|
OpenSSL Spoofing and Denial of Service Vulnerabilities
|
|
Secunia Advisory:
|
SA33338
|
|
|
Release Date:
|
2009-01-07
|
|
Last Update:
|
2009-06-05
|
|
Popularity:
|
4,425 views
|
|
|
Critical:
|
 Moderately critical
|
|
Impact:
|
Spoofing DoS
|
|
Where:
|
From remote
|
|
Solution Status:
|
Vendor Patch
|
|
| Software: | OpenSSL 0.9.x
|
|
|
Secunia CVSS-2 Score:
|
Available in Secunia business solutions
|
|
|
Subscribe:
|
Instant alerts on relevant vulnerabilities
|
|
| Advisory Content (Page 1 of 3) | [ 1 ] [ 2 ] [ 3 ] | |
|
Description: Two vulnerabilities have been reported in OpenSSL, which can be exploited by malicious people to conduct spoofing attacks or cause a DoS (Denial of Service).
1) Certain OpenSSL functions fail to correctly verify the return value of the "EVP_VerifyFinal()" function when validating the signature of DSA and ECDSA keys. This can be exploited to bypass the signature check by e.g. sending a specially crafted signature of a certificate chain to a client.
Successful exploitation requires that the server uses a certificate containing a DSA or ECDSA key.
The vulnerability is reported in versions prior to 0.9.8j.
2) An error in the DTLS implementation can be exploited to crash a DTLS server via a "ChangeCipherSpec" record sent before "ClientHello".
The vulnerability is reported in versions prior to 0.9.8i.
Change Page: [ 1 ] [ 2 ] [ 3 ]
|
|
|
Track this Secunia Advisory
|
Customers of the Secunia Vulnerability Intelligence solutions will automatically receive updates when new information regarding this advisory is released.
Read more about our Vulnerability Intelligence solutions and what they can do for you and your company.
|
|
|
About this Secunia Advisory
|
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.
|