Vulnerabilities > CVE-2011-4191 - Buffer Errors vulnerability in Novell Netware 6.5
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
PARTIAL Integrity impact
PARTIAL Availability impact
PARTIAL Summary
Stack-based buffer overflow in the xdrDecodeString function in XNFS.NLM in Novell NetWare 6.5 SP8 allows remote attackers to execute arbitrary code or cause a denial of service (abend or NFS outage) via long packets.
Vulnerable Configurations
| Part | Description | Count |
|---|---|---|
| OS | 1 |
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.
Exploit-Db
description Novell Netware XNFS caller_name xdrDecodeString Remote Code Execution. CVE-2011-4191. Dos exploit for netware platform id EDB-ID:18351 last seen 2016-02-02 modified 2012-01-10 published 2012-01-10 reporter Francis Provencher source https://www.exploit-db.com/download/18351/ title Novell Netware XNFS caller_name xdrDecodeString Remote Code Execution description Novell Netware XNFS.NLM NFS Rename Remote Code Execution. CVE-2011-4191. Dos exploit for netware platform id EDB-ID:18327 last seen 2016-02-02 modified 2012-01-06 published 2012-01-06 reporter Francis Provencher source https://www.exploit-db.com/download/18327/ title Novell Netware XNFS.NLM NFS Rename Remote Code Execution description Novell Netware XNFS.NLM STAT Notify Remote Code Execution. CVE-2011-4191. Dos exploit for netware platform id EDB-ID:18328 last seen 2016-02-02 modified 2012-01-06 published 2012-01-06 reporter Francis Provencher source https://www.exploit-db.com/download/18328/ title Novell Netware XNFS.NLM STAT Notify Remote Code Execution
Seebug
| bulletinFamily | exploit |
| description | BUGTRAQ ID: 50804 CVE ID: CVE-2011-4191 Novell Netware是一款商业性质的网络操作系统。 Novell Netware在处理某些NFS请求时，XNFS.NLM中的"xdrDecodeString()"函数在实现上存在错误，可被恶意用户通过发送特制的数据报造成栈缓冲区溢出，执行任意代码，控制受影响系统。 Novell Netware 6.5.0 SP8 厂商补丁： Novell ------ 目前厂商已经发布了升级补丁以修复这个安全问题，请到厂商的主页下载： http://support.novell.com/security-alerts |
| id | SSV:24252 |
| last seen | 2017-11-19 |
| modified | 2011-11-25 |
| published | 2011-11-25 |
| reporter | Root |
| title | Novell Netware "XNFS.NLM"组件"xdrDecodeString()"远程缓冲区溢出漏洞 |