A potential denial of service vulnerability in Rack was reported.
Carefully crafted requests can cause a `SystemStackError` and potentially cause a denial of service attack.
Patches that fix this are attached.
Red Hat would like to thank Ruby upstream developers for reporting this. Upstream acknowledges Tomek Rabczak from the NCC Group as the original reporter.
Created attachment 1039440 [details]
Created attachment 1039441 [details]
This is public now:
From upstream advisory:
"Versions Affected: All.
Not affected: None.
Fixed Versions: 1.6.2, 1.5.4
Carefully crafted requests can cause a `SystemStackError` and potentially
cause a denial of service attack.
All users running an affected release should either upgrade or use one of the workarounds immediately.
The FIXED releases are available at the normal locations.
There are no feasible workarounds for this issue. "
Created rubygem-rack tracking bugs for this issue:
Affects: fedora-all [bug 1248923]
Affects: epel-all [bug 1248924]
rubygem-rack-1.6.1-2.fc22 has been pushed to the Fedora 22 stable repository. If problems still persist, please make note of it in this bug report.
rubygem-rack-1.5.2-5.fc21 has been pushed to the Fedora 21 stable repository. If problems still persist, please make note of it in this bug report.
This issue has been addressed in the following products:
Red Hat Enterprise Linux 7
Via RHSA-2015:2290 https://rhn.redhat.com/errata/RHSA-2015-2290.html