Re: [SECURITY] CVE-2009-0580 Apache Tomcat User enumeration vulnerability with FORM authentication
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Mark,
On 6/3/2009 11:42 AM, Mark Thomas wrote:
> CVE-2009-0580: Tomcat information disclosure vulnerability
I know I'm likely to get a vague response, but could you provide some
more info about this issue?
> Due to insufficient error checking in some authentication classes,
> Tomcat allows for the enumeration (brute force testing) of usernames by
> supplying illegally URL encoded passwords.
[snip]
> j_username=tomcat&j_password=%
I'm not sure how the patch (I read the patch for TC5.5
DataSourceRealm.java) changes anything at all: it appears to be merely a
performance optimization.
No changes are made to the behavior of Tomcat, since the same null is
returned to the caller if the credentials do not match.
I don't see any information disclosure vulnerability in the first place,
and I don't see how your patch would have fixed it.
??!
- -chris
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