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AUSCERT External Security Bulletin Redistribution
ESB-2015.1174
SOL16505: NTP vulnerability CVE-2015-1798 and SOL16506: NTP
vulnerability CVE-2015-1799
29 April 2015
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AusCERT Security Bulletin Summary
---------------------------------
Product: F5 BIG-IP products
F5 Enterprise Manager
F5 BIG-IQ products
Publisher: F5 Networks
Operating System: Network Appliance
Impact/Access: Denial of Service -- Remote/Unauthenticated
Provide Misleading Information -- Remote/Unauthenticated
Unauthorised Access -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2015-1799 CVE-2015-1798
Reference: ESB-2015.0933
ESB-2015.0899
Original Bulletin:
https://support.f5.com/kb/en-us/solutions/public/16000/500/sol16505.html
https://support.f5.com/kb/en-us/solutions/public/16000/500/sol16506.html
Comment: This bulletin contains two (2) F5 Networks security advisories.
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SOL16505: NTP vulnerability CVE-2015-1798
Security Advisory
Original Publication Date: 04/23/2015
Description
The symmetric-key feature in the receive function in ntp_proto.c in ntpd in
NTP 4.x before 4.2.8p2 requires a correct MAC only if the MAC field has a
nonzero length, which makes it easier for man-in-the-middle attackers to spoof
packets by omitting the MAC. (CVE-2015-1798)
Impact
For BIG-IP systems using a default network time protocol (NTP) configuration,
there is no impact. However, BIG-IP systems with an NTP configuration that is
customized in line with the requirements of the advisory may be vulnerable.
Status
F5 Product Development has assigned ID 515345 (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 Severity Vulnerable component or feature
BIG-IP LTM 11.6.0 HF4 and later 11.0.0 - 11.6.0 HF3
10.1.0 - 10.2.4 Low NTP daemon
BIG-IP AAM 11.6.0 HF4 and later 11.4.0 - 11.6.0 HF3 Low NTP daemon
BIG-IP AFM 11.6.0 HF4 and later 11.3.0 - 11.6.0 HF3 Low NTP daemon
BIG-IP Analytics 11.6.0 HF4 and later 11.0.0 - 11.6.0 HF3 Low NTP daemon
BIG-IP APM 11.6.0 HF4 and later 11.0.0 - 11.6.0 HF3
10.1.0 - 10.2.4 Low NTP daemon
BIG-IP ASM 11.6.0 HF4 and later 11.0.0 - 11.6.0 HF3
10.1.0 - 10.2.4 Low NTP daemon
BIG-IP Edge Gateway None 11.0.0 - 11.3.0
10.1.0 - 10.2.4 Not vulnerable None
BIG-IP GTM 11.6.0 HF4 and later 11.0.0 - 11.6.0 HF3
10.1.0 - 10.2.4 Low NTP daemon
BIG-IP Link Controller 11.6.0 HF4 and later 11.0.0 - 11.6.0 HF3
10.1.0 - 10.2.4 Low NTP daemon
BIG-IP PEM 11.6.0 HF4 and later 11.3.0 - 11.6.0 HF3 Low NTP daemon
BIG-IP PSM None 11.0.0 - 11.4.1
10.1.0 - 10.2.4 Not vulnerable NTP daemon
BIG-IP WebAccelerator None 11.0.0 - 11.3.0
10.1.0 - 10.2.4 Not vulnerable None
BIG-IP WOM None 11.0.0 - 11.3.0
10.1.0 - 10.2.4 Not vulnerable None
ARX None 6.0.0 - 6.4.0 Not vulnerable None
Enterprise Manager None 3.0.0 - 3.1.1 Not vulnerable None
FirePass None 7.0.0
6.0.0 - 6.1.0 Not vulnerable None
BIG-IQ Cloud None 4.0.0 - 4.5.0 Not vulnerable None
BIG-IQ Device None 4.2.0 - 4.5.0 Not vulnerable None
BIG-IQ Security None 4.0.0 - 4.5.0 Not vulnerable None
BIG-IQ ADC None 4.5.0 Not vulnerable None
LineRate None 2.2.0 - 2.5.1 Not vulnerable None
F5 WebSafe None 1.0.0 Not vulnerable None
Traffix SDC None 4.0.0 - 4.1.0
3.3.2 - 3.5.1 Not vulnerable None
Note: As of February 17, 2015, AskF5 Security Advisory articles include the
Severity value. Security Advisory articles published before this date do not
list a Severity value.
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 responds to vulnerabilities in accordance with the Severity values
published in the previous table. The Severity values and other security
vulnerability parameters are defined in SOL4602: Overview of the F5 security
vulnerability response policy.
To mitigate this vulnerability, you can revert any NTP configuration
customizations that exposed the vulnerability.
Impact of action: The impact of the suggested workaround will depend on the
specific environment. F5 recommends testing any such changes during a
maintenance window with consideration to the possible impact on your specific
environment.
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
SOL13123: Managing BIG-IP product hotfixes (11.x)
- ------------------------------------------------------------------------
SOL16506: NTP vulnerability CVE-2015-1799
Security Advisory
Original Publication Date: 04/24/2015
Description
The symmetric-key feature in the receive function in ntp_proto.c in ntpd in
NTP 3.x and 4.x before 4.2.8p2 performs state-variable updates upon receiving
certain invalid packets, which makes it easier for man-in-the-middle attackers
to cause a denial of service (synchronization loss) by spoofing the source IP
address of a peer. CVE-2015-1799
Impact
There is no impact for BIG-IP systems using a default NTP configuration.
However, BIG-IP systems with an NTP configuration customized to use symmetric
authentication in line with the requirements of the advisory may be
vulnerable.
Status
F5 Product Development has assigned ID 515347 (BIG-IP), ID 517524 (BIG-IQ) and
ID 517526 (Enterprise Manager) 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 Severity Vulnerable component or feature
BIG-IP LTM 11.0.0 - 11.6.0
10.1.0 - 10.2.4 None Low NTP daemon
BIG-IP AAM 11.4.0 - 11.6.0 None Low NTP daemon
BIG-IP AFM 11.3.0 - 11.6.0 None Low NTP daemon
BIG-IP Analytics 11.0.0 - 11.6.0 None Low NTP daemon
BIG-IP APM 11.0.0 - 11.6.0
10.1.0 - 10.2.4 None Low NTP daemon
BIG-IP ASM 11.0.0 - 11.6.0
10.1.0 - 10.2.4 None Low NTP daemon
BIG-IP Edge Gateway 11.0.0 - 11.3.0
10.1.0 - 10.2.4 None Low NTP daemon
BIG-IP GTM 11.0.0 - 11.6.0
10.1.0 - 10.2.4 None Low NTP daemon
BIG-IP Link Controller 11.0.0 - 11.6.0
10.1.0 - 10.2.4 None Low NTP daemon
BIG-IP PEM 11.3.0 - 11.6.0 None Low NTP daemon
BIG-IP PSM 11.0.0 - 11.4.1
10.1.0 - 10.2.4 None Low NTP daemon
BIG-IP WebAccelerator 11.0.0 - 11.3.0
10.1.0 - 10.2.4 None Low NTP daemon
BIG-IP WOM 11.0.0 - 11.3.0
10.1.0 - 10.2.4 None Low NTP daemon
ARX None 6.0.0 - 6.4.0 Not vulnerable None
Enterprise Manager 3.0.0 - 3.1.1 None Low NTP daemon
FirePass None 7.0.0
6.0.0 - 6.1.0 Not vulnerable None
BIG-IQ Cloud 4.0.0 - 4.5.0 None Low NTP daemon
BIG-IQ Device 4.2.0 - 4.5.0 None Low NTP daemon
BIG-IQ Security 4.0.0 - 4.5.0 None Low NTP daemon
BIG-IQ ADC 4.5.0 None Low NTP daemon
LineRate None 2.2.0 - 2.5.1
1.6.0 - 1.6.4 Not vulnerable None
F5 WebSafe None 1.0.0 Not vulnerable None
Traffix SDC None 4.0.0 - 4.1.0
3.3.2 - 3.5.1 Not vulnerable None
Note: As of February 17, 2015, AskF5 Security Advisory articles include the
Severity value. Security Advisory articles published before this date do not
list a Severity value.
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 responds to vulnerabilities in accordance with the Severity values
published in the previous table. The Severity values and other security
vulnerability parameters are defined in SOL4602: Overview of the F5 security
vulnerability response policy.
To mitigate this vulnerability, you can revert any NTP symmetric
authentication configuration customizations that exposed the vulnerability.
Impact of action: The impact of the suggested workaround will depend on the
specific environment. F5 recommends that you test any such changes during a
maintenance window, and consider the possible impact on your specific
environment.
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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