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SILC Server Invalid hmac/cipher Denial of Service
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Secunia Advisory:
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SA24431
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Release Date:
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2007-03-07
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Last Update:
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2007-03-14
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Critical:
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Moderately critical
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Impact:
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DoS
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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 Server 1.x
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| | CVE reference: | CVE-2007-1327 (Secunia mirror)
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Description:
Frank Benkstein has reported a vulnerability in SILC Server, which can be exploited by malicious people to cause a DoS (Denial of Service).
The vulnerability is caused due to a NULL-pointer dereference error within apps/silcd/command.c. This can be exploited to crash the service by connecting to the server, joining or creating a channel, and then specifying invalid hmac or cipher values.
The vulnerability is reported in version 1.02. Prior versions may also be affected.
Solution:
Update to version 1.03.
Provided and/or discovered by:
Frank Benkstein
Changelog:
2007-03-14: Added CVE reference.
Original Advisory:
SILC Project:
http://silcnet.org/general/news/?item=server_20070306_1
Full-Disclosure:
http://lists.grok.org.uk/pipermail/full-disclosure/2007-March/052804.html
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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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3 Related Secunia Security Advisories
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1. SILC "silc_pkcs1_decode" Integer Overflow Vulnerability
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2. SILC Server "NEW_CLIENT" Packet Denial of Service
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3. SILC Server and Toolkit Insecure Temporary File Creation
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