeradius-unixODBC-2.2.6-7.el6_9.s390x.rpm
freeradius-utils-2.2.6-7.el6_9.s390x.rpm

x86_64:
freeradius-debuginfo-2.2.6-7.el6_9.x86_64.rpm
freeradius-krb5-2.2.6-7.el6_9.x86_64.rpm
freeradius-ldap-2.2.6-7.el6_9.x86_64.rpm
freeradius-mysql-2.2.6-7.el6_9.x86_64.rpm
freeradius-perl-2.2.6-7.el6_9.x86_64.rpm
freeradius-postgresql-2.2.6-7.el6_9.x86_64.rpm
freeradius-python-2.2.6-7.el6_9.x86_64.rpm
freeradius-unixODBC-2.2.6-7.el6_9.x86_64.rpm
freeradius-utils-2.2.6-7.el6_9.x86_64.rpm

Red Hat Enterprise Linux Workstation (v. 6):

Source:
freeradius-2.2.6-7.el6_9.src.rpm

i386:
freeradius-2.2.6-7.el6_9.i686.rpm
freeradius-debuginfo-2.2.6-7.el6_9.i686.rpm

x86_64:
freeradius-2.2.6-7.el6_9.x86_64.rpm
freeradius-debuginfo-2.2.6-7.el6_9.x86_64.rpm

Red Hat Enterprise Linux Workstation Optional (v. 6):

i386:
freeradius-debuginfo-2.2.6-7.el6_9.i686.rpm
freeradius-krb5-2.2.6-7.el6_9.i686.rpm
freeradius-ldap-2.2.6-7.el6_9.i686.rpm
freeradius-mysql-2.2.6-7.el6_9.i686.rpm
freeradius-perl-2.2.6-7.el6_9.i686.rpm
freeradius-postgresql-2.2.6-7.el6_9.i686.rpm
freeradius-python-2.2.6-7.el6_9.i686.rpm
freeradius-unixODBC-2.2.6-7.el6_9.i686.rpm
freeradius-utils-2.2.6-7.el6_9.i686.rpm

x86_64:
freeradius-debuginfo-2.2.6-7.el6_9.x86_64.rpm
freeradius-krb5-2.2.6-7.el6_9.x86_64.rpm
freeradius-ldap-2.2.6-7.el6_9.x86_64.rpm
freeradius-mysql-2.2.6-7.el6_9.x86_64.rpm
freeradius-perl-2.2.6-7.el6_9.x86_64.rpm
freeradius-postgresql-2.2.6-7.el6_9.x86_64.rpm
freeradius-python-2.2.6-7.el6_9.x86_64.rpm
freeradius-unixODBC-2.2.6-7.el6_9.x86_64.rpm
freeradius-utils-2.2.6-7.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-2017-10978
https://access.redhat.com/security/cve/CVE-2017-10979
https://access.redhat.com/security/cve/CVE-2017-10980
https://access.redhat.com/security/cve/CVE-2017-10981
https://access.redhat.com/security/cve/CVE-2017-10982
https://access.redhat.com/security/cve/CVE-2017-10983
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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