Detections
Analytics
OpenSSL < 0.9.8h Multiple Vulnerabilities
medium Nessus Plugin ID 56996
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Synopsis
The remote web server has multiple SSL-related vulnerabilities.Description
According to its banner, the remote web server uses a version of OpenSSL older than 0.9.8h. As such, it may be affected by the following vulnerabilities :- A double-free error exists related to the handling of server name extension data and specially crafted TLS 1.0 'Client Hello' packets. This can cause application crashes. Note that successful exploitation requires that OpenSSL is compiled with the TLS server name extensions.
(CVE-2008-0891)
- A NULL pointer dereference error exists related to anonymous Diffie-Hellman key exchange and TLS handshakes. This can be exploited by omitting the 'Server Key exchange message' from the handshake and can cause application crashes. (CVE-2008-1672)
- On 32-bit builds, an information disclosure vulnerability exists during certain calculations for NIST elliptic curves P-256 or P-384. This error can allow an attacker to recover the private key of the TLS server.
The following are required for exploitation :
- 32-bit build
- Use of elliptic curves P-256 and/or P-384
- Either the use of ECDH family ciphers and/or the use of ECDHE family ciphers without the SSL_OP_SINGLE_ECDH_USE context option
(CVE-2011-4354)
Note that Nessus has not attempted to verify that these issues are actually exploitable or have been patched but instead has relied on the version number found in the Server response header.
Solution
Upgrade to OpenSSL 0.9.8h or later or apply the vendor-supplied patches.See Also
Plugin Details
Severity: Medium
ID: 56996
File Name: openssl_0_9_8h.nasl
Version: 1.14
Type: combined
Agent: windows, macosx, unix
Family: Web Servers
Published: 12/2/2011
Updated: 8/22/2023
Supported Sensors: Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 4.2
CVSS v2
Risk Factor: Medium
Base Score: 5.8
Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:N
CVSS Score Source: CVE-2011-4354
Vulnerability Information
CPE: cpe:/a:openssl:openssl
Required KB Items: installed_sw/OpenSSL
Exploit Ease: No known exploits are available
Patch Publication Date: 5/28/2008
Vulnerability Publication Date: 5/28/2008