发布时间 :1998-07-03 00:00:00
修订时间 :2016-10-17 22:04:12

[原文]The at program in IRIX 6.2 and NetBSD 1.3.2 and earlier allows local users to read portions of arbitrary files by submitting the file to at with the -f argument, which generates error messages that at sends to the user via e-mail.

[CNNVD]IRIX NetBSD错误信息漏洞(CNNVD-199807-005)

        IRIX 6.2 和NetBSD 1.3.2及其早期版本的at程序中存在漏洞,本地用户通过提交文件到at程序带-f参数从而读取任意文件的部分内容,在通过电子邮件发送到用户时,会生成错误信息。

- CVSS (基础分值)

CVSS分值: 2.1 [轻微(LOW)]
机密性影响: PARTIAL [很可能造成信息泄露]
完整性影响: NONE [不会对系统完整性产生影响]
可用性影响: NONE [对系统可用性无影响]
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:netbsd:netbsd:1.3.1NetBSD 1.3.1
cpe:/o:netbsd:netbsd:1.2.1NetBSD 1.2.1
cpe:/o:netbsd:netbsd:1.3NetBSD 1.3
cpe:/o:netbsd:netbsd:1.2NetBSD 1.2
cpe:/o:sgi:irix:6.5SGI IRIX 6.5
cpe:/o:netbsd:netbsd:1.1NetBSD 1.1
cpe:/o:sgi:irix:6.4SGI IRIX 6.4
cpe:/o:sgi:irix:6.2SGI IRIX 6.2
cpe:/o:netbsd:netbsd:1.0NetBSD 1.0
cpe:/o:sgi:irix:6.5.1SGI IRIX 6.5.1
cpe:/o:netbsd:netbsd:1.3.2NetBSD 1.3.2

- 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  19980805 irix-6.2 "at -f" vulnerability
(UNKNOWN)  XF  at-f-read-files(7577)
(VENDOR_ADVISORY)  BUGTRAQ  19980703 more about 'at'

- 漏洞信息

IRIX NetBSD错误信息漏洞
低危 未知
1998-07-03 00:00:00 2005-05-02 00:00:00
        IRIX 6.2 和NetBSD 1.3.2及其早期版本的at程序中存在漏洞,本地用户通过提交文件到at程序带-f参数从而读取任意文件的部分内容,在通过电子邮件发送到用户时,会生成错误信息。

- 公告与补丁


- 漏洞信息 (19261)

NetBSD <= 1.3.2,SGI IRIX <= 6.5.1 at(1) Vulnerability (EDBID:19261)
netbsd/x86 local
1998-06-27 Verified
0 Gutierrez
N/A [点击下载]

A vulnerability exists in NetBSD version 1.3.2 and lower, and Silicon Graphics Inc's IRIX versions 6.2, 6.3, 6.4, 6.5 and 6.5.1. The at(1) program can be supplied with a -f flag, and an error is access validation can result in the mailing of portions of unreadable files to any user who can run at.

At uses seteuid to set the appropriate user id to run under. However, it incorrectly sets its real and effective uid to 0 prior to opening the filename passed to the -f flag. This allows any user to read any file on the filesystem. 

$ at -f /etc/shadow now + 1 minute

This will mail back a portion of the shadow file to the user.


- 漏洞信息

Multiple Vendor at -f Arbitrary File Read
Local Access Required Information Disclosure
Loss of Confidentiality Patch / RCS
Exploit Public Third-party Verified

- 漏洞描述

- 时间线

1998-07-03 Unknow
Unknow Unknow

- 解决方案

Currently, there are no known workarounds or upgrades to correct this issue. However, NetBSD and SGI have released patches to address this vulnerability.

- 相关参考

- 漏洞作者

Unknown or Incomplete