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OpenSSH "buffer_append_space()" Buffer Management Vulnerability
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Secunia Advisory:
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SA9743
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Release Date:
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2003-09-16
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Last Update:
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2003-09-17
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Popularity:
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17,229 views
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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: | OpenSSH 3.x
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Secunia CVSS-2 Score:
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| Advisory Content (Page 1 of 3) | [ 1 ] [ 2 ] [ 3 ] | |
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Description:
A vulnerability has been reported in OpenSSH, which potentially can be exploited by malicious people to cause a DoS (Denial of Service) or compromise a vulnerable system.
The vulnerability is caused due to a buffer management error in the "buffer_append_space()" function. When OpenSSH receives a packet that is larger than the remaining free space and fails the range check when trying to reallocate a larger buffer, the "fatal()" function is called.
In some circumstances the function may attempt to free memory outside the allocated buffer, which leads to heap corruption. However, it is currently not fully known whether the vulnerability is exploitable or not.
All versions prior to 3.7.1 are vulnerable.
NOTE: This advisory will be updated when more information is available.
Change Page:
[ 1 ] [ 2 ] [ 3 ]
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About this Secunia Advisory
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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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