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AUSCERT External Security Bulletin Redistribution
ESB-2015.0008
Multiple NTP vulnerabilities may affect products by F5 networks
5 January 2015
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AusCERT Security Bulletin Summary
---------------------------------
Product: F5 products
Publisher: F5 Networks
Operating System: Network Appliance
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Denial of Service -- Remote/Unauthenticated
Reduced Security -- Remote/Unauthenticated
Resolution: Mitigation
CVE Names: CVE-2014-9296 CVE-2014-9295 CVE-2014-9294
CVE-2014-9293
Reference: ASB-2014.0145
ESB-2015.0006
ESB-2014.2519
ESB-2014.2497
ESB-2014.2476
ESB-2014.2473
ESB-2014.2472
Original Bulletin:
https://support.f5.com/kb/en-us/solutions/public/15000/900/sol15934.html
https://support.f5.com/kb/en-us/solutions/public/15000/900/sol15935.html
https://support.f5.com/kb/en-us/solutions/public/15000/900/sol15936.html
https://support.f5.com/kb/en-us/solutions/public/15000/900/sol15933.html
Comment: This bulletin contains four (4) F5 Networks security advisories.
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sol15934: NTP vulnerability CVE-2014-9293
Security Advisory
Original Publication Date: 12/23/2014
Updated Date: 12/30/2014
Description
The config_auth function in ntpd in NTP before 4.2.7p11, when an auth key is
not configured, improperly generates a key, which makes it easier for remote
attackers to defeat cryptographic protection mechanisms via a brute-force
attack. (CVE-2014-9293)
Impact
Default NTP configurations composed through the Configuration utility or the
Traffic Management Shell (tmsh) are not vulnerable because auth or key values
are omitted on BIG-IP.
However, if the NTP configuration has been manually customized by modifying
NTP configuration files to include the vulnerable values, such as auth, key,
or autokey options and there are no configured keys, the NTP daemon is
vulnerable. A remote attacker may then be able to access private mode and
control mode queries that require authentication. However, exploitation of this
vulnerability is considered highly unlikely because the attacker would also
need prior knowledge of the NTP destination and be able to guess the key.
Additionally, this configuration would likely not work since matching keys are
a requirement for NTP auth to work.
Status
F5 Product Development has assigned ID 497717 (BIG-IP) to this vulnerability,
and has evaluated the currently supported releases for potential vulnerability.
To determine if your release is known to be vulnerable, the components or
features that are affected by the vulnerability, and for information about
releases or hotfixes that address the vulnerability, refer to the following
table:
Product Versions known to be vulnerable Versions known to be not vulnerable Vulnerable component or feature
BIG-IP LTM 11.0.0 - 11.6.0 None NTP daemon
10.1.0 - 10.2.4
BIG-IP AAM 11.4.0 - 11.6.0 None NTP daemon
BIG-IP AFM 11.3.0 - 11.6.0 None NTP daemon
BIG-IP 11.0.0 - 11.6.0 None NTP daemon
Analytics
BIG-IP APM 11.0.0 - 11.6.0 None NTP daemon
10.1.0 - 10.2.4
BIG-IP ASM 11.0.0 - 11.6.0 None NTP daemon
10.1.0 - 10.2.4
BIG-IP 11.0.0 - 11.3.0 None NTP daemon
Edge Gateway 10.1.0 - 10.2.4
BIG-IP GTM 11.0.0 - 11.6.0 None NTP daemon
10.1.0 - 10.2.4
BIG-IP 11.0.0 - 11.6.0 None NTP daemon
Link Controller 10.1.0 - 10.2.4
BIG-IP PEM 11.3.0 - 11.6.0 None NTP daemon
BIG-IP PSM 11.0.0 - 11.4.1 None NTP daemon
10.1.0 - 10.2.4
BIG-IP 11.0.0 - 11.3.0 None NTP daemon
WebAccelerator 10.1.0 - 10.2.4
BIG-IP WOM 11.0.0 - 11.3.0 None NTP daemon
10.1.0 - 10.2.4
ARX ** ** **
Enterprise ** ** **
Manager
FirePass ** ** **
BIG-IQ Cloud ** ** **
BIG-IQ Device ** ** **
BIG-IQ Security ** ** **
LineRate ** ** **
**Confirmation of vulnerability or non-vulnerability is not presently
available. F5 is still researching the issue for the products indicated, and
will update this article as soon as the information has been confirmed.
Recommended action
If the previous table lists a version in the Versions known to be not
vulnerable column, you can eliminate this vulnerability by upgrading to the
listed version. If the listed version is older than the version you are
currently running, or if the table does not list any version in the column,
then no upgrade candidate currently exists.
F5 is responding to this vulnerability as determined by the parameters defined
in SOL4602: Overview of the F5 security vulnerability response policy.
To mitigate this vulnerability, you should only use the Configuration utility
or tmsh to configure NTP. Additionally, if a system has already been configured
with a vulnerable custom NTP configuration, you should remove the customizations.
Supplemental Information
SOL9970: Subscribing to email notifications regarding F5 products
SOL9957: Creating a custom RSS feed to view new and updated documents.
SOL4918: Overview of the F5 critical issue hotfix policy
SOL167: Downloading software and firmware from F5
SOL14120: Defining advanced NTP configurations on the BIG-IP system (11.x)
SOL11237: Defining advanced NTP configurations on the BIG-IP system (9.x - 10.x)
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sol15935: NTP vulnerability CVE-2014-9294
Security Advisory
Original Publication Date: 12/23/2014
Updated Date: 12/30/2014
Description
util/ntp-keygen.c in ntp-keygen in NTP before 4.2.7p230 uses a weak RNG seed,
which makes it easier for remote attackers to defeat cryptographic protection
mechanisms via a brute-force attack. (CVE-2014-9294)
Impact
Theoretically, a remote attacker can determine a weak key and manipulate NTP
packets. However, no public exploits are known at this time.
Status
F5 Product Development has assigned ID 497718 (BIG-IP) to this vulnerability,
and has evaluated the currently supported releases for potential vulnerability.
To determine if your release is known to be vulnerable, the components or
features that are affected by the vulnerability, and for information about
releases or hotfixes that address the vulnerability, refer to the following
table:
Product Versions known to be vulnerable Versions known to be not vulnerable Vulnerable component or feature
BIG-IP LTM 11.0.0 - 11.6.0* None ntp-keygen utility
10.1.0 - 10.2.4*
BIG-IP AAM 11.4.0 - 11.6.0* None ntp-keygen utility
BIG-IP AFM 11.3.0 - 11.6.0* None ntp-keygen utility
BIG-IP 11.0.0 - 11.6.0* None ntp-keygen utility
Analytics
BIG-IP APM 11.0.0 - 11.6.0* None ntp-keygen utility
10.1.0 - 10.2.4*
BIG-IP ASM 11.0.0 - 11.6.0* None ntp-keygen utility
10.1.0 - 10.2.4*
BIG-IP Edge 11.0.0 - 11.3.0* None ntp-keygen utility
Gateway 10.1.0 - 10.2.4*
BIG-IP GTM 11.0.0 - 11.6.0* None ntp-keygen utility
10.1.0 - 10.2.4*
BIG-IP Link 11.0.0 - 11.6.0* None ntp-keygen utility
Controller 10.1.0 - 10.2.4*
BIG-IP PEM 11.3.0 - 11.6.0* None ntp-keygen utility
BIG-IP PSM 11.0.0 - 11.4.1* None ntp-keygen utility
10.1.0 - 10.2.4*
BIG-IP 11.0.0 - 11.3.0* None ntp-keygen utility
WebAccelerator 10.1.0 - 10.2.4*
BIG-IP WOM 11.0.0 - 11.3.0* None ntp-keygen utility
10.1.0 - 10.2.4*
ARX ** ** **
Enterprise ** ** **
Manager
FirePass ** ** **
BIG-IQ Cloud ** ** **
BIG-IQ Device ** ** **
BIG-IQ Security ** ** **
LineRate ** ** **
*Affected version contains a vulnerable NTP package. However, the affected
ntp-keygen utility is not used by default for NTP configurations. Only NTP
configurations that have been manually customized with keys generated with
the ntp-keygen utility are vulnerable.
**Confirmation of vulnerability or non-vulnerability is not presently
available. F5 is still researching the issue for the products indicated, and
will update this article as soon as the information has been confirmed.
Recommended action
If the previous table lists a version in the Versions known to be not
vulnerable column, you can eliminate this vulnerability by upgrading to the
listed version. If the listed version is older than the version you are
currently running, or if the table does not list any version in the column,
then no upgrade candidate currently exists.
F5 is responding to this vulnerability as determined by the parameters defined
in SOL4602: Overview of the F5 security vulnerability response policy.
To mitigate this vulnerability, you should only use the Configuration utility
or the Traffic Management Shell (tmsh) to configure NTP.
Alternatively, for systems with a customized NTP configuration that uses weak
keys that were generated by a vulnerable ntp-keygen utility, you could replace
the weak keys with new keys generated on a system with a non-vulnerable version
of the ntp-keygen utility.
Supplemental Information
SOL9970: Subscribing to email notifications regarding F5 products
SOL9957: Creating a custom RSS feed to view new and updated documents.
SOL4918: Overview of the F5 critical issue hotfix policy
SOL167: Downloading software and firmware from F5
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sol15936: NTP vulnerability CVE-2014-9295
Security Advisory
Original Publication Date: 12/23/2014
Updated Date: 12/30/2014
Description
Multiple stack-based buffer overflows in ntpd in NTP before 4.2.8 allow remote
attackers to execute arbitrary code via a crafted packet, related to (1) the
crypto_recv function when the Autokey Authentication feature is used, (2) the
ctl_putdata function, and (3) the configure function. (CVE-2014-9295)
Impact
An attacker may be able to execute arbitrary code using a crafted NTP packet.
There are multiple parts to this NTP vulnerability:
(1) The crypoto_rec function is not used in a default NTP configuration. BIG-IP
is vulnerable only if Autokey Authentication is enabled through manual
customizations to NTP configuration files.
(2) The ctl_putdata function impacts BIG-IP as a local-only vulnerability where
the attacker must already be on the system using shell. BIG-IP is vulnerable
with a default NTP configuration.
(3) The configure() function is not found to be used by BIG-IP and the
components needed for the vulnerability are not enabled. BIG-IP is not
vulnerable to this part of the vulnerability.
Status
F5 Product Development has assigned ID 497719 (BIG-IP) to this vulnerability,
and has evaluated the currently supported releases for potential vulnerability.
To determine if your release is known to be vulnerable, the components or
features that are affected by the vulnerability, and for information about
releases or hotfixes that address the vulnerability, refer to the following
table:
Product Versions known to be vulnerable Versions known to be not vulnerable Vulnerable component or feature
BIG-IP LTM 11.0.0 - 11.6.0 None NTP daemon of linux subsystem
10.1.0 - 10.2.4
BIG-IP AAM 11.4.0 - 11.6.0 None NTP daemon of linux subsystem
BIG-IP AFM 11.3.0 - 11.6.0 None NTP daemon of linux subsystem
BIG-IP 11.0.0 - 11.6.0 None NTP daemon of linux subsystem
Analytics
BIG-IP APM 11.0.0 - 11.6.0 None NTP daemon of linux subsystem
10.1.0 - 10.2.4
BIG-IP ASM 11.0.0 - 11.6.0 None NTP daemon of linux subsystem
10.1.0 - 10.2.4
BIG-IP Edge 11.0.0 - 11.3.0 None NTP daemon of linux subsystem
Gateway 10.1.0 - 10.2.4
BIG-IP GTM 11.0.0 - 11.6.0 None NTP daemon of linux subsystem
10.1.0 - 10.2.4
BIG-IP Link 11.0.0 - 11.6.0 None NTP daemon of linux subsystem
Controller 10.1.0 - 10.2.4
BIG-IP PEM 11.3.0 - 11.6.0 None NTP daemon of linux subsystem
BIG-IP PSM 11.0.0 - 11.4.1 None NTP daemon of linux subsystem
10.1.0 - 10.2.4
BIG-IP 11.0.0 - 11.3.0 None NTP daemon of linux subsystem
WebAccelerator 10.1.0 - 10.2.4
BIG-IP WOM 11.0.0 - 11.3.0 None NTP daemon of linux subsystem
10.1.0 - 10.2.4
ARX ** ** **
Enterprise ** ** **
Manager
FirePass ** ** **
BIG-IQ Cloud ** ** **
BIG-IQ Device ** ** **
BIG-IQ Security ** ** **
LineRate ** ** **
**Confirmation of vulnerability or non-vulnerability is not presently
available. F5 is still researching the issue for the products indicated, and
will update this article as soon as the information has been confirmed.
Recommended action
If the previous table lists a version in the Versions known to be not
vulnerable column, you can eliminate this vulnerability by upgrading to the
listed version. If the listed version is older than the version you are
currently running, or if the table does not list any version in the column,
then no upgrade candidate currently exists.
F5 is responding to this vulnerability as determined by the parameters defined
in SOL4602: Overview of the F5 security vulnerability response policy.
To mitigate this vulnerability, you should only use the Configuration utility
or the Traffic Management Shell (tmsh) to configure NTP. Additionally, you
should only permit management access to F5 products over a secure network and
limit shell access to trusted users.
Additionally, if a system has already been configured with a vulnerable custom
NTP configuration, you should remove the customizations.
Supplemental Information
SOL9970: Subscribing to email notifications regarding F5 products
SOL9957: Creating a custom RSS feed to view new and updated documents.
SOL4918: Overview of the F5 critical issue hotfix policy
SOL167: Downloading software and firmware from F5
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sol15933: NTP vulnerability CVE-2014-9296
Security Advisory
Original Publication Date: 12/23/2014
Updated Date: 12/31/2014
The vulnerability described in this article has been resolved, or does not
affect any F5 products. There will be no further updates, unless new
information is discovered.
Description
The receive function in ntp_proto.c in ntpd in NTP before 4.2.8 continues to
execute after detecting a certain authentication error, which might allow
remote attackers to trigger an unintended association change via crafted
packets. (CVE-2014-9296)
Impact
None. No F5 products are affected by this vulnerability. In currently supported
versions of BIG-IP, the receive() function is not vulnerable. In addition, the
crypto keyword is not used in the default configuration, so CVE-2014-9296 does
not apply.
Status
F5 Product Development has assigned ID 497723 (BIG-IP) to this vulnerability,
and has evaluated the currently supported releases for potential vulnerability.
To determine if your release is known to be vulnerable, the components or
features that are affected by the vulnerability, and for information about
releases or hotfixes that address the vulnerability, refer to the following
table:
Product Versions known to be vulnerable Versions known to be not vulnerable Vulnerable component or feature
BIG-IP LTM None 11.0.0 - 11.6.0 None
10.1.0 - 10.2.4
BIG-IP AAM None 11.4.0 - 11.6.0 None
BIG-IP AFM None 11.3.0 - 11.6.0 None
BIG-IP None 11.0.0 - 11.6.0 None
Analytics
BIG-IP APM None 11.0.0 - 11.6.0 None
10.1.0 - 10.2.4
BIG-IP ASM None 11.0.0 - 11.6.0 None
10.1.0 - 10.2.4
BIG-IP Edge None 11.0.0 - 11.3.0 None
Gateway 10.1.0 - 10.2.4
BIG-IP GTM None 11.0.0 - 11.6.0 None
10.1.0 - 10.2.4
BIG-IP Link None 11.0.0 - 11.6.0 None
Controller 10.1.0 - 10.2.4
BIG-IP PEM None 11.3.0 - 11.6.0 None
BIG-IP PSM None 11.0.0 - 11.4.1 None
10.1.0 - 10.2.4
BIG-IP None 11.0.0 - 11.3.0 None
WebAccelerator 10.1.0 - 10.2.4
BIG-IP WOM None 11.0.0 - 11.3.0 None
10.1.0 - 10.2.4
ARX None 6.0.0 - 6.4.0 None
Enterprise None 3.0.0 - 3.1.1 None
Manager 2.1.0 - 2.3.0
FirePass None 7.0.0 None
6.0.0 - 6.1.0
BIG-IQ Cloud None 4.0.0 - 4.4.0 None
BIG-IQ Device None 4.2.0 - 4.4.0 None
BIG-IQ Security None 4.0.0 - 4.4.0 None
LineRate None 2.2.0 - 2.5.0 None
1.6.0 - 1.6.4
Recommended action
If the previous table lists a version in the Versions known to be not
vulnerable column, you can eliminate this vulnerability by upgrading to the
listed version. If the listed version is older than the version you are
currently running, or if the table does not list any version in the column,
then no upgrade candidate currently exists.
F5 is responding to this vulnerability as determined by the parameters defined
in SOL4602: Overview of the F5 security vulnerability response policy.
Supplemental Information
SOL9970: Subscribing to email notifications regarding F5 products
SOL9957: Creating a custom RSS feed to view new and updated documents
SOL4918: Overview of the F5 critical issue hotfix policy
SOL167: Downloading software and firmware from F5
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