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CUPS SNMP Backend "asn1_get_string()" Signedness Vulnerability
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Secunia Advisory:
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SA28129
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Release Date:
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2007-12-18
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Last Update:
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2007-12-19
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Popularity:
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5,419 views
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Critical:
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Moderately critical
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Impact:
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DoS
System access
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Where:
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From local network
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Solution Status:
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Vendor Patch
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| Software: | CUPS 1.x
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Binary Analysis:
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BA330 :: Available for 1 Credit 
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| CVE reference: | CVE-2007-5849
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Description:
A vulnerability has been reported in CUPS, which can be exploited by malicious people to cause a DoS (Denial of Service) or potentially compromise a vulnerable system.
The vulnerability is caused due to a signedness error within the "asn1_get_string()" function in backend/snmp.c. This can be exploited to cause a stack-based buffer overflow via specially crafted SNMP responses containing ASN1 encoded strings with negative length values.
Successful exploitation on 1.3.x versions requires that the snmp backend is configured in snmp.conf.
The vulnerability is reported in 1.2.x and 1.3.x versions prior to 1.3.5.
Solution:
Update to version 1.3.5.
Provided and/or discovered by:
The vendor credits Wei Wang of McAfee AVERT Research.
Changelog:
2007-12-19: Added CVE reference.
Original Advisory:
http://www.cups.org/str.php?L2589
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
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