Blue Coat ProxyAV 3.5.x < 3.5.4.1 Multiple DoS Vulnerabilities

medium Nessus Plugin ID 93410
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VPR Score: 3.6

Synopsis

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

Description

According to its self-reported version number, the Blue Coat ProxyAV firmware installed on the remote device is 3.5.x prior to 3.5.4.1. It is, therefore, affected by the following vulnerabilities in the bundled version of OpenSSL :

- A NULL pointer dereference flaw exists in file rsa_ameth.c due to improper handling of ASN.1 signatures that are missing the PSS parameter. A remote attacker can exploit this to cause the signature verification routine to crash, resulting in a denial of service condition. (CVE-2015-3194)

- 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)

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

Solution

Upgrade to Blue Coat ProxyAV version 3.5.4.1 or later.

See Also

https://bto.bluecoat.com/security-advisory/sa105

Plugin Details

Severity: Medium

ID: 93410

File Name: bluecoat_proxy_av_3_5_4_1.nasl

Version: 1.7

Type: remote

Family: CGI abuses

Published: 9/9/2016

Updated: 11/14/2019

Dependencies: bluecoat_proxy_av_version.nasl

Risk Information

Risk Factor: Medium

VPR Score: 3.6

CVSS Score Source: CVE-2015-3195

CVSS v2.0

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

CVSS v3.0

Base Score: 5.3

Temporal Score: 4.6

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:2.3:h:bluecoat:proxyav:*:*:*:*:*:*:*:*

Required KB Items: www/bluecoat_proxyav

Exploit Ease: No known exploits are available

Patch Publication Date: 1/19/2016

Vulnerability Publication Date: 12/3/2015

Reference Information

CVE: CVE-2015-3194, CVE-2015-3195

BID: 78623, 78626

IAVA: 2016-A-0229