Vulnerabilities > CVE-2014-0777 - Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in Ioserver OPC Server and OPC Drivers
Attack vector
UNKNOWN Attack complexity
UNKNOWN Privileges required
UNKNOWN Confidentiality impact
UNKNOWN Integrity impact
UNKNOWN Availability impact
UNKNOWN Summary
The Modbus slave/outstation driver in the OPC Drivers 1.0.20 and earlier in IOServer OPC Server allows remote attackers to cause a denial of service (out-of-bounds read and daemon crash) via a crafted packet.
Vulnerable Configurations
| Part | Description | Count |
|---|---|---|
| Application | 2 |
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.
Seebug
| bulletinFamily | exploit |
| description | Bugtraq ID:66761 CVE ID:CVE-2014-0777 IOServer是运行在Windows上的工业控制软件，包含内置Web服务器以支持XML服务器功能。 OPC Drivers 1.0.20之前版本内的Modbus从站及分站驱动程序在实现上存在越界读漏洞，攻击者通过特制的数据包，利用此漏洞可造成拒绝服务。 0 ioserver ioserver <= 1.0.20 目前厂商已经发布了升级补丁以修复漏洞，请下载使用： http://www.ioserver.com/ |
| id | SSV:62165 |
| last seen | 2017-11-19 |
| modified | 2014-04-15 |
| published | 2014-04-15 |
| reporter | Root |
| title | IOServer越界读取漏洞 |