Cisco IOS VPND interface descriptor block (IDB) denial of service
| cisco-ios-vpdn-idb-dos (41484) |  Medium Risk |
Description:
Cisco IOS is vulnerable to a denial of service, caused by an error when PPTP is used as the tunneling protocol on a virtual private dial-up network (VPDN). After a PPTP session is completed, virtual access interfaces are not reused. By terminating multiple PPTP sessions, a remote attacker could exploit this vulnerability to exceed the interface descriptor block limit to cause all subsequent VPDN connection requests to be blocked.
*CVSS:
| Base Score: | 4.3 |
| Access Vector: | Network |
| Access Complexity: | Medium |
| Authentication: | None |
| Confidentiality Impact: | None |
| Integrity Impact: | None |
| Availability Impact: | Partial |
| Temporal Score: | 3.2 |
| Exploitability: | Unproven |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Denial of Service
Remedy:
Refer to cisco-sa-20080326-pptp for patch, upgrade or suggested workaround information. See References.
References:
- cisco-sa-20080326-pptp: Cisco Security Advisory: Cisco IOS Virtual Private Dial-up Network Denial of Service Vulnerability.
- BID-28460: Cisco IOS Virtual Private Dial-up Network Multiple Denial of Service Vulnerabilities
- CVE-2008-1150: The virtual private dial-up network (VPDN) component in Cisco IOS before 12.3 allows remote attackers to cause a denial of service (resource exhaustion) via a series of PPTP sessions, related to the persistence of interface descriptor block (IDB) data structures after process termination, aka bug ID CSCdv59309.
- SA29507: Cisco IOS Multiple Vulnerabilities
- SECTRACK ID: 1019714: Cisco IOS Bugs in Virtual Private Dial-up Network PPTP Connection Termination Let Remote Users Deny Service
- VUPEN/ADV-2008-1006: Cisco IOS Denial of Service and Information Disclosure Vulnerabilities
Platforms Affected:
- Cisco IOS 12.0XE
- Cisco IOS 12.1AY
- Cisco IOS 12.1DC
- Cisco IOS 12.1E
- Cisco IOS 12.1EA
- Cisco IOS 12.1EC
- Cisco IOS 12.1EX
- Cisco IOS 12.1EY
- Cisco IOS 12.1EZ
- Cisco IOS 12.1T
- Cisco IOS 12.1XJ
- Cisco IOS 12.1XL
- Cisco IOS 12.1XM
- Cisco IOS 12.1XP
- Cisco IOS 12.1XQ
- Cisco IOS 12.1XR
- Cisco IOS 12.1XS
- Cisco IOS 12.1XT
- Cisco IOS 12.1XV
- Cisco IOS 12.1XY
- Cisco IOS 12.1YA
- Cisco IOS 12.1YB
- Cisco IOS 12.1YC
- Cisco IOS 12.1YD
- Cisco IOS 12.1YE
- Cisco IOS 12.1YF
- Cisco IOS 12.1YI
- Cisco IOS 12.2
- Cisco IOS 12.2DA
- Cisco IOS 12.2DD
- Cisco IOS 12.2DX
- Cisco IOS 12.2S
- Cisco IOS 12.2SU
- Cisco IOS 12.2SX
- Cisco IOS 12.2SY
- Cisco IOS 12.2SZ
- Cisco IOS 12.2XA
- Cisco IOS 12.2XC
- Cisco IOS 12.2XD
- Cisco IOS 12.2XE
- Cisco IOS 12.2XF
- Cisco IOS 12.2XG
- Cisco IOS 12.2XH
- Cisco IOS 12.2XI
- Cisco IOS 12.2XJ
- Cisco IOS 12.2XK
- Cisco IOS 12.2XQ
- Cisco IOS 12.2XS
- Cisco IOS 12.2XT
- Cisco IOS 12.2XU
- Cisco IOS 12.2XV
- Cisco IOS 12.2YC
- Cisco IOS 12.2YE
- Cisco IOS 12.2YO
- Cisco IOS 12.2YX
Reported:
Mar 26, 2008
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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.