Cisco AnyConnect Secure Mobility Client < 3.1(7021) / <= 4.0(48) Multiple Vulnerabilities (FREAK)

medium Nessus Plugin ID 82270

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Synopsis

The remote host is affected by multiple vulnerabilities.

Description

The remote host has a version of Cisco AnyConnect Secure Mobility Client installed that is prior to 3.1.7021.0, or else it is a version equal or prior to 4.0.0048.0. It is, therefore, affected by multiple vulnerabilities in the OpenSSL library :

- The BIGNUM squaring (BN_sqr) implementation does not properly calculate the square of a BIGNUM value. This allows remote attackers to defeat cryptographic protection mechanisms. (CVE-2014-3570)

- A NULL pointer dereference flaw exists with dtls1_get_record when handling DTLS messages. A remote attacker, using a specially crafted DTLS message, can cause a denial of service. (CVE-2014-3571)

- A flaw exists when accepting non-DER variations of certificate signature algorithms and signature encodings due to a lack of enforcement of matches between signed and unsigned portions. A remote attacker, by including crafted data within a certificate's unsigned portion, can bypass fingerprint-based certificate-blacklist protection mechanisms. (CVE-2014-8275)

- A security feature bypass vulnerability, known as FREAK (Factoring attack on RSA-EXPORT Keys), exists due to the support of weak EXPORT_RSA cipher suites with keys less than or equal to 512 bits. A man-in-the-middle attacker may be able to downgrade the SSL/TLS connection to use EXPORT_RSA cipher suites which can be factored in a short amount of time, allowing the attacker to intercept and decrypt the traffic. (CVE-2015-0204)

- A memory leak occurs in dtls1_buffer_record when handling a saturation of DTLS records containing the same number sequence but for the next epoch. This allows a remote attacker to cause a denial of service.
(CVE-2015-0206)

Solution

Upgrade to Cisco AnyConnect Secure Mobility Client 3.1(7021) or later, or refer to the vendor.

Plugin Details

Severity: Medium

ID: 82270

File Name: cisco_anyconnect_3_1_7021.nasl

Version: 1.8

Type: local

Agent: windows

Family: Windows

Published: 3/26/2015

Updated: 11/22/2019

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.2

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2014-8275

Vulnerability Information

CPE: cpe:/a:cisco:anyconnect_secure_mobility_client

Required KB Items: installed_sw/Cisco AnyConnect Secure Mobility Client, SMB/Registry/Enumerated

Exploit Ease: No known exploits are available

Patch Publication Date: 3/12/2015

Vulnerability Publication Date: 1/5/2015

Reference Information

CVE: CVE-2014-3570, CVE-2014-3571, CVE-2014-8275, CVE-2015-0204, CVE-2015-0206

BID: 71935, 71936, 71937, 71939, 71940

CERT: 243585

CISCO-BUG-ID: CSCus42726

Detections

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