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AUSCERT External Security Bulletin Redistribution
ESB-2011.0795
A number of vulnerabilities have been identified in Sybase
Adaptive Server Backup
1 August 2011
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AusCERT Security Bulletin Summary
---------------------------------
Product: Sybase Adaptive Server Backup
Publisher: Zero Day Initiative
Operating System: UNIX variants (UNIX, Linux, OSX)
Windows
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Resolution: Patch/Upgrade
Original Bulletin:
http://www.zerodayinitiative.com/advisories/ZDI-11-245/
http://www.zerodayinitiative.com/advisories/ZDI-11-246/
Comment: This bulletin contains two (2) Zero Day Initiative security
advisories.
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Sybase Adaptive Server Backup and Monitor Server Translation Array Remote Code
Execution Vulnerability
ZDI-11-245: July 29th, 2011
CVSS Score
10, (AV:N/AC:L/Au:N/C:C/I:C/A:C)
Affected Vendors
Sybase
Affected Products
Adaptive Server
TippingPoint IPS Customer Protection
TippingPoint IPS customers are protected against this vulnerability by Digital
Vaccine protection filter ID 11463. For further product information on the
TippingPoint IPS:
http://www.tippingpoint.com
Vulnerability Details
This vulnerability allows remote attackers to execute arbitrary code on
vulnerable installations of Sybase Adaptive Server Enterprise. Authentication
is not required to exploit this vulnerability.
The specific flaw exists within the way Sybase Backup and Monitor servers
handle certain data in the login packets. Malformed packets can cause the
service in question to lookup a function pointer outside a predefined function
pointer array. It is possible to set this function pointer to an address where
user controlled data exists and this will result in code execution under the
rights of the user running the Monitor Server.
Vendor Response
Sybase has issued an update to correct this vulnerability. More details can be
found at:
http://www.sybase.com/detail?id=1094235
Disclosure Timeline
2011-01-21 - Vulnerability reported to vendor
2011-07-29 - Coordinated public release of advisory
Credit
This vulnerability was discovered by:
Luigi Auriemma
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Sybase Adaptive Server Backup and Monitor Server NULL Write Remote Code
Execution Vulnerability
ZDI-11-246: July 29th, 2011
CVSS Score
10, (AV:N/AC:L/Au:N/C:C/I:C/A:C)
Affected Vendors
Sybase
Affected Products
Adaptive Server
TippingPoint IPS Customer Protection
TippingPoint IPS customers are protected against this vulnerability by Digital
Vaccine protection filter ID 11463. For further product information on the
TippingPoint IPS:
http://www.tippingpoint.com
Vulnerability Details
This vulnerability allows remote attackers to execute arbitrary code on
vulnerable installations of Sybase Adaptive Server. Authentication is not
required to exploit this vulnerability.
The specific flaw exists within the way Sybase Backup and Monitor servers
handles certain data in the login packets. Malformed packets can cause the
service in question to write a NULL byte on the stack which can be leveraged
by a remote attacker to execute code under the context of the running service.
Vendor Response
Sybase has issued an update to correct this vulnerability. More details can be
found at:
http://www.sybase.com/detail?id=1094235
Disclosure Timeline
2011-02-02 - Vulnerability reported to vendor
2011-07-29 - Coordinated public release of advisory
Credit
This vulnerability was discovered by:
Luigi Auriemma
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