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SILC "silc_pkcs1_decode" Integer Overflow Vulnerability
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Secunia Advisory:
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SA29463
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Release Date:
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2008-03-26
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Last Update:
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2008-04-01
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Critical:
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Highly critical
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Impact:
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DoS
System access
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Where:
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From remote
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Solution Status:
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Vendor Patch
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| Software: | SILC Secure Internet Live Conferencing Client 1.x
SILC Secure Internet Live Conferencing Server 1.x
SILC Secure Internet Live Conferencing Toolkit 1.x
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| | CVE reference: | CVE-2008-1552 (Secunia mirror)
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Description:
A vulnerability has been reported in SILC Client, Server, and Toolkit, which can be exploited by malicious people to cause a DoS (Denial of Service) and potentially compromise a vulnerable system.
The vulnerability is caused due to an integer overflow error in the "silc_pkcs1_decode" function in lib/silccrypt/silcpkcs1.c. This can be exploited to cause a buffer overflow via a specially crafted PKCS#1 block.
The vulnerability is reported in SILC Toolkit prior to 1.1.7, SILC Client prior to 1.1.4, and SILC Server prior to 1.1.2.
Solution:
SILC Toolkit:
Update to version 1.1.7.
http://silcnet.org/software/download/toolkit/
SILC Client:
Update to version 1.1.4.
http://silcnet.org/software/download/client/
SILC Server:
Update to version 1.1.2.
http://silcnet.org/software/download/server/
Provided and/or discovered by:
Ariel Waissbein, Pedro Varangot, Martin Mizrahi, Oren Isacson, Carlos Garcia, and Ivan Arce of Core Security Technologies.
Changelog:
2008-04-01: Added CVE reference.
Original Advisory:
SILC:
http://silcnet.org/general/news/?item=toolkit_20080320_1
http://silcnet.org/general/news/?item=client_20080320_1
http://silcnet.org/general/news/?item=server_20080320_1
Core Security:
http://www.coresecurity.com/?action=item&id=2206
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.
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5 Related Secunia Security Advisories
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1. SILC Server "NEW_CLIENT" Packet Denial of Service
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2. SILC Toolkit "silc_fingerprint()" Buffer Overflow Vulnerability
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3. SILC Client and SILC Toolkit "NICK_CHANGE" Buffer Overflow
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4. SILC Server Invalid hmac/cipher Denial of Service
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5. SILC Server and Toolkit Insecure Temporary File Creation
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