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yaSSL Multiple Vulnerabilities

Secunia Advisory:

SA28324

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Release Date:

2008-01-07

Last Update:

2008-01-29

Popularity:

6,994 views

Critical:

Highly critical

Impact:

DoS
System access

Where:

From remote

Solution Status:

Unpatched

Software:

yaSSL Library 1.x

Binary Analysis:

BA340 :: Available for 1 Credit

BA345 :: Available for 1 Credit

Secunia CVSS-2 Score:

Available in Secunia business solutions

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Advisory Content (Page 1 of 3)

[ 1 ] [ 2 ] [ 3 ]

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Description:
Luigi Auriemma has discovered some vulnerabilities in yaSSL, which can be exploited by malicious people to cause a DoS (Denial of Service) and to compromise an application using the library.

1) A boundary error exists within the "ProcessOldClientHello()" method in src/handshake.cpp. This can be exploited to cause a stack-based buffer overflow via a specially crafted SSL version 2 "Hello" packet.

Successful exploitation allows execution of arbitrary code.

2) A boundary error exists within the implementation of the input operator for SSL "Hello" packets in src/yassl_imp.cpp. This can be exploited to cause a buffer overflow via a specially crafted SSL version 3 "Hello" packet.

Successful exploitation may allow execution of arbitrary code.

3) A boundary error exists within the "HASHwithTransform::Update()" method in taocrypt/src/hash.cpp. This can be exploited to trigger an out-of-bounds read and crash an affected application via a specially crafted SSL "Hello" packet.

The vulnerabilities are confirmed in version 1.7.5. Other versions may also be affected.

Change Page:
[ 1 ] [ 2 ] [ 3 ]

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