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An improper authentication vulnerability can be exploited through a race condition that occurs in Ellucian Banner Web Tailor 8.8.3, 8.8.4, and 8.9 and Banner Enterprise Identity Services 8.3, 8.3.1, 8.3.2, and 8.4, in conjunction with SSO Manager. This vulnerability allows remote attackers to steal a victim's session (and cause a denial of service) by repeatedly requesting the initial Banner Web Tailor main page with the IDMSESSID cookie set to the victim's UDCID, which in the case tested is the institutional ID. During a login attempt by a victim, the attacker can leverage the race condition and will be issued the SESSID that was meant for this victim.

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Ellucian Banner Web Tailor和Banner Enterprise Identity Services 安全漏洞

Ellucian Banner Web Tailor和Banner Enterprise Identity Services中存在竞争条件问题漏洞。该漏洞源于网络系统或产品在运行过程中，并发代码需要互斥地访问共享资源时，对于并发访问的处理不当。以下产品及版本受到影响：Ellucian Banner Web Tailor 8.8.3、8.8.4和8.9版本；Banner Enterprise Identity Services 8.3、8.3.1、8.3.2和8.4版本。

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