CVE-2000-0525
CVSS10.0
发布时间 :2000-06-08 00:00:00
修订时间 :2008-09-10 15:04:55
NMCO    

[原文]OpenSSH does not properly drop privileges when the UseLogin option is enabled, which allows local users to execute arbitrary commands by providing the command to the ssh daemon.


[CNNVD]OpenSSH UseLogin漏洞(CNNVD-200006-039)

        OpenSSH在用UseLogin选项启动时无法降低权限。本地用户通过向ssh守护程序提供命令可以执行任意命令。

- CVSS (基础分值)

CVSS分值: 10 [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: [--]
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:/a:openbsd:openssh:2.1OpenBSD OpenSSH 2.1
cpe:/a:openbsd:openssh:1.2.3OpenBSD OpenSSH 1.2.3
cpe:/a:openbsd:openssh:1.2OpenBSD OpenSSH 1.2

- 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-2000-0525
(官方数据源) MITRE
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2000-0525
(官方数据源) NVD
http://www.cnnvd.org.cn/vulnerability/show/cv_cnnvdid/CNNVD-200006-039
(官方数据源) CNNVD

- 其它链接及资源

http://xforce.iss.net/static/4646.php
(VENDOR_ADVISORY)  XF  openssh-uselogin-remote-exec
http://www.securityfocus.com/bid/1334
(UNKNOWN)  BID  1334
http://www.osvdb.org/341
(UNKNOWN)  OSVDB  341
http://www.openbsd.org/errata.html#uselogin
(UNKNOWN)  OPENBSD  20000606 The non-default UseLogin feature in /etc/sshd_config is broken and should not be used.
http://archives.neohapsis.com/archives/bugtraq/2000-06/0065.html
(UNKNOWN)  BUGTRAQ  20000609 OpenSSH's UseLogin option allows remote access with root privilege.

- 漏洞信息

OpenSSH UseLogin漏洞
危急 设计错误
2000-06-08 00:00:00 2006-09-05 00:00:00
本地  
        OpenSSH在用UseLogin选项启动时无法降低权限。本地用户通过向ssh守护程序提供命令可以执行任意命令。

- 公告与补丁

        OpenSSH 2.1.1 is fixed and is not vulnerable to this attack. It can be obtained at:
        http://www.openssh.com/ftp.html
        The following software distributions have released their respective patched packages at the locations below:
        RedHat Linux:
        ftp://ftp.redhat.de/pub/rh-addons/security/current
        Connectiva Linux:
        DIRECT DOWNLOAD LINKS TO UPDATED PACKAGES
        ftp://ftp.conectiva.com.br/pub/conectiva/atualizacoes/5.0/i386/openssh-2.1.1p1-1cl.i386.rpm
        ftp://ftp.conectiva.com.br/pub/conectiva/atualizacoes/5.0/i386/openssh-askpass-2.1.1p1-1cl.i386.rpm
        ftp://ftp.conectiva.com.br/pub/conectiva/atualizacoes/5.0/i386/openssh-askpass-gnome-2.1.1p1-1cl.i386.rpm
        ftp://ftp.conectiva.com.br/pub/conectiva/atualizacoes/5.0/i386/openssh-clients-2.1.1p1-1cl.i386.rpm
        ftp://ftp.conectiva.com.br/pub/conectiva/atualizacoes/5.0/i386/openssh-server-2.1.1p1-1cl.i386.rpm
        ftp://ftp.conectiva.com.br/pub/conectiva/atualizacoes/5.0/i386/openssl-0.9.5a-1cl.i386.rpm
        ftp://ftp.conectiva.com.br/pub/conectiva/atualizacoes/5.0/i386/openssl-devel-0.9.5a-1cl.i386.rpm
        DIRECT LINK TO THE SOURCE PACKAGE
        ftp://ftp.conectiva.com.br/pub/conectiva/atualizacoes/5.0/SRPMS/openssh-2.1.1p1-1cl.src.rpm
        ftp://ftp.conectiva.com.br/pub/conectiva/atualizacoes/5.0/SRPMS/openssl-0.9.5a-1cl.src.rpm
        FreeBSD:
        Versions of FreeBSD 4 and 5, released after June 11, 2000 contain a version of OpenSSH that is not vulnerable to this problem. For those users who do not want to download and install the latest version of OpenSSH, a patch has been made available.

- 漏洞信息

341
OpenSSH UseLogin Local Privilege Escalation
Local Access Required, Remote / Network Access Input Manipulation, Misconfiguration
Loss of Confidentiality, Loss of Integrity, Loss of Availability
Exploit Public

- 漏洞描述

OpenSSH contains a flaw that may allow a malicious user to gain access to unauthorized privileges. The issue is triggered when the UseLogin option is enabled. sshd does not switch to the UID of the user logging in, relying on login(1) to do this. If the user specifies a command for remote execution, login(1) cannot be used and sshd fails to set the correct user id, so the command is executed with the privileges of the sshd process (normally root). This flaw may lead to a loss of Confidentiality, Integrity and/or Availability.

- 时间线

2000-10-06 Unknow
2000-10-06 Unknow

- 解决方案

Upgrade to version 2.1.1 or higher, as it has been reported to fix this vulnerability. It is also possible to correct the flaw by applying the vendor-supplied patch, or by disabling UseLogin.

- 相关参考

- 漏洞作者

Unknown or Incomplete
 

 

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