https://www.exploit-db.com/exploits/20568
http://www.cnnvd.org.cn/web/xxk/ldxqById.tag?CNNVD=CNNVD-199702-002

Skunkware2.0系统是由SantaCruz开发维护的一个Unix系统变种，view-source是其httpd部分中的一个脚本。view-source脚本实现上存在一个输入验证漏洞，远程攻击者可能利用此漏洞遍历服务器目录。view-source脚本对用户输入未做充过滤，远程攻击者可以在提供给脚本的参数中插入一系列”../”来遍历服务目录，访问读取任意Web进程有权限读取的文件，造成信息泄露。攻击者可以利用此漏洞收集到系统相关的很多有价值信息，可能有助于其进一步攻击。

source: http://www.securityfocus.com/bid/2251/info

view-source is a script included with the httpd package bundled with Skunkware 2.0. Skunkware 2.0 is a variant of the UNIX Operating System distributed by Santa Cruz Operations.

A problem with the view-source script could allow access to restricted files remotely. The problem occurs in the handling of slashes and dots when appended to the view-source script. By appending a series of double-dots and slashes to a query using the view-source script, it is possible to traverse the directory structure on a web server. By doing so, it is possible for to view the contents of directories, and files that are readable by the UID of the httpd process. This flaw makes it possible for a user with malicious motives to read files on a remote system and gather intelligence for an attack against the system, as well as other potentially sensitive information. 

http://vulnerable.server/cgi-bin/view-source?../../../../../../../etc/passwd

VulnerablesoftwareandversionsConfiguration1OR*cpe:/a:netscape:communicator:4.0*cpe:/a:netscape:communicator:4.05*cpe:/a:netscape:communicator:4.06*cpe:/a:netscape:communicator:4.07*cpe:/a:netscape:communicator:4.5*cpe:/a:netscape:communicator:4.51*cpe:/a:netscape:communicator:4.6*DenotesVulnerableSoftware*ChangesrelatedtovulnerabilityconfigurationsTechnicalDetailsVulnerabilityType(ViewAll)CVEStandardVulnerabilityEntry:http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-1999-0174