Secunia Research
21/10/05, 20:15
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Secunia Research 21/10/2005
- ZipGenius Multiple Archive Handling Buffer Overflow -
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Table of Contents
Affected Software.......................................... ..........1
Severity.......................................... ...................2
Description of Vulnerability..................................... ....3
Solution.......................................... ...................4
Time Table............................................. ..............5
Credits........................................... ...................6
References........................................ ...................7
About Secunia........................................... .............8
Verification...................................... ...................9
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1) Affected Software
ZipGenius Version 5.5.1.468 and 6.0.2.1041.
Prior versions may also be affected.
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2) Severity
Rating: Moderately Critical
Impact: System access
Where: Remote
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3) Description of Vulnerability
Secunia Research has discovered some vulnerabilities in ZipGenius,
which can be exploited by malicious people to compromise a user's
system.
1) A boundary error exists in "zipgenius.exe", "zg.exe", "zgtips.dll",
and "contmenu.dll" when reading the filename of a compressed file
from a ZIP archive. This can be exploited to cause a stack-based
buffer overflow when a malicious archive containing a file with an
overly long filename is read either in ZipGenius or from Windows
Explorer.
2) A boundary error exists in "zipgenius.exe" when handling the
original name of a UUE/XXE/MIM encoded file. This can be exploited
to cause a stack-based buffer overflow when a malicious UUE/XXE/MIM
archive containing an encoded file with an overly long filename is
opened.
3) A boundary error exists in "unacev2.dll" when extracting an ACE
archive containing a file with an overly long filename. This can be
exploited to cause a stack-based buffer overflow when a malicious
ACE archive is extracted using "zipgenius.exe" or "zg.exe".
Vulnerability #3 is related to:
SA14359
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4) Solution
Update to version 6.0.2.1050.
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5) Time Table
04/10/2005 - Initial vendor notification.
05/10/2005 - Initial vendor reply.
20/10/2005 - Vendor released fixed version.
21/10/2005 - Public disclosure.
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6) Credits
Discovered by Tan Chew Keong, Secunia Research.
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7) References
ZipGenius:
http://forum.zipgenius.it/index.php?showtopic=684
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8) About Secunia
Secunia collects, validates, assesses, and writes advisories regarding
all the latest software vulnerabilities disclosed to the public. These
advisories are gathered in a publicly available database at the
Secunia website:
http://secunia.com/
Secunia offers services to our customers enabling them to receive all
relevant vulnerability information to their specific system
configuration.
Secunia offers a FREE mailing list called Secunia Security Advisories:
http://secunia.com/secunia_security_advisories/
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9) Verification
Please verify this advisory by visiting the Secunia website:
http://secunia.com/secunia_research/2005-54/advisory/
Complete list of vulnerability reports published by Secunia Research:
http://secunia.com/secunia_research/
================================================== ====================
Secunia Research 21/10/2005
- ZipGenius Multiple Archive Handling Buffer Overflow -
================================================== ====================
Table of Contents
Affected Software.......................................... ..........1
Severity.......................................... ...................2
Description of Vulnerability..................................... ....3
Solution.......................................... ...................4
Time Table............................................. ..............5
Credits........................................... ...................6
References........................................ ...................7
About Secunia........................................... .............8
Verification...................................... ...................9
================================================== ====================
1) Affected Software
ZipGenius Version 5.5.1.468 and 6.0.2.1041.
Prior versions may also be affected.
================================================== ====================
2) Severity
Rating: Moderately Critical
Impact: System access
Where: Remote
================================================== ====================
3) Description of Vulnerability
Secunia Research has discovered some vulnerabilities in ZipGenius,
which can be exploited by malicious people to compromise a user's
system.
1) A boundary error exists in "zipgenius.exe", "zg.exe", "zgtips.dll",
and "contmenu.dll" when reading the filename of a compressed file
from a ZIP archive. This can be exploited to cause a stack-based
buffer overflow when a malicious archive containing a file with an
overly long filename is read either in ZipGenius or from Windows
Explorer.
2) A boundary error exists in "zipgenius.exe" when handling the
original name of a UUE/XXE/MIM encoded file. This can be exploited
to cause a stack-based buffer overflow when a malicious UUE/XXE/MIM
archive containing an encoded file with an overly long filename is
opened.
3) A boundary error exists in "unacev2.dll" when extracting an ACE
archive containing a file with an overly long filename. This can be
exploited to cause a stack-based buffer overflow when a malicious
ACE archive is extracted using "zipgenius.exe" or "zg.exe".
Vulnerability #3 is related to:
SA14359
================================================== ====================
4) Solution
Update to version 6.0.2.1050.
================================================== ====================
5) Time Table
04/10/2005 - Initial vendor notification.
05/10/2005 - Initial vendor reply.
20/10/2005 - Vendor released fixed version.
21/10/2005 - Public disclosure.
================================================== ====================
6) Credits
Discovered by Tan Chew Keong, Secunia Research.
================================================== ====================
7) References
ZipGenius:
http://forum.zipgenius.it/index.php?showtopic=684
================================================== ====================
8) About Secunia
Secunia collects, validates, assesses, and writes advisories regarding
all the latest software vulnerabilities disclosed to the public. These
advisories are gathered in a publicly available database at the
Secunia website:
http://secunia.com/
Secunia offers services to our customers enabling them to receive all
relevant vulnerability information to their specific system
configuration.
Secunia offers a FREE mailing list called Secunia Security Advisories:
http://secunia.com/secunia_security_advisories/
================================================== ====================
9) Verification
Please verify this advisory by visiting the Secunia website:
http://secunia.com/secunia_research/2005-54/advisory/
Complete list of vulnerability reports published by Secunia Research:
http://secunia.com/secunia_research/
================================================== ====================