Detections
Analytics
Blue Coat ProxySG 6.5.x < 6.5.9.8 / 6.6.x < 6.6.4.1 Multiple OpenSSL Vulnerabilities
critical Nessus Plugin ID 93381
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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)
Solution
Upgrade to Blue Coat SGOS version 6.5.9.8 / 6.6.4.1 or later.See Also
Plugin Details
Severity: Critical
ID: 93381
File Name: bluecoat_proxy_sg_6_5_9_8.nasl
Version: 1.7
Type: local
Family: Firewalls
Published: 9/8/2016
Updated: 6/29/2018
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 6.7
CVSS v2
Risk Factor: Critical
Base Score: 10
Temporal Score: 7.8
Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C
CVSS v3
Risk Factor: Critical
Base Score: 9.8
Temporal Score: 8.8
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C
Vulnerability Information
CPE: cpe:/o:bluecoat:sgos
Required KB Items: Host/BlueCoat/ProxySG/Version
Exploit Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 6/11/2016
Vulnerability Publication Date: 4/22/2016