OpenSSL 1.0.0 < 1.0.0t Multiple DoS

Medium Nessus Plugin ID 87220


The remote host is affected by multiple denial of service vulnerabilities.


According to its banner, the remote host is running a version of OpenSSL 1.0.0 prior to 1.0.0t. It is, therefore, affected by the following vulnerabilities :

- A flaw exists in the ASN1_TFLG_COMBINE implementation in file tasn_dec.c related to handling malformed X509_ATTRIBUTE structures. A remote attacker can exploit this to cause a memory leak by triggering a decoding failure in a PKCS#7 or CMS application, resulting in a denial of service. (CVE-2015-3195)

- A race condition exists in s3_clnt.c that is triggered when PSK identity hints are incorrectly updated in the parent SSL_CTX structure when they are received by a multi-threaded client. A remote attacker can exploit this, via a crafted ServerKeyExchange message, to cause a double-free memory error, resulting in a denial of service. (CVE-2015-3196)


Upgrade to OpenSSL version 1.0.0t or later.

See Also

Plugin Details

Severity: Medium

ID: 87220

File Name: openssl_1_0_0t.nasl

Version: $Revision: 1.12 $

Type: remote

Family: Web Servers

Published: 2015/12/07

Modified: 2017/07/20

Dependencies: 57323

Risk Information

Risk Factor: Medium


Base Score: 5

Temporal Score: 3.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

Vulnerability Information

CPE: cpe:/a:openssl:openssl

Required KB Items: openssl/port

Exploit Available: false

Exploit Ease: No known exploits are available

Patch Publication Date: 2015/12/03

Vulnerability Publication Date: 2015/12/03

Reference Information

CVE: CVE-2015-3195, CVE-2015-3196

BID: 78622, 78626

OSVDB: 131039, 131040