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[SA31594] Citrix Access Gateway DNS Cache Poisoning
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TITLE:
Citrix Access Gateway DNS Cache Poisoning
SECUNIA ADVISORY ID:
SA31594
VERIFY ADVISORY:
link://[click]
CRITICAL:
Moderately critical
IMPACT:
Spoofing
WHERE:
From remote
OPERATING SYSTEM:
Citrix Access Gateway 4.x
link://[click]
DESCRIPTION:
Citrix has acknowledged a vulnerability in Access Gateway, which can
be exploited by malicious people to poison the DNS cache.
The vulnerability is caused due to Access Gateway not sufficiently
randomising the DNS query port number, which can be exploited to
poison the DNS cache.
The vulnerability is reported in all versions of the Access Gateway
Standard and Advanced Edition appliance firmware up to and including
v 4.5.7 Rev A.
SOLUTION:
Firmware versions 4.5 and later:
Apply firmware hotfix.
link://[click]
Firmware versions prior to 4.5:
The vendor recommends to contact the customer support representative
for assistance.
PROVIDED AND/OR DISCOVERED BY:
Dan Kaminsky, IOActive
ORIGINAL ADVISORY:
link://[click]
About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.
Subscribe:
link://[click]
Definitions: (Criticality, Where etc.)
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Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.
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