Products & Services
Support

Product Categories


Popular Downloads


Manage Software

How to Buy

For Home

Linksys Products Store
Linksys is now part of Belkin
Products for everyone

All Ordering Options

Training & Events Partners
Guest

Vulnerability Alert

Cisco IOS Software Zone-Based Firewall HTTP Inspection Engine Denial of Service Vulnerability

 
Threat Type:CWE-399: Resource Management Errors
IntelliShield ID:25366
Version:1
First Published:2012 March 28 16:15 GMT
Last Published:2012 March 28 16:15 GMT
Port: 80
CVE:CVE-2012-0387
Urgency:Unlikely Use
Credibility:Confirmed
Severity:Mild Damage
CVSS Base:7.8 CVSS Calculator
CVSS Version 2.0
CVSS Temporal:6.4
Related Resources:
View related Security AdvisoryView related IPS Signature
 
 
Version Summary:

Cisco IOS Software contains a vulnerability that could allow an unauthenticated, remote attacker to cause a denial of service condition on a targeted system.  Updates are available.

 
 
Description

Cisco IOS Software contains a vulnerability that could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on a targeted system.

The vulnerability is due to improper boundary checks by the HTTP inspection engine while inspecting transit HTTP traffic in the affected device.  An unauthenticated, remote attacker could exploit this vulnerability by sending crafted HTTP packets through the targeted device.  If successful, the attacker could cause the device to reload, resulting in a DoS condition.

Cisco has confirmed the vulnerability in a security advisory and released software updates.

 
Warning Indicators

Cisco has published a list of affected Cisco IOS Software releases in the security advisory.  The Vendor Announcements section of this alert contains a link to the advisory.

 
IntelliShield Analysis

To exploit the vulnerability, the attacker may provide a malicious link and use misleading language or instructions to persuade the user to follow the provided link.  Following the provided link cause crafted HTTP packets to travel through the affected device, triggering the vulnerability.

Cisco indicates through the CVSS score that functional exploit code exists; however, the code is not known to be publicly available.

 
Vendor Announcements

Cisco has released a security advisory for Cisco bug ID CSCtq36153 at the following link: cisco-sa-20120328-zbfw

 
Impact

An unauthenticated, remote attacker could exploit this vulnerability to cause a targeted device to reload, resulting in a DoS condition.  Repeated attacks could result in a sustained DoS condition.

 
Technical Information

The vulnerability is due to improper boundary checks by the HTTP inspection engine while inspecting transit HTTP traffic via TCP port 80 on the affected device.  The processing of crafted HTTP messages can cause the affected device to reload or to trigger memory leaks that may result in system instabilities.

An unauthenticated, remote attacker could exploit this vulnerability by sending crafted HTTP packets through the targeted device.  If successful, the attacker could cause the device to reload, resulting in a DoS condition.

 
Safeguards

Administrators are advised to apply the appropriate updates.

Administrators are advised to allow only privileged users to access administration or management systems.

Administrators are advised to implement an intrusion prevention system (IPS) or intrusion detection system (IDS) to help detect and prevent attacks that attempt to exploit this vulnerability.

Administrators may consider using IP-based access control lists (ACLs) to allow only trusted systems to access the affected systems.

Administrators are advised to monitor critical systems.

 
Patches/Software

Cisco customers with active contracts can obtain updates through the Software Center at the following link: Cisco. Cisco customers without contracts can obtain upgrades by contacting the Cisco Technical Assistance Center at 1-800-553-2447 or 1-408-526-7209 or via e-mail at tac@cisco.com.


Signatures
 
Cisco Intrusion Prevention System (IPS) 6.0
Signature IDSignature NameReleaseLatest Release Date
41406/0Cisco IOS URL DoSS6602012 Aug 09 
 
Alert History
 

Initial Release



Product Sets
 
The security vulnerability applies to the following combinations of products.

Primary Products:
CiscoIOS 12.4GC Base, 12.4(22)GC1, 12.4(22)GC1a, 12.4(24)GC1, 12.4(24)GC2, 12.4(24)GC3, 12.4(24)GC3a, 12.4(24)GC4 | 12.4MD Base, 12.4(11)MD, 12.4(11)MD1, 12.4(11)MD10, 12.4(11)MD11, 12.4(11)MD2, 12.4(11)MD3, 12.4(11)MD4, 12.4(11)MD5, 12.4(11)MD6, 12.4(11)MD7, 12.4(11)MD8, 12.4(11)MD9, 12.4(15)MD, 12.4(15)MD1, 12.4(15)MD2, 12.4(15)MD3, 12.4(15)MD4, 12.4(15)MD5, 12.4(15)MD6, 12.4(22)MD, 12.4(22)MD1, 12.4(22)MD2, 12.4(22)MD3, 12.4(24)MD, 12.4(24)MD1, 12.4(24)MD2, 12.4(24)MD3, 12.4(24)MD4, 12.4(24)MD5, 12.4(24)MD6, 12.4(24)MD7, 12.4(111)MD, 12.4(115)MD, 12.4(122)MD | 12.4MDA Base, 12.4(22)MDA, 12.4(22)MDA1, 12.4(22)MDA2, 12.4(22)MDA3, 12.4(22)MDA4, 12.4(22)MDA5, 12.4(22)MDA6, 12.4(22)MDA7, 12.4(24)MDA, 12.4(24)MDA1, 12.4(24)MDA10, 12.4(24)MDA11, 12.4(24)MDA12, 12.4(24)MDA2, 12.4(24)MDA3, 12.4(24)MDA4, 12.4(24)MDA5, 12.4(24)MDA6, 12.4(24)MDA7, 12.4(24)MDA8, 12.4(24)MDA9 | 12.4MDB Base, 12.4(24)MDB, 12.4(24)MDB1, 12.4(24)MDB2, 12.4(24)MDB3, 12.4(24)MDB4, 12.4(24)MDB5, 12.4(24)MDB5a, 12.4(24)MDB5b, 12.4(24)MDB6, 12.4(24)MDB7 | 12.4MR 12.4(119)MR, 12.4(119)MR1, Base, 12.4(2)MR, 12.4(2)MR1, 12.4(4)MR, 12.4(4)MR1, 12.4(6)MR, 12.4(6)MR1, 12.4(9)MR, 12.4(11)MR, 12.4(12)MR, 12.4(12)MR1, 12.4(12)MR2, 12.4(16)MR, 12.4(16)MR1, 12.4(16)MR2, 12.4(19)MR, 12.4(19)MR1, 12.4(19)MR2, 12.4(19)MR3, 12.4(20)MR, 12.4(20)MR2 | 12.4MRA Base, 12.4(20)MRA, 12.4(20)MRA1, 12.4(20)MRA2 | 12.4MRB Base, 12.4(20)MRB, 12.4(20)MRB1, 12.4(20)MRB2 | 12.4T Base, 12.4(2)T, 12.4(2)T1, 12.4(2)T2, 12.4(2)T3, 12.4(2)T4, 12.4(2)T5, 12.4(2)T6, 12.4(4)T, 12.4(4)T1, 12.4(4)T2, 12.4(4)T3, 12.4(4)T4, 12.4(4)T5, 12.4(4)T6, 12.4(4)T7, 12.4(4)T8, 12.4(6)T, 12.4(6)T1, 12.4(6)T10, 12.4(6)T11, 12.4(6)T12, 12.4(6)T2, 12.4(6)T3, 12.4(6)T4, 12.4(6)T5, 12.4(6)T5a, 12.4(6)T5b, 12.4(6)T5c, 12.4(6)T5d, 12.4(6)T5e, 12.4(6)T5f, 12.4(6)T6, 12.4(6)T7, 12.4(6)T8, 12.4(6)T9, 12.4(9)T, 12.4(9)T0a, 12.4(9)T1, 12.4(9)T2, 12.4(9)T3, 12.4(9)T4, 12.4(9)T5, 12.4(9)T6, 12.4(9)T7, 12.4(11)T, 12.4(11)T1, 12.4(11)T2, 12.4(11)T3, 12.4(11)T4, 12.4(15)T, 12.4(15)T1, 12.4(15)T10, 12.4(15)T11, 12.4(15)T12, 12.4(15)T13, 12.4(15)T13b, 12.4(15)T14, 12.4(15)T15, 12.4(15)T16, 12.4(15)T17, 12.4(15)T2, 12.4(15)T3, 12.4(15)T4, 12.4(15)T5, 12.4(15)T6, 12.4(15)T6a, 12.4(15)T7, 12.4(15)T8, 12.4(15)T9, 12.4(20)T, 12.4(20)T1, 12.4(20)T2, 12.4(20)T3, 12.4(20)T4, 12.4(20)T5, 12.4(20)T5a, 12.4(20)T6, 12.4(20)T6a, 12.4(20)T7, 12.4(20)T8, 12.4(20)T9, 12.4(22)T, 12.4(22)T1, 12.4(22)T2, 12.4(22)T3, 12.4(22)T4, 12.4(22)T5, 12.4(22)T6, 12.4(24)T, 12.4(24)T1, 12.4(24)T3(4), 12.4(24)T2, 12.4(24)T3(c5), 12.4(24)T3, 12.4(24)T3a, 12.4(24)T3b, 12.4(24)T3c, 12.4(24)T3e, 12.4(24)T3f, 12.4(24)T31f, 12.4(24)T3g, 12.4(24)T34(d1), 12.4(24)T34d, 12.4(24)T35c, 12.4(24)T4, 12.4(24)T4a, 12.4(24)T4b, 12.4(24)T4c, 12.4(24)T4d, 12.4(24)T4e, 12.4(24)T5, 12.4(24)T6, 12.4(24)T7, 12.4(24)T8, 12.4(24)T9, 12.4(100)T, 12.4(102)T, 12.4(104)T, 12.4(106)T, 12.4(106)T5, 12.4(106)T5a, 12.4(109)T, 12.4(111)T, 12.4(115)T, 12.4(120)T, 12.4(122)T | 12.4XR Base, 12.4(15)XR, 12.4(15)XR1, 12.4(15)XR10, 12.4(15)XR2, 12.4(15)XR3, 12.4(15)XR4, 12.4(15)XR5, 12.4(15)XR6, 12.4(15)XR7, 12.4(15)XR8, 12.4(15)XR9, 12.4(22)XR, 12.4(22)XR1, 12.4(22)XR10, 12.4(22)XR11, 12.4(22)XR12, 12.4(22)XR2, 12.4(22)XR3, 12.4(22)XR4, 12.4(22)XR5, 12.4(22)XR6, 12.4(22)XR7, 12.4(22)XR8, 12.4(22)XR9, 12.4(115)XR | 12.4XZ Base, 12.4(15)XZ, 12.4(15)XZ1, 12.4(15)XZ2, 12.4(115)XZ | 12.4YA Base, 12.4(20)YA, 12.4(20)YA1, 12.4(20)YA2, 12.4(20)YA3, 12.4(120)YA | 12.4YB Base, 12.4(22)YB, 12.4(22)YB1, 12.4(22)YB2, 12.4(22)YB3, 12.4(22)YB4, 12.4(22)YB5, 12.4(22)YB6, 12.4(22)YB7, 12.4(22)YB8, 12.4(122)YB | 12.4YD Base, 12.4(22)YD, 12.4(22)YD1, 12.4(22)YD2, 12.4(22)YD3, 12.4(22)YD4, 12.4(100)YD | 12.4YE Base, 12.4(22)YE, 12.4(22)YE1, 12.4(22)YE100, 12.4(22)YE2, 12.4(22)YE3, 12.4(22)YE4, 12.4(22)YE5, 12.4(22)YE6, 12.4(24)YE, 12.4(24)YE1, 12.4(24)YE2, 12.4(24)YE3, 12.4(24)YE3a, 12.4(24)YE3b, 12.4(24)YE3c, 12.4(24)YE3d, 12.4(24)YE4, 12.4(24)YE5, 12.4(24)YE6, 12.4(24)YE7 | 12.4YG Base, 12.4(24)YG1, 12.4(24)YG2, 12.4(24)YG3, 12.4(24)YG4 | 15.0M Base, 15.0(1)M, 15.0(1)M1, 15.0(1)M10, 15.0(1)M11, 15.0(1)M2, 15.0(1)M3, 15.0(1)M4, 15.0(1)M5, 15.0(1)M5a, 15.0(1)M6, 15.0(1)M6a, 15.0(1)M7, 15.0(1)M8, 15.0(1)M9 | 15.0XA Base, 15.0(1)XA, 15.0(1)XA1, 15.0(1)XA2, 15.0(1)XA3, 15.0(1)XA4, 15.0(1)XA5 | 15.1GC Base, 15.1(2)GC, 15.1(2)GC1, 15.1(2)GC2 | 15.1M Base, 15.1(4)M, 15.1(4)M0a, 15.1(4)M0b, 15.1(4)M1, 15.1(4)M2, 15.1(4)M3, 15.1(4)M3a, 15.1(4)M4, 15.1(4)M5, 15.1(4)M6, 15.1(4)M7 | 15.1T Base, 15.1(1)T, 15.1(1)T1, 15.1(1)T2, 15.1(1)T3, 15.1(1)T4, 15.1(1)T5, 15.1(2)T, 15.1(2)T0a, 15.1(2)T1, 15.1(2)T10, 15.1(2)T2, 15.1(2)T2a, 15.1(2)T3, 15.1(2)T4, 15.1(2)T5, 15.1(3)T, 15.1(3)T1, 15.1(3)T2, 15.1(3)T3, 15.1(3)T4, 15.1(4)T, 15.1(100)T | 15.1XB Base, 15.1(1)XB, 15.1(1)XB1, 15.1(1)XB2, 15.1(1)XB3, 15.1(4)XB4, 15.1(4)XB5, 15.1(4)XB5a, 15.1(4)XB6, 15.1(4)XB7 | 15.2GC 15.2(1)GC, Base, 15.2(1)GC1, 15.2(1)GC2 | 15.2T Base, 15.2(1)T, 15.2(1)T1, 15.2(1)T2, 15.2(1)T3, 15.2(1)T4, 15.2(2)T, 15.2(2)T1, 15.2(2)T2, 15.2(2)T3, 15.2(2)T4, 15.2(3)T, 15.2(3)T1, 15.2(3)T2, 15.2(3)T3, 15.2(3)T4

Associated Products:
CiscoIOS 15.0M | 15.0XA | 15.1GC | 15.1M | 15.1T | 15.1XB | 15.2GC | 15.2T




Alerts and bulletins on the Cisco Security Intelligence Operations Portal are highlighted by analysts in the Cisco Threat Operations Center and represent a subset of the comprehensive content that is available through Cisco Security IntelliShield Alert Manager Service. This customizable threat and vulnerability alert service provides security staff with access to timely, accurate, and credible information about threats and vulnerabilities that may affect their environment.


LEGAL DISCLAIMER
The urgency and severity ratings of this alert are not tailored to individual users; users may value alerts differently based upon their network configurations and circumstances. THE ALERT, AND INFORMATION CONTAINED THEREIN, ARE PROVIDED ON AN "AS IS" BASIS AND DO NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE ALERT, AND INFORMATION CONTAINED THEREIN, OR MATERIALS LINKED FROM THE ALERT, IS AT YOUR OWN RISK. INFORMATION IN THIS ALERT AND ANY RELATED COMMUNICATIONS IS BASED ON OUR KNOWLEDGE AT THE TIME OF PUBLICATION AND IS SUBJECT TO CHANGE WITHOUT NOTICE. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE ALERTS AT ANY TIME.
Powered by  IntelliShield