CVE-2000-0462
CVSS2.1
发布时间 :2000-05-28 00:00:00
修订时间 :2008-09-10 15:04:43
NMCO    

[原文]ftpd in NetBSD 1.4.2 does not properly parse entries in /etc/ftpchroot and does not chroot the specified users, which allows those users to access other files outside of their home directory.


[CNNVD]NetBSD ftpchroot分析漏洞(CNNVD-200005-098)

        NetBSD 1.4.2版本中ftpd无法正确解析/etc/ftpchroot条目,chroot指定用户。用户利用此漏洞可以访问主目录之外的其他文件。

- 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:1.4.2::arm32
cpe:/o:netbsd:netbsd:1.4.2::sparc
cpe:/o:netbsd:netbsd:1.4.2::alpha
cpe:/o:netbsd:netbsd:1.4.2::x86

- 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-2000-0462
(官方数据源) MITRE
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2000-0462
(官方数据源) NVD
http://www.cnnvd.org.cn/vulnerability/show/cv_cnnvdid/CNNVD-200005-098
(官方数据源) CNNVD

- 其它链接及资源

http://www.securityfocus.com/bid/1273
(UNKNOWN)  BID  1273
http://www.osvdb.org/1366
(UNKNOWN)  OSVDB  1366
ftp://ftp.netbsd.org/pub/NetBSD/misc/security/advisories/NetBSD-SA2000-006.txt.asc
(UNKNOWN)  NETBSD  NetBSD-SA2000-006

- 漏洞信息

NetBSD ftpchroot分析漏洞
低危 设计错误
2000-05-28 00:00:00 2005-05-02 00:00:00
本地  
        NetBSD 1.4.2版本中ftpd无法正确解析/etc/ftpchroot条目,chroot指定用户。用户利用此漏洞可以访问主目录之外的其他文件。

- 公告与补丁

        From the advisory:
        This problem affects only NetBSD-1.4.2 and versions of NetBSD-current
        between 19990930 and 19991212; it does not affect NetBSD-1.4.1 or
        earlier, or versions of NetBSD-current after 19991212 or before 19990930.
        If you do not need to use /etc/ftpchroot, you do not need to take any
        action.
        If you're running NetBSD-current fetched between the above dates,
        update to a newer version of NetBSD-current.
        If you're runing NetBSD-1.4.2, fetch the following patch, apply it to
        src/libexec/ftpd/ftpd.c using the patch(1) command, rebuild and
        reinstall ftpd, and kill off any existing FTP daemons (to ensure that
        any improperly granted access is revoked).
        ftp://ftp.NetBSD.ORG/pub/NetBSD/misc/security/patches/20000527-ftpd
        Since the patch is small, it is reproduced inline here:
        *** ftpd.c 1999/10/01 12:08:06 1.61.2.1
        - --- ftpd.c 2000/05/11 10:14:37 1.61.2.2
        ***************
        *** 489,496 ****
         if (glob == NULL || glob[0] == '#')
         continue;
         perm = strtok(NULL, " \t\n");
        - - if (perm == NULL)
        - - continue;
         if (fnmatch(glob, name, 0) == 0) {
         if (perm != NULL &&
         ((strcasecmp(perm, "allow") == 0) ||
        - --- 489,494 ----

- 漏洞信息

1366
NetBSD ftpchroot Broken Parsing Arbitrary File Access
Remote / Network Access Misconfiguration
Loss of Confidentiality
Exploit Public

- 漏洞描述

NetBSD contains a flaw that may allow a malicious user to gain access to unauthorized privileges. The issue is triggered when ftpd fails to parse "/etc/ftpchroot" and the chroot function is not called, which allows malicious users to access files outside their home directories. This flaw may lead to a loss of confidentiality.

- 时间线

2000-05-28 Unknow
2000-05-28 Unknow

- 解决方案

Currently, there are no known workarounds or upgrades to correct this issue. However, NetBSD has released a patch to address this vulnerability.

- 相关参考

- 漏洞作者

 

 

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