Bug 163013

Summary: CAN-2005-1268 mod_ssl off-by-one
Product: Red Hat Enterprise Linux 4 Reporter: Mark J. Cox <mjc>
Component: httpdAssignee: Joe Orton <jorton>
Status: CLOSED ERRATA QA Contact:
Severity: low Docs Contact:
Priority: medium    
Version: 4.0Keywords: Security
Target Milestone: ---   
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard: public=20050608,impact=low,source=apache
Fixed In Version: Doc Type: Bug Fix
Doc Text:
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Clone Of: Environment:
Last Closed: 2005-07-25 07:50:37 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Description Mark J. Cox 2005-07-12 09:15:07 UTC
Marc Stern reported an off-by-one overflow in the mod_ssl CRL verification
callback.  In order to exploit this issue the Apache server would need to be
configured to use a malicious certificate revocation list (CRL) (CAN-2005-1268).


Mitigation: by default the Apache web server is not configured to use any
certificate revocation lists.  If Apache has been configured to use a
certificate revocation list, that list would have to be malicious in order to
cause the overflow.  As the overflow is a single null byte stack overflow this
would have minimal effect on RHEL3 or RHEL4, most likely just causing the
current child process to die, and be replaced when required.

Also affects RHEL3

Comment 1 Mark J. Cox 2005-07-25 07:50:37 UTC
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.