ID

VAR-200705-0566

CVE

CVE-2007-2462

TITLE

Cisco ASA clientless SSL VPN denial of service vulnerability

DESCRIPTION

Unspecified vulnerability in Cisco Adaptive Security Appliance (ASA) and PIX 7.2 before 7.2(2)8, when using Layer 2 Tunneling Protocol (L2TP) or Remote Management Access, allows remote attackers to bypass LDAP authentication and gain privileges via unknown vectors. The Cisco ASA and PIX firewalls contain an authentication bypass vulnerability. This vulnerability may allow a remote attacker to gain unauthorized access to the internal network or firewall. The Cisco Adaptive Security Appliance contains a memory exhaustion vulnerability that may occur when the DHCP service relay is enabled. According to Cisco Systems information LDAP With authentication PAP (Password Authentication Protocol) There is no effect if is set to use.To a third party LDAP Authentication can be bypassed and unauthorized access to the appliance and internal resources can occur. PIX is a firewall device that provides policy enforcement, multi-vector attack protection and secure connection services for users and applications; Adaptive Security Appliance (ASA) is a modular platform that provides security and VPN services. Remote attackers may use this vulnerability to cause the device to fail to work normally or to bypass authentication. Access to the management session must be explicitly enabled in the device configuration and restricted to defined IP addresses only. This vulnerability is documented in Cisco Bug ID as CSCsh42793. ---------------------------------------------------------------------- Try a new way to discover vulnerabilities that ALREADY EXIST in your IT infrastructure. Join the FREE BETA test of the Network Software Inspector (NSI)! http://secunia.com/network_software_inspector/ The NSI enables you to INSPECT, DISCOVER, and DOCUMENT vulnerabilities in more than 4,000 different Windows applications. 2) An unspecified error when using VPN connections configured with password expiry can be exploited to cause a DoS. Successful exploitation requires that the tunnel group is configured with password expiry. In order to exploit this in IPSec VPN connections, an attacker also needs to know the group name and group password. 3) A race condition within the processing of non-standard SSL sessions in the SSL VPN server of Cisco ASA appliances can be exploited to cause the device to reload. Successful exploitation requires that clientless SSL is used. 4) An error within the DHCP relay agent when handling DHCPACK messages can be exploited to cause a DoS due to memory exhaustion by sending a large number of DHCP requests to a vulnerable device. Successful exploitation requires that devices are configured to use the DHCP relay agent. SOLUTION: Apply updated software versions. Please see vendor advisories for details. PROVIDED AND/OR DISCOVERED BY: 1-3) Reported by the vendor. 4) Lisa Sittler and Grant Deffenbaugh, CERT/CC. ORIGINAL ADVISORY: Cisco: http://www.cisco.com/warp/public/707/cisco-sa-20070502-asa.shtml http://www.cisco.com/warp/public/707/cisco-sr-20070502-pix.shtml http://www.cisco.com/en/US/products/products_security_response09186a0080833172.html http://www.cisco.com/en/US/products/products_applied_intelligence_response09186a008083316f.html US-CERT VU#530057: http://www.kb.cert.org/vuls/id/530057 OTHER REFERENCES: US-CERT VU#210876: http://www.kb.cert.org/vuls/id/210876 ---------------------------------------------------------------------- About: This Advisory was delivered by Secunia as a free service to help everybody keeping their systems up to date against the latest vulnerabilities. Subscribe: http://secunia.com/secunia_security_advisories/ Definitions: (Criticality, Where etc.) http://secunia.com/about_secunia_advisories/ Please Note: Secunia recommends that you verify all advisories you receive by clicking the link. Secunia NEVER sends attached files with advisories. Secunia does not advise people to install third party patches, only use those supplied by the vendor. ---------------------------------------------------------------------- Unsubscribe: Secunia Security Advisories http://secunia.com/sec_adv_unsubscribe/?email=packet%40packetstormsecurity.org ----------------------------------------------------------------------

AFFECTED PRODUCTS

CVSS

PROBLEMTYPE DATA

THREAT TYPE

remote

TYPE

lack of information

CONFIGURATIONS

PATCH

EXTERNAL IDS

REFERENCES

CREDITS

Cisco Security bulletin

SOURCES

LAST UPDATE DATE

2024-11-23T22:43:22.824000+00:00

SOURCES UPDATE DATE

SOURCES RELEASE DATE