The version of stunnel installed on the remote host is prior to version 5.12. It is, therefore, affected by the following vulnerabilities in the bundled OpenSSL library :

  - A flaw exists in the DTLSv1_listen() function due to     state information being preserved in the SSL object from     one invocation to the next. A remote attacker can     exploit this, via crafted DTLS traffic, to cause a     segmentation fault, resulting in a denial of service.
    (CVE-2015-0207)

  - A flaw exists in the rsa_item_verify() function due to     improper implementation of ASN.1 signature verification.
    A remote attacker can exploit this, via an ASN.1     signature using the RSA PSS algorithm and invalid     parameters, to cause a NULL pointer dereference,     resulting in a denial of service. (CVE-2015-0208)

  - A use-after-free error exists in the d2i_ECPrivateKey()     function due to improper processing of malformed EC     private key files during import. A remote attacker can     exploit this to dereference already freed memory,     resulting in a denial of service or other unspecified     impact. (CVE-2015-0209)

  - A flaw exists in the ssl3_client_hello() function due to     improper validation of a PRNG seed before proceeding     with a handshake, resulting in insufficient entropy and     predictable output. A man-in-the-middle attacker can     exploit this to defeat cryptographic protection     mechanisms via a brute-force attack, resulting in the     disclosure of sensitive information. (CVE-2015-0285)

  - An invalid read flaw exists in the ASN1_TYPE_cmp()     function due to improperly performed boolean-type     comparisons. A remote attacker can exploit this, via a     crafted X.509 certificate to an endpoint that uses the     certificate-verification feature, to cause an invalid     read operation, resulting in a denial of service.
    (CVE-2015-0286)

  - A flaw exists in the ASN1_item_ex_d2i() function due to     a failure to reinitialize 'CHOICE' and 'ADB' data     structures when reusing a structure in ASN.1 parsing. A     remote attacker can exploit this to cause an invalid     write operation and memory corruption, resulting in a     denial of service. (CVE-2015-0287)

  - A NULL pointer dereference flaw exists in the     X509_to_X509_REQ() function due to improper processing     of certificate keys. This allows a remote attacker, via     a crafted X.509 certificate, to cause a denial of     service. (CVE-2015-0288)

  - A NULL pointer dereference flaw exists in the PKCS#7     parsing code due to incorrect handling of missing outer     ContentInfo. This allows a remote attacker, using an     application that processes arbitrary PKCS#7 data and     providing malformed data with ASN.1 encoding, to cause     a denial of service. (CVE-2015-0289)

  - A flaw exists with the 'multiblock' feature in the     ssl3_write_bytes() function due to improper handling of     certain non-blocking I/O cases. This allows a remote     attacker to cause failed connections or a segmentation     fault, resulting in a denial of service. (CVE-2015-0290)

  - A NULL pointer dereference flaw exists when handling     clients attempting to renegotiate using an invalid     signature algorithm extension. A remote attacker can     exploit this to cause a denial of service.
    (CVE-2015-0291)

  - A flaw exists in servers that both support SSLv2 and     enable export cipher suites due to improper     implementation of SSLv2. A remote attacker can exploit     this, via a crafted CLIENT-MASTER-KEY message, to cause     a denial of service. (CVE-2015-0293)

  - A flaw exists in the ssl3_get_client_key_exchange()     function when client authentication and an ephemeral     Diffie-Hellman ciphersuite are enabled. A remote     attacker can exploit this, via a ClientKeyExchange     message with a length of zero, to cause a denial of     service. (CVE-2015-1787)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

OpenSSL before 0.9.8zf, 1.0.0r, or 1.0.1m are unpatched for the following vulnerabilities :

  - An invalid read flaw exists in the 'ASN1_TYPE_cmp()' function due to improperly performed boolean-type comparisons. A remote attacker can exploit this, via a crafted X.509 certificate to an endpoint that uses the certificate-verification feature, to cause an invalid read operation, resulting in a denial of service. (CVE-2015-0286)

  - A flaw exists in the 'ASN1_item_ex_d2i()' function due to a failure to reinitialize 'CHOICE' and 'ADB' data structures when reusing a structure in ASN.1 parsing. This allows a remote attacker to cause an invalid write operation and memory corruption, resulting in a denial of service. (CVE-2015-0287)

  - A NULL pointer dereference flaw exists in the PKCS#7 parsing code due to incorrect handling of missing outer 'ContentInfo'. This allows a remote attacker, using an application that processes arbitrary PKCS#7 data and providing malformed data with ASN.1 encoding, to cause a denial of service. (CVE-2015-0289)

  - A flaw exists in servers that both support SSLv2 and enable export cipher suites due to improper implementation of SSLv2. A remote attacker can exploit this, via a crafted CLIENT-MASTER-KEY message, to cause a denial of service. (CVE-2015-0293)

  - A NULL pointer dereference flaw exists in the 'X509_to_X509_REQ()' function due to improper processing of certificate keys. This allows a remote attacker, via a crafted X.509 certificate, to cause a denial of service. (CVE-2015-0288)

  - A use-after-free condition exists in the 'd2i_ECPrivateKey() function due to improper processing of malformed EC private key files during import. A remote attacker can exploit this to dereference or free already freed memory, resulting in a denial of service or other unspecified impact. (CVE-2015-0209)

The remote host is running a version of Mac OS X 10.10.x that is prior to version 10.10.4 and the following components contain vulnerabilities :

  - Admin Framework 
-  afpserver 
 - apache 
 - AppleFSCompression 
 - AppleGraphicsControl 
 - AppleThunderboltEDMService 
 - ATS 
 - Bluetooth 
 - Certificate Trust Policy 
 - CFNetwork HTTPAuthentication 
 - CoreText 
 - coreTLS 
 - DiskImages 
 - Display Drivers 
 - EFI 
 - FontParser 
 - Graphics Driver 
 - ImageIO 
 - Install Framework Legacy 
 - Intel Graphics Driver 
 - IOAcceleratorFamily 
 - IOFireWireFamily 
 - Kernel 
 - kext tools 
 - Mail 
 - ntfs 
 - ntp 
 - OpenSSL 
 - QuickTime 
 - Security 
 - Spotlight 
 - SQLite 
 - System Stats 
 - TrueTypeScaler 
 - zip

OpenSSL 1.0.2 prior to 1.0.2a are unpatched for the following vulnerabilities:

  - A flaw exists in the 'DTLSv1_listen()' function due to the state being preserved in the SSL object from one invocation to the next. A remote attacker can exploit this, via crafted DTLS traffic, to cause a segmentation fault, resulting in a denial of service. (CVE-2015-0207)

  - A flaw exists in the 'rsa_item_verify()' function due to improper implementation of ASN.1 signature verification. A remote attacker can exploit this, via an ASN.1 signature using the RSA PSS algorithm and invalid parameters, to cause a NULL pointer dereference, resulting in a denial of service. (CVE-2015-0208)

  - A use-after-free condition exists in the 'd2i_ECPrivateKey() function due to improper processing of malformed EC private key files during import. A remote attacker can exploit this to dereference or free already freed memory, resulting in a denial of service or other unspecified impact. (CVE-2015-0209)

  - A flaw exists in the 'ssl3_client_hello()' function due to improper validation of a PRNG seed before proceeding with a handshake, resulting in insufficient entropy and predictable output. This allows a man-in-the-middle attacker to defeat cryptographic protection mechanisms via a brute-force attack, resulting in the disclosure of sensitive information. (CVE-2015-0285)

  - An invalid read flaw exists in the 'ASN1_TYPE_cmp()' function due to improperly performed boolean-type comparisons. A remote attacker can exploit this, via a crafted X.509 certificate to an endpoint that uses the certificate-verification feature, to cause an invalid read operation, resulting in a denial of service. (CVE-2015-0286)

  - A flaw exists in the 'ASN1_item_ex_d2i()' function due to a failure to reinitialize 'CHOICE' and 'ADB' data structures when reusing a structure in ASN.1 parsing. This allows a remote attacker to cause an invalid write operation and memory corruption, resulting in a denial of service. (CVE-2015-0287)

  - A NULL pointer dereference flaw exists in the 'X509_to_X509_REQ()' function due to improper processing of certificate keys. This allows a remote attacker, via a crafted X.509 certificate, to cause a denial of service. (CVE-2015-0288)

  - A NULL pointer dereference flaw exists in the PKCS#7 parsing code due to incorrect handling of missing outer 'ContentInfo'. This allows a remote attacker, using an application that processes arbitrary PKCS#7 data and providing malformed data with ASN.1 encoding, to cause a denial of service. (CVE-2015-0289)

  - A flaw exists with the 'multiblock' feature in the 'ssl3_write_bytes()' function due to improper handling of certain non-blocking I/O cases. This allows a remote attacker to cause failed connections or a segmentation fault, resulting in a denial of service. (CVE-2015-0290)

  - A NULL pointer dereference flaw exists when handling clients attempting to renegotiate using an invalid signature algorithm extension. A remote attacker can exploit this to cause a denial of service. (CVE-2015-0291)

  - A flaw exists in servers that both support SSLv2 and enable export cipher suites due to improper implementation of SSLv2. A remote attacker can exploit this, via a crafted CLIENT-MASTER-KEY message, to cause a denial of service. (CVE-2015-0293)

  - A flaw exists in the 'ssl3_get_client_key_exchange()' function when client authentication and an ephemeral Diffie-Hellman ciphersuite are enabled. This allows a remote attacker, via a ClientKeyExchange message with a length of zero, to cause a denial of service. (CVE-2015-1787)

The remote host is running a version of OpenSSL which is potentially affected by the following vulnerabilities : 

  - A use-after-free condition exists in the d2i_ECPrivateKey() function due to improper processing of malformed EC private key files during import. A remote attacker can exploit this to dereference or free already freed memory, resulting in a denial of service or other unspecified impact. (CVE-2015-0209)

  - An invalid read flaw exists in the ASN1_TYPE_cmp() function due to improperly performed boolean-type comparisons. A remote attacker can exploit this, via a crafted X.509 certificate to an endpoint that uses the certificate-verification feature, to cause an invalid read operation, resulting in a denial of service. (CVE-2015-0286)

  - A flaw exists in the ASN1_item_ex_d2i() function due to a failure to reinitialize 'CHOICE' and 'ADB' data structures when reusing a structure in ASN.1 parsing.  This allows a remote attacker to cause an invalid write operation and memory corruption, resulting in a denial of service. (CVE-2015-0287)

  - A NULL pointer dereference flaw exists in the PKCS#7 parsing code due to incorrect handling of missing outer ContentInfo. This allows a remote attacker, using an application that processes arbitrary PKCS#7 data and providing malformed data with ASN.1 encoding, to cause a denial of service. (CVE-2015-0288)

  - The PKCS#7 implementation does not properly handle a lack of outer ContentInfo, which allows attackers to cause a denial of service by leveraging an application that processes arbitrary PKCS#7 data and providing malformed data with ASN.1 encoding. (CVE-2015-0289)

  - A flaw exists in servers that both support SSLv2 and enable export cipher suites due to improper implementation of SSLv2. A remote attacker can exploit this, via a crafted CLIENT-MASTER-KEY message, to cause a denial of service. (CVE-2015-0293)

Multiple Cisco products incorporate a version of the OpenSSL package affected by one or more vulnerabilities that could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition or corrupt portions of OpenSSL process memory.

This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.

ID	Name	Product	Family	Published	Updated	Severity
82077	stunnel < 5.12 OpenSSL Multiple Vulnerabilities	Nessus	Windows	3/25/2015	7/30/2018	medium
8662	OpenSSL 0.9.8 < 0.9.8zf / 1.0.0 < 1.0.0r / 1.0.1 < 1.0.1m Multiple Vulnerabilities	Nessus Network Monitor	Web Servers	3/27/2015	3/6/2019	medium
8801	Mac OS X < 10.10.4 Multiple Vulnerabilities	Nessus Network Monitor	Operating System Detection	10/12/2015	3/6/2019	critical
8661	OpenSSL 1.0.2 < 1.0.2a Multiple Vulnerabilities	Nessus Network Monitor	Web Servers	3/27/2015	3/6/2019	medium
801937	OpenSSL < 0.9.8zf / 1.0.0r / 1.0.1m / 1.0.2a Multiple Vulnerabilities	Log Correlation Engine	Web Servers	3/19/2015		medium
501779	Rockwell Automation Stratix OpenSSL Elliptic Curve d2i_ECPrivateKey Denial of Service (CVE-2015-0209)	Tenable OT Security	Tenable.ot	11/15/2023	1/17/2024	high

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