Bug 1232292 (CVE-2015-3225)

Summary: CVE-2015-3225 rubygem-rack: Potential Denial of Service Vulnerability in Rack normalize_params()
Product: [Other] Security Response Reporter: Vasyl Kaigorodov <vkaigoro>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED WONTFIX QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: abaron, aortega, apatters, apevec, ayoung, bhu, bkearney, bleanhar, carnil, cbillett, ccoleman, chrisw, cpelland, cperry, dajohnso, dallan, dclarizi, dmcphers, esammons, gkotton, gmccullo, iboverma, jdetiber, jhardy, jialiu, jkeck, jliggitt, joelsmith, jokerman, jorton, jprause, jross, jrusnack, jvlcek, kseifried, lhh, lmeyer, lpeer, markmc, matt, mburns, mcressma, mmaslano, mmccomas, mmccune, obarenbo, ohadlevy, rbryant, sclewis, security-response-team, tjay, tomckay, vondruch, williams, xlecauch, yeylon
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Fixed In Version: rubygem-rack-1.6.2, rubygem-rack-1.5.4 Doc Type: Bug Fix
Doc Text:
A flaw was found in a way Rack processed parameters of incoming requests. An attacker could use this flaw to send a crafted request that would cause an application using Rack to crash.
Story Points: ---
Clone Of: Environment:
Last Closed: 2015-08-04 06:18:05 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Bug Depends On: 1248924, 1232644, 1248923, 1248925, 1248926, 1248927    
Bug Blocks: 1210268, 1232293    
Description Flags
1-6-deep_params.patch none

Description Vasyl Kaigorodov 2015-06-16 12:43:58 UTC
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.

Comment 1 Vasyl Kaigorodov 2015-06-16 12:45:52 UTC
Created attachment 1039440 [details]

Comment 2 Vasyl Kaigorodov 2015-06-16 12:46:10 UTC
Created attachment 1039441 [details]

Comment 3 Kurt Seifried 2015-06-16 19:35:34 UTC
This is public now:


Comment 4 Ján Rusnačko 2015-07-31 07:20:32 UTC
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. "

External References:

Comment 8 Ján Rusnačko 2015-07-31 07:27:29 UTC
Created rubygem-rack tracking bugs for this issue:

Affects: fedora-all [bug 1248923]
Affects: epel-all [bug 1248924]

Comment 10 Fedora Update System 2015-08-19 08:09:17 UTC
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.

Comment 11 Fedora Update System 2015-08-27 23:49:23 UTC
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.

Comment 12 errata-xmlrpc 2015-11-19 09:37:35 UTC
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