发布时间 :2003-06-16 00:00:00
修订时间 :2016-10-17 22:33:03

[原文]Signed integer vulnerability in libnasl in Nessus before 2.0.6 allows local users with plugin upload privileges to cause a denial of service (core dump) and possibly execute arbitrary code by causing a negative argument to be provided to the insstr function as used in a NASL script.

[CNNVD]Nessus LibNASL任意代码执行漏洞(CNNVD-200306-094)

        Nessus 2.0.6之前版本libnasl存在签名整数漏洞。具有插件上传特权的本地用户通过引起提供给如用在NASL脚本中insstr函数的负参数导致服务拒绝(内存转储)并可能执行任意代码。

- CVSS (基础分值)

CVSS分值: 4.6 [中等(MEDIUM)]
机密性影响: PARTIAL [很可能造成信息泄露]
完整性影响: PARTIAL [可能会导致系统文件被修改]
可用性影响: PARTIAL [可能会导致性能下降或中断资源访问]
攻击复杂度: LOW [漏洞利用没有访问限制 ]
攻击向量: LOCAL [漏洞利用需要具有物理访问权限或本地帐户]
身份认证: NONE [漏洞利用无需身份认证]

- CWE (弱点类目)

CWE-189 [数值错误]

- CPE (受影响的平台与产品)


- OVAL (用于检测的技术细节)


- 官方数据库链接
(官方数据源) MITRE
(官方数据源) NVD
(官方数据源) CNNVD

- 其它链接及资源
(UNKNOWN)  BUGTRAQ  20030522 Potential security vulnerability in Nessus
(UNKNOWN)  BUGTRAQ  20030523 nessus NASL scripting engine security issues
(UNKNOWN)  BID  7664

- 漏洞信息

Nessus LibNASL任意代码执行漏洞
中危 输入验证
2003-06-16 00:00:00 2007-03-30 00:00:00
        Nessus 2.0.6之前版本libnasl存在签名整数漏洞。具有插件上传特权的本地用户通过引起提供给如用在NASL脚本中insstr函数的负参数导致服务拒绝(内存转储)并可能执行任意代码。

- 公告与补丁

        This issue has been addressed in Nessus 2.0.6. Users are advised to upgrade as soon as possible.
        Gentoo has released advisory 200305-10. Vulnerable users are advised to perform the following commands:
        emerge sync
        emerge nessus
        emerge clean
        Nessus Nessus 2.0
        Nessus Nessus 2.0.1
        Nessus Nessus 2.0.2
        Nessus Nessus 2.0.3
        Nessus Nessus 2.0.4
        Nessus Nessus 2.0.5

- 漏洞信息 (22634)

Nessus 2.0.x LibNASL Arbitrary Code Execution Vulnerability (EDBID:22634)
multiple dos
2003-05-22 Verified
0 Sir Mordred
N/A [点击下载]

Nessus has reported that various flaws have been discovered in the 'libnasl' library used by the Nessus application. As a result, a malicious NASL script may be able to break outside of the established sandbox environment and execute arbitrary commands on the local system.

Note that this malicious script must be a legitimate plugin that has been uploaded to the Nessus server. Furthermore, the affected Nessus application must have enabled the 'plugins_upload' option (which is disabled by default).

insstr("aaaaaaaaaaa", "bb", 3, 0xfffffffd);
scanner_add_port(port : 80, proto : crap(data:'A', length:300));
ftp_log_in (socket : open_sock_tcp(21), pass : "11", user:crap (data:'A',length:8192) ); 		

- 漏洞信息

Nessus libnasl insstr Function Local DoS
Local Access Required Denial of Service
Loss of Availability Upgrade
Vendor Verified

- 漏洞描述

Nessus contains a flaw that allows a local user to create a denial of service to the scanner. The condition is due to a flaw in the Nessus Attack Scripting Language (NASL) engine when the "plugins_upload" option is enabled. A local attacker can provide malicious content to the insstr() function and cause the NASL to crash.

- 时间线

2003-05-23 Unknow
Unknow Unknow

- 解决方案

Upgrade to version 2.0.6 or higher, as it has been reported to fix this vulnerability. An upgrade is required as there are no known workarounds.

- 相关参考

- 漏洞作者

Unknown or Incomplete