Blue Coat ProxySG 6.5.x < 6.5.9.8 / 6.6.x < 6.6.4.1 Multiple OpenSSL Vulnerabilities

This script is Copyright (C) 2016 Tenable Network Security, Inc.


Synopsis :

The remote device is affected by multiple vulnerabilities.

Description :

The self-reported SGOS version installed on the remote Blue Coat
ProxySG device is 6.5.x prior to 6.5.9.8 or 6.6.x prior to 6.6.4.1. It
is, therefore, affected by multiple vulnerabilities in its bundled
version of OpenSSL :

- Multiple flaws exist in the aesni_cbc_hmac_sha1_cipher()
function in file crypto/evp/e_aes_cbc_hmac_sha1.c and
the aesni_cbc_hmac_sha256_cipher() function in file
crypto/evp/e_aes_cbc_hmac_sha256.c that are triggered
when the connection uses an AES-CBC cipher and AES-NI
is supported by the server. A man-in-the-middle attacker
can exploit these to conduct a padding oracle attack,
resulting in the ability to decrypt the network traffic.
Note that this issue does not affect the SG300 and SG600
hardware platforms. (CVE-2016-2107)

- A remote code execution vulnerability exists in the
ASN.1 encoder due to an underflow condition that occurs
when attempting to encode the value zero represented as
a negative integer. An unauthenticated, remote attacker
can exploit this to corrupt memory, resulting in the
execution of arbitrary code. (CVE-2016-2108)

- Multiple unspecified flaws exist in the d2i BIO
functions when reading ASN.1 data from a BIO due to
invalid encoding causing a large allocation of memory.
An unauthenticated, remote attacker can exploit these to
cause a denial of service condition through resource
exhaustion. Note that this issue only affects management
connections. (CVE-2016-2109)

See also :

https://bto.bluecoat.com/security-advisory/sa123

Solution :

Upgrade to Blue Coat SGOS version 6.5.9.8 / 6.6.4.1 or later.

Risk factor :

Critical / CVSS Base Score : 10.0
(CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C)
CVSS Temporal Score : 7.8
(CVSS2#E:POC/RL:OF/RC:C)
Public Exploit Available : true

Family: Firewalls

Nessus Plugin ID: 93381 ()

Bugtraq ID: 87940
89752
89760

CVE ID: CVE-2016-2107
CVE-2016-2108
CVE-2016-2109

Ready to Amp Up Your Nessus Experience?

Get Nessus Professional to scan unlimited IPs, run compliance checks & more

Buy Nessus Professional Now