IPCop Backup File Replacement Race Condition Vulnerability

BID:15378

Info

IPCop Backup File Replacement Race Condition Vulnerability

Bugtraq ID: 15378
Class: Design Error
CVE:
Remote: No
Local: Yes
Published: Nov 10 2005 12:00AM
Updated: Nov 10 2005 12:00AM
Credit: Juergen Schmidt is credited with the discovery of this vulnerability.
Vulnerable: IPCop IPCop 1.4.9
IPCop IPCop 1.4.8
IPCop IPCop 1.4.6
IPCop IPCop 1.4.5
IPCop IPCop 1.4.4
IPCop IPCop 1.4.2
IPCop IPCop 1.4.1
Not Vulnerable: IPCop IPCop 1.4.10

Discussion

IPCop Backup File Replacement Race Condition Vulnerability

IPCop is prone to a race condition that could permit the replacement of a backup file. This issue is due to the application changing the ownership on the file before it in encrypts it.

A local attacker must have access to the 'nobody' user account, either through legitimate means, or through some other latent vulnerability to exploit this issue.

Successful exploitation will replace the backup file with arbitrary attacker-supplied data. If the backup file is restored, system information may be overwritten with arbitrary data using superuser privileges.

Exploit / POC

IPCop Backup File Replacement Race Condition Vulnerability

No exploit is required.

Solution / Fix

IPCop Backup File Replacement Race Condition Vulnerability

Solution:
The vendor has addressed this issue in IPCop version 1.4.10 and later:


IPCop IPCop 1.4.1

IPCop IPCop 1.4.2

IPCop IPCop 1.4.4

IPCop IPCop 1.4.5

IPCop IPCop 1.4.6

IPCop IPCop 1.4.8

IPCop IPCop 1.4.9

References

IPCop Backup File Replacement Race Condition Vulnerability

References:

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