CVE-2011-0762

The vsf_filename_passes_filter function in ls.c in vsftpd before 2.3.3 allows remote authenticated users to cause a denial of service (CPU consumption and process slot exhaustion) via crafted glob expressions in STAT commands in multiple FTP sessions, a different vulnerability than CVE-2010-2632.

Weakness

The product does not properly control the allocation and maintenance of a limited resource.

Affected Software

Name	Vendor	Start Version	End Version
Vsftpd	Vsftpd_project	*	2.3.3 (excluding)
Red Hat Enterprise Linux 4	RedHat	vsftpd-0:2.0.1-9.el4	*
Red Hat Enterprise Linux 5	RedHat	vsftpd-0:2.0.5-16.el5_6.1	*
Red Hat Enterprise Linux 6	RedHat	vsftpd-0:2.2.2-6.el6_0.1	*
Vsftpd	Ubuntu	dapper	*
Vsftpd	Ubuntu	devel	*
Vsftpd	Ubuntu	hardy	*
Vsftpd	Ubuntu	karmic	*
Vsftpd	Ubuntu	lucid	*
Vsftpd	Ubuntu	maverick	*
Vsftpd	Ubuntu	upstream	*

Potential Mitigations

Mitigation of resource exhaustion attacks requires that the target system either:
The first of these solutions is an issue in itself though, since it may allow attackers to prevent the use of the system by a particular valid user. If the attacker impersonates the valid user, they may be able to prevent the user from accessing the server in question.
The second solution is simply difficult to effectively institute – and even when properly done, it does not provide a full solution. It simply makes the attack require more resources on the part of the attacker.

NVD	https://nvd.nist.gov/vuln/detail/CVE-2011-0762
CWE	https://cwe.mitre.org/data/definitions/400.html

Uncontrolled Resource Consumption

Weakness

Affected Software

Potential Mitigations

References

CVE-2011-0762

Uncontrolled Resource Consumption

Weakness

Affected Software

Potential Mitigations

Related Attack Patterns

References