As defined by the CAS protocol, Service Tickets can only be validated
once. They cannot be reused.
Andy
On Thu, 5 Jan 2017, Gokhan Mansuroglu wrote:
I am asking how to prevent someone reusing a ST from a different client IP.
5 Ocak 2017 Perşembe 19:50:03 UTC+3 tarihinde Ray Bon yazdı:
Gokhan,
Are you ask how to reuse a ST or are you asking how to prevent someone
reusing a ST?
I will answer the second. ST lifetime is short (10 seconds by default, I
think). Once a ST has been submitted to CAS for validation (step 4 below)
or ticket lifetime has passed, CAS will mark the ST as expired and it can
no longer be used.
Ray
On 2017-01-05 04:14, Gokhan Mansuroglu wrote:
Hi,
I have an additional requirement for Cas protocol. I will simplify the
protocol just to explain my case;
1. Client tries to access *https://app.example.com
<http://app.example.com>*
2. Browser redirected to
*https://cas.example.com/cas/login?service=https://app.example.com
<https://cas.example.com/cas/login?service=https://app.example.com>*
3. User authenticates with username and password and redirected to
*https://app.examle.com
<https://app.examle.com>?ticket=ST-xxx*
4. The app send a validation request and gets the authentication
information.
Lets say you want to be able to use the service ticket multiple times.
Then whoever has the link *https://app.examle.com?ticket=ST-xxx
<https://app.examle.com?ticket=ST-xxx>* can successfully log in the
application which results in very risky situation.
What is your solution to this problem ?
Thank you very much.
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Ray Bon
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