Vulnerabilities > CVE-2013-5559 - Improper Restriction of Operations Within the Bounds of A Memory Buffer vulnerability in Cisco Anyconnect Secure Mobility Client
Attack vector
NETWORK Attack complexity
MEDIUM Privileges required
NONE Confidentiality impact
PARTIAL Integrity impact
PARTIAL Availability impact
PARTIAL Summary
Buffer overflow in the Active Template Library (ATL) framework in the VPNAPI COM module in Cisco AnyConnect Secure Mobility Client 2.x allows user-assisted remote attackers to execute arbitrary code via a crafted HTML document, aka Bug ID CSCuj58139.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Buffer Overflow via Environment Variables This attack pattern involves causing a buffer overflow through manipulation of environment variables. Once the attacker finds that they can modify an environment variable, they may try to overflow associated buffers. This attack leverages implicit trust often placed in environment variables.
- Overflow Buffers Buffer Overflow attacks target improper or missing bounds checking on buffer operations, typically triggered by input injected by an attacker. As a consequence, an attacker is able to write past the boundaries of allocated buffer regions in memory, causing a program crash or potentially redirection of execution as per the attackers' choice.
- Client-side Injection-induced Buffer Overflow This type of attack exploits a buffer overflow vulnerability in targeted client software through injection of malicious content from a custom-built hostile service.
- Filter Failure through Buffer Overflow In this attack, the idea is to cause an active filter to fail by causing an oversized transaction. An attacker may try to feed overly long input strings to the program in an attempt to overwhelm the filter (by causing a buffer overflow) and hoping that the filter does not fail securely (i.e. the user input is let into the system unfiltered).
- MIME Conversion An attacker exploits a weakness in the MIME conversion routine to cause a buffer overflow and gain control over the mail server machine. The MIME system is designed to allow various different information formats to be interpreted and sent via e-mail. Attack points exist when data are converted to MIME compatible format and back.
Nessus
NASL family Windows NASL id CISCO_ANYCONNECT_3_0_629.NASL description The remote host has a version of Cisco AnyConnect 2.x or 3.x prior to 3.1(629). As such, when the VPNAPI COM module calls the ATL framework, certain input data are not properly validated and could allow a buffer overflow. This error could lead to arbitrary code execution. last seen 2020-06-01 modified 2020-06-02 plugin id 71464 published 2013-12-16 reporter This script is Copyright (C) 2013-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/71464 title Cisco AnyConnect Secure Mobility Client 2.x / 3.x < 3.0(629) ATL Buffer Overflow NASL family MacOS X Local Security Checks NASL id MACOSX_CISCO_ANYCONNECT_3_0_629.NASL description The remote host has a version of Cisco AnyConnect 2.x or 3.x prior to 3.0(629) and is, therefore, affected by the following vulnerabilities : - When the client is obtained from the VPN headend using a web browser, a helper application performs the download and installation. This helper application does not verify the authenticity of the downloaded installer, which could allow an attacker to send malicious code to the user instead. Note 2.x versions prior to 2.5.3041 are affected by this vulnerability. (CVE-2011-2040) - When the VPNAPI COM module calls the ATL framework, certain input data are not properly validated. This could allow a buffer overflow, which could lead to arbitrary code execution. (CVE-2013-5559) last seen 2020-06-01 modified 2020-06-02 plugin id 71465 published 2013-12-16 reporter This script is Copyright (C) 2013-2018 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/71465 title Mac OS X : Cisco AnyConnect Secure Mobility Client 2.x / 3.x < 3.0(629) Multiple Vulnerabilities