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AUSCERT Security Bulletin
ASB-2010.0034.2
PostgreSQL: Unpatched Vulnerability Disclosed
30 April 2010
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AusCERT Security Bulletin Summary
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Product: PostgreSQL
Operating System: UNIX variants (UNIX, Linux, OSX)
Windows
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
Increased Privileges -- Existing Account
Denial of Service -- Existing Account
Resolution: Mitigation
Revision History: April 30 2010: Corrected impacts to reflect the requirement
for an existing account
January 28 2010: Initial Release
OVERVIEW
A security vulnerability has been reported in PostgreSQL.
IMPACT
Security researcher Evgeny Legerov has published details of a
vulnerability reportedly affecting PostgreSQL 8.0.23:
"PostgreSQL 8.0.23 bitsubstr overflow" [1]
The current proof of concept will most likely cause a Denial of
Service, but could possibly be modified to execute arbitrary code
and or increase account privileges. Existing access to the database,
either directly or via an application querying the database, is
required in order to use this exploit.
MITIGATION
At the time of this publication there was no response or patches
from PostgreSQL.
Until a patch becomes available users should consider restricting
network access to the PostgreSQL database and monitor traffic and
system performance for unusual activity. In cases where an
external application queries the database, user input should be
sanitised before being run.
REFERENCES
[1] PostgreSQL 8.0.23 bitsubstr overflow
http://intevydis.blogspot.com/2010/01/postgresql-8023-bitsubstr-overflow.html
AusCERT has made every effort to ensure that the information contained
in this document is accurate. However, the decision to use the information
described is the responsibility of each user or organisation. The decision to
follow or act on information or advice contained in this security bulletin is
the responsibility of each user or organisation, and should be considered in
accordance with your organisation's site policies and procedures. AusCERT
takes no responsibility for consequences which may arise from following or
acting on information or advice contained in this security bulletin.
If you believe that your computer system has been compromised or attacked in
any way, we encourage you to let us know by completing the secure National IT
Incident Reporting Form at:
http://www.auscert.org.au/render.html?it=3192
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Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for member emergencies only.
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