Bug 79868
| Summary: | define STDIN dumps core - Segmentation Fault | ||
|---|---|---|---|
| Product: | [Retired] Red Hat Linux | Reporter: | Timothy Burt <tburt> |
| Component: | php | Assignee: | Joe Orton <jorton> |
| Status: | CLOSED CURRENTRELEASE | QA Contact: | David Lawrence <dkl> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 7.3 | CC: | alan, mjc |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | i386 | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2005-02-03 12:09:13 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
Removing security status, this isn't a security issue. A segmentation fault you cause by crashing a program that is running as yourself isn't a vulnerability. Thanks for the quick reply. However, if this script is called from a webpage (php is after all a web scripting language), and it creates a segmentation fault, then isn't there the possibility that this could become a remote exploit? Not a root exploit, since Apache no longer runs as root, but at least to the privlege level of the webserver (Apache)? Could a hosting client ftp the example script to a server and possibly obtain Apache privleges by running the script from a browser? Is this a security issue? Thanks again for the prompt reply. I will let you be the judge. I just finished a compile of PHP 4.2.2 from the RH 8.0 distribution, and it does not core dump. I copied the executable to /usr/bin/php422, and I call it explicitly from my scripts. This is a satisfactory workaround for me. You can go ahead and close this bug with the usual "Fixed in Rawhide". Works for me in 8.0 I agree its security since hosting sites for example may allow secure php stuff but this might allow shell access. Until we know why it crashes I think its a bug |
From Bugzilla Helper: User-Agent: Mozilla/4.0 (compatible; MSIE 5.5; Windows NT 5.0) Description of problem: If executed from a shell prompt. The following code fragment dumps core: #!/usr/bin/php <? define('STDIN',fopen("php://stdin","r")); ?> This has been tested with PHP Version 4.1.2 on a fully patched up: Red Hat Linux release 7.0 (Guinness) Kernel 2.2.19-7.0.16 on an i686 and: Red Hat Linux release 7.3 (Valhalla) Kernel 2.4.18-3 Version-Release number of selected component (if applicable): How reproducible: Always Steps to Reproduce: 1. create the three line script 2. ./scriptname 3. Segmentation fault (core dumped) OR Segmentation fault Actual Results: Segmentation fault Additional info: My scripts are broken. I don't know of a workaround. Does anybody know of a way to capture STDIN without core dumping? Core Dumps = Potential for exploit.