Vulnerabilities > CVE-2013-5515 - Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in Cisco Adaptive Security Appliance Software
Attack vector
UNKNOWN Attack complexity
UNKNOWN Privileges required
UNKNOWN Confidentiality impact
UNKNOWN Integrity impact
UNKNOWN Availability impact
UNKNOWN Summary
The Clientless SSL VPN feature in Cisco Adaptive Security Appliance (ASA) Software 8.x before 8.2(5.44), 8.3.x before 8.3(2.39), 8.4.x before 8.4(5.7), 8.6.x before 8.6(1.12), 9.0.x before 9.0(2.6), and 9.1.x before 9.1(1.7) allows remote attackers to cause a denial of service (device reload) via crafted HTTPS requests, aka Bug ID CSCua22709.
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 | CISCO |
| NASL id | CISCO-SA-20131009-ASA.NASL |
| description | The remote Cisco ASA device is affected by one or more of the following vulnerabilities : - A denial of service vulnerability exists due to improper clearing of unused memory blocks after an AnyConnect SSL VPN client disconnects. (CVE-2013-3415) - A denial of service vulnerability exists resulting from an error in the code that decrypts packets transiting an active VPN tunnel. (CVE-2013-5507) - A denial of service vulnerability exists due to improper handling of segmented Transparent Network Substrate (TNS) packets. (CVE-2013-5508) - An authentication bypass vulnerability exists resulting due to an error in handling a client crafted certificate during the authentication phase. (CVE-2013-5509) - An authentication bypass vulnerability exists due to improper parsing of the LDAP response packet received from a remote AAA LDAP server. (CVE-2013-5510) - An authentication bypass vulnerability exists due to an error in the implementation of the authentication-certificate option. (CVE-2013-5511) - A denial of service vulnerability exists due to improper handling of a race condition during inspection of HTTP packets by the HTTP DPI engine. (CVE-2013-5512) - A denial of service vulnerability exists due to the improper processing of unsupported DNS over TCP packets by the DNS inspection engine. (CVE-2013-5513) - A denial of service vulnerability exists resulting from the improper handling of crafted HTTPS requests for systems configured for Clientless SSL VPN. (CVE-2013-5515) - A denial of service condition can be caused by improper handling of crafted ICMP packets. (CVE-2013-5542) Note that the verification checks for the presence of CVE-2013-5513 and CVE-2013-5515 are best effort approaches and may result in potential false positives. |
| last seen | 2019-10-28 |
| modified | 2013-10-17 |
| plugin id | 70474 |
| published | 2013-10-17 |
| reporter | This script is Copyright (C) 2013-2018 Tenable Network Security, Inc. |
| source | https://www.tenable.com/plugins/nessus/70474 |
| title | Cisco ASA Software Multiple Vulnerabilities (cisco-sa-20131009-asa) |