Vulnerability Alert

Cisco IOS Software H.323 Remote Denial of Service Vulnerability

 
Threat Type:CWE-399: Resource Management Errors
IntelliShield ID:18885
Version:1
First Published:2009 September 23 16:30 GMT
Last Published:2009 September 23 16:30 GMT
Port: 1720
CVE:CVE-2009-2866
Urgency:Unlikely Use
Credibility:Confirmed
Severity:Mild Damage
CVSS Base:7.8 CVSS Calculator
CVSS Version 2.0
CVSS Temporal:6.4
 
Version Summary:

Cisco IOS Software contains a vulnerability that could allow an unauthenticated, remote attacker to cause a denial of service condition.  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. 

The vulnerability is in the affected device when it handles crafted H.323 packets.  An unauthenticated, remote attacker could exploit this vulnerability by sending crafted H.323 packets to the affected system.  When the device tries to process these packets, an unspecified error could occur that could cause the device to reload, resulting in a DoS condition.

Cisco has confirmed this vulnerability and released updated software.

 
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

Only devices that are configured to process H.323 messages are vulnerable.  H.323 message processing is disabled by default.  Details on how to determine if this feature has been enabled are in the vendor advisory.

Exploitation requires the attacker to complete a three-way TCP handshake.  For this reason the attacker will not be able to spoof the source address of the malicious H.323 packets.

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 to address Cisco bug ID CSCsz38104 at the following link: cisco-sa-20090923-h323

 
Impact

An unauthenticated, remote attacker could exploit this vulnerability to cause a DoS condition on the affected device.  Repeated attacks could result in a persistent DoS condition.

 
Technical Information

The vulnerability is in the H.323 processing component of the affected systems when it handles crafted H.323 packets.  An unauthenticated, remote attacker could exploit this vulnerability by sending a series of crafted H.323 packets to the affected system on TCP port 1720.  When the system tries to process these packets, it may reload, resulting in a DoS condition.

 
Safeguards

Administrators are advised to apply the appropriate updates.

Administrators may consider using IP-based access control lists (ACLs) to allow only trusted systems to access the affected systems on TCP port 1720.

The Cisco Applied Intelligence team has created the following companion document to guide administrators in identifying and mitigating attempts to exploit this vulnerability prior to applying updated software: cisco-amb-20090923-voice

 
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
18479/0H.323 Call Signalling VulnerabilityS4372009 Sep 23 
 
Alert History
 

Initial Release



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

Primary Products:
N/A

Associated Products:
CiscoIOS 12.2B 12.2(15)B, 12.2(15)B1, 12.2(16)B, 12.2(16)B1, 12.2(16)B2, 12.2(16)B3 | 12.2BX 12.2(16)BX, 12.2(16)BX1, 12.2(16)BX2, 12.2(16)BX3 | 12.2CZ 12.2(15)CZ, 12.2(15)CZ1, 12.2(15)CZ2, 12.2(15)CZ3 | 12.2MC 12.2(15)MC1a, 12.2(15)MC1b, 12.2(15)MC1c, 12.2(15)MC2 | 12.2T 12.2(11)T, 12.2(11)T1, 12.2(11)T10, 12.2(11)T11, 12.2(11)T2, 12.2(11)T3, 12.2(11)T4, 12.2(11)T5, 12.2(11)T6, 12.2(11)T7, 12.2(11)T8, 12.2(11)T9, 12.2(13)T, 12.2(13)T1, 12.2(13)T1a, 12.2(13)T10, 12.2(13)T11, 12.2(13)T12, 12.2(13)T13, 12.2(13)T14, 12.2(13)T15, 12.2(13)T16, 12.2(13)T17, 12.2(13)T2, 12.2(13)T3, 12.2(13)T4, 12.2(13)T5, 12.2(13)T6, 12.2(13)T7, 12.2(13)T8, 12.2(13)T8a, 12.2(13)T9, 12.2(15)T, 12.2(15)T1, 12.2(15)T1a, 12.2(15)T10, 12.2(15)T11, 12.2(15)T12, 12.2(15)T12a, 12.2(15)T13, 12.2(15)T14, 12.2(15)T15, 12.2(15)T16, 12.2(15)T17, 12.2(15)T2, 12.2(15)T3, 12.2(15)T4, 12.2(15)T4a, 12.2(15)T4c, 12.2(15)T4d, 12.2(15)T4e, 12.2(15)T5, 12.2(15)T5a, 12.2(15)T6, 12.2(15)T7, 12.2(15)T8, 12.2(15)T9, 12.2(15)T9a | 12.2YH 12.2(4)YH | 12.2YJ 12.2(8)YJ, 12.2(8)YJ1 | 12.2YL 12.2(8)YL | 12.2YM 12.2(8)YM | 12.2YN 12.2(8)YN, 12.2(8)YN1 | 12.2YT 12.2(11)YT, 12.2(11)YT1, 12.2(11)YT2 | 12.2YU 12.2(11)YU | 12.2YV 12.2(11)YV | 12.2ZC 12.2(11)ZC, 12.2(13)ZC | 12.2ZD 12.2(13)ZD, 12.2(13)ZD1, 12.2(13)ZD2, 12.2(13)ZD3, 12.2(13)ZD4 | 12.2ZE 12.2(13)ZE | 12.2ZF 12.2(13)ZF, 12.2(13)ZF1, 12.2(13)ZF2 | 12.2ZH 12.2(13)ZH, 12.2(13)ZH10, 12.2(13)ZH2, 12.2(13)ZH3, 12.2(13)ZH4, 12.2(13)ZH5, 12.2(13)ZH6, 12.2(13)ZH7, 12.2(13)ZH8, 12.2(13)ZH9 | 12.2ZJ 12.2(15)ZJ, 12.2(15)ZJ1, 12.2(15)ZJ2, 12.2(15)ZJ3, 12.2(15)ZJ4, 12.2(15)ZJ5 | 12.2ZK 12.2(15)ZK, 12.2(15)ZK1, 12.2(15)ZK2, 12.2(15)ZK3, 12.2(15)ZK4, 12.2(15)ZK5, 12.2(15)ZK6 | 12.2ZL 12.2(15)ZL, 12.2(15)ZL1 | 12.2ZN 12.2(15)ZN | 12.2ZO 12.2(15)ZO | 12.2ZP 12.2(13)ZP, 12.2(13)ZP1, 12.2(13)ZP2, 12.2(13)ZP3, 12.2(13)ZP4 | 12.2ZR 12.2(15)ZR | 12.2ZS 12.2(15)ZS, 12.2(15)ZS1, 12.2(15)ZS2, 12.2(15)ZS3, 12.2(15)ZS4, 12.2(15)ZS5 | 12.2ZT 12.2(13)ZT | 12.3 12.3(1), 12.3(1a), 12.3(3), 12.3(3a), 12.3(3b), 12.3(3c), 12.3(3d), 12.3(3e), 12.3(3f), 12.3(3g), 12.3(3h), 12.3(3i), 12.3(5), 12.3(5a), 12.3(5b), 12.3(5c), 12.3(5d), 12.3(5e), 12.3(5f), 12.3(6), 12.3(6a), 12.3(6b), 12.3(6c), 12.3(6d), 12.3(6e), 12.3(6f), 12.3(9), 12.3(9a), 12.3(9b), 12.3(9c), 12.3(9d), 12.3(9e), 12.3(10), 12.3(10a), 12.3(10b), 12.3(10c), 12.3(10d), 12.3(10e), 12.3(10f), 12.3(12), 12.3(12a), 12.3(12b), 12.3(12c), 12.3(12d), 12.3(12e), 12.3(13), 12.3(13a), 12.3(13b), 12.3(15), 12.3(15a), 12.3(15b), 12.3(16), 12.3(16a), 12.3(17), 12.3(17a), 12.3(17b), 12.3(17c), 12.3(18), 12.3(18a), 12.3(19), 12.3(19a), 12.3(20), 12.3(20a), 12.3(21), 12.3(21a), 12.3(21b), 12.3(22), 12.3(22a), 12.3(23), 12.3(24), 12.3(24a), 12.3(25), 12.3(26) | 12.3B 12.3(1a)B, 12.3(3)B, 12.3(3)B1, 12.3(5a)B, 12.3(5a)B0a, 12.3(5a)B1, 12.3(5a)B2, 12.3(5a)B3, 12.3(5a)B4, 12.3(5a)B5 | 12.3M 12.3(9)M0, 12.3(9)M1, 12.3(10a)M0 | 12.3T 12.3(2)T, 12.3(2)T1, 12.3(2)T2, 12.3(2)T3, 12.3(2)T4, 12.3(2)T5, 12.3(2)T6, 12.3(2)T7, 12.3(2)T8, 12.3(2)T9, 12.3(4)T, 12.3(4)T1, 12.3(4)T10, 12.3(4)T11, 12.3(4)T12, 12.3(4)T2, 12.3(4)T2a, 12.3(4)T3, 12.3(4)T4, 12.3(4)T5, 12.3(4)T6, 12.3(4)T7, 12.3(4)T8, 12.3(4)T9, 12.3(7)T, 12.3(7)T1, 12.3(7)T10, 12.3(7)T11, 12.3(7)T12, 12.3(7)T2, 12.3(7)T3, 12.3(7)T4, 12.3(7)T5, 12.3(7)T6, 12.3(7)T7, 12.3(7)T8, 12.3(7)T9, 12.3(8)T, 12.3(8)T1, 12.3(8)T10, 12.3(8)T11, 12.3(8)T2, 12.3(8)T3, 12.3(8)T4, 12.3(8)T5, 12.3(8)T6, 12.3(8)T7, 12.3(8)T8, 12.3(8)T9, 12.3(11)T, 12.3(11)T1, 12.3(11)T10, 12.3(11)T11, 12.3(11)T12, 12.3(11)T2, 12.3(11)T2a, 12.3(11)T3, 12.3(11)T4, 12.3(11)T5, 12.3(11)T6, 12.3(11)T7, 12.3(11)T8, 12.3(11)T9, 12.3(14)T, 12.3(14)T1, 12.3(14)T2, 12.3(14)T3, 12.3(14)T4, 12.3(14)T5, 12.3(14)T6, 12.3(14)T7 | 12.3TPC 12.3(4)TPC11b | 12.3XA 12.3(2)XA, 12.3(2)XA1, 12.3(2)XA4, 12.3(2)XA6 | 12.3XB 12.3(2)XB, 12.3(2)XB1, 12.3(2)XB3 | 12.3XC 12.3(2)XC, 12.3(2)XC1, 12.3(2)XC2, 12.3(2)XC3, 12.3(2)XC5 | 12.3XD 12.3(4)XD, 12.3(4)XD1, 12.3(4)XD2, 12.3(4)XD3, 12.3(4)XD4 | 12.3XE 12.3(2)XE, 12.3(2)XE1, 12.3(2)XE5 | 12.3XF 12.3(2)XF | 12.3XG 12.3(4)XG, 12.3(4)XG1, 12.3(4)XG2, 12.3(4)XG3, 12.3(4)XG4, 12.3(4)XG5 | 12.3XH 12.3(4)XH, 12.3(4)XH1 | 12.3XI 12.3(7)XI, 12.3(7)XI1, 12.3(7)XI10a, 12.3(7)XI2, 12.3(7)XI2b, 12.3(7)XI3, 12.3(7)XI4, 12.3(7)XI5, 12.3(7)XI6, 12.3(7)XI7, 12.3(7)XI7a, 12.3(7)XI7b, 12.3(7)XI8, 12.3(7)XI8bc, 12.3(7)XI8g | 12.3XJ 12.3(7)XJ, 12.3(7)XJ1, 12.3(7)XJ2 | 12.3XK 12.3(4)XK, 12.3(4)XK1, 12.3(4)XK2, 12.3(4)XK3, 12.3(4)XK4 | 12.3XL 12.3(7)XL, 12.3(11)XL, 12.3(11)XL1, 12.3(11)XL2, 12.3(11)XL3 | 12.3XM 12.3(7)XM | 12.3XN 12.3(4)XN, 12.3(4)XN1, 12.3(4)XN2 | 12.3XQ 12.3(4)XQ, 12.3(4)XQ1 | 12.3XR 12.3(7)XR, 12.3(7)XR3, 12.3(7)XR4, 12.3(7)XR5, 12.3(7)XR6, 12.3(7)XR7 | 12.3XU 12.3(8)XU2, 12.3(8)XU3, 12.3(8)XU4, 12.3(8)XU5 | 12.3XW 12.3(8)XW, 12.3(8)XW1, 12.3(8)XW1a, 12.3(8)XW1b, 12.3(8)XW2, 12.3(8)XW3 | 12.3XX 12.3(8)XX, 12.3(8)XX1, 12.3(8)XX2d, 12.3(8)XX2e | 12.3XY 12.3(8)XY, 12.3(8)XY1, 12.3(8)XY2, 12.3(8)XY3, 12.3(8)XY4, 12.3(8)XY5, 12.3(8)XY6, 12.3(8)XY7 | 12.3XZ 12.3(2)XZ1, 12.3(2)XZ2 | 12.3YB 12.3(7)YB, 12.3(7)YB1 | 12.3YC 12.3(8)YC, 12.3(8)YC1, 12.3(8)YC2, 12.3(8)YC3 | 12.3YE 12.3(4)YE, 12.3(4)YE1 | 12.3YF 12.3(11)YF, 12.3(11)YF1, 12.3(11)YF2, 12.3(11)YF3, 12.3(11)YF4 | 12.3YG 12.3(8)YG, 12.3(8)YG2, 12.3(8)YG3, 12.3(8)YG4, 12.3(8)YG6 | 12.3YK 12.3(11)YK, 12.3(11)YK1, 12.3(11)YK2 | 12.3YL 12.3(11)YL, 12.3(11)YL1, 12.3(11)YL2 | 12.3YM 12.3(14)YM1, 12.3(14)YM10, 12.3(14)YM11, 12.3(14)YM12, 12.3(14)YM13, 12.3(14)YM2, 12.3(14)YM3, 12.3(14)YM4, 12.3(14)YM5, 12.3(14)YM6, 12.3(14)YM7, 12.3(14)YM8, 12.3(14)YM9 | 12.3YN 12.3(11)YN | 12.3YQ 12.3(14)YQ, 12.3(14)YQ1, 12.3(14)YQ2, 12.3(14)YQ3, 12.3(14)YQ4, 12.3(14)YQ5, 12.3(14)YQ6, 12.3(14)YQ7, 12.3(14)YQ8 | 12.3YR 12.3(11)YR, 12.3(11)YR1 | 12.3YS 12.3(11)YS2 | 12.3YT 12.3(14)YT, 12.3(14)YT1 | 12.3YU 12.3(14)YU, 12.3(14)YU1 | 12.3YW 12.3(11)YW, 12.3(11)YW1, 12.3(11)YW2 | 12.3YX 12.3(14)YX, 12.3(14)YX1, 12.3(14)YX10, 12.3(14)YX11, 12.3(14)YX12, 12.3(14)YX13, 12.3(14)YX14, 12.3(14)YX15, 12.3(14)YX2, 12.3(14)YX3, 12.3(14)YX4, 12.3(14)YX7, 12.3(14)YX8, 12.3(14)YX9 | 12.3YZ 12.3(11)YZ, 12.3(11)YZ1, 12.3(11)YZ2 | 12.3ZA 12.3(8)ZA, 12.3(8)ZA1 | 12.3ZB 12.3(11)ZB, 12.3(11)ZB1, 12.3(11)ZB2 | 12.4 12.4(1), 12.4(1a), 12.4(1b), 12.4(1c), 12.4(3), 12.4(3a), 12.4(3b), 12.4(3c), 12.4(3d), 12.4(3e), 12.4(3f), 12.4(3g), 12.4(3h), 12.4(3i), 12.4(3j), 12.4(5), 12.4(5a), 12.4(5b), 12.4(5c), 12.4(7), 12.4(7a), 12.4(7b), 12.4(7c), 12.4(7d), 12.4(7e), 12.4(7f), 12.4(7g), 12.4(7h), 12.4(8), 12.4(8a), 12.4(8b), 12.4(8c), 12.4(8d), 12.4(10), 12.4(10a), 12.4(10b), 12.4(10c), 12.4(12), 12.4(12a), 12.4(12b), 12.4(12c), 12.4(13), 12.4(13a), 12.4(13b), 12.4(13c), 12.4(13d), 12.4(13e), 12.4(13f), 12.4(16), 12.4(16a), 12.4(16b), 12.4(17), 12.4(17a), 12.4(17b), 12.4(18), 12.4(18a), 12.4(18b), 12.4(18c), 12.4(18d), 12.4(18e), 12.4(19), 12.4(19a), 12.4(19b), 12.4(21), 12.4(21a), 12.4(23), 12.4(23a), 12.4(25), 12.4(25a) | 12.4GC 12.4(22)GC1 | 12.4M 12.4(5a)M0, 12.4(21a)M1 | 12.4MR 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 | 12.4T 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)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)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(22)T, 12.4(22)T1, 12.4(24)T | 12.4XA 12.4(2)XA, 12.4(2)XA1, 12.4(2)XA2 | 12.4XB 12.4(2)XB, 12.4(2)XB1, 12.4(2)XB10, 12.4(2)XB2, 12.4(2)XB3, 12.4(2)XB4, 12.4(2)XB5, 12.4(2)XB6, 12.4(2)XB7, 12.4(2)XB8, 12.4(2)XB9 | 12.4XC 12.4(4)XC, 12.4(4)XC1, 12.4(4)XC2, 12.4(4)XC3, 12.4(4)XC4, 12.4(4)XC5, 12.4(4)XC6, 12.4(4)XC7 | 12.4XD 12.4(4)XD, 12.4(4)XD1, 12.4(4)XD10, 12.4(4)XD11, 12.4(4)XD12, 12.4(4)XD2, 12.4(4)XD3, 12.4(4)XD4, 12.4(4)XD5, 12.4(4)XD6, 12.4(4)XD7, 12.4(4)XD8, 12.4(4)XD9 | 12.4XE 12.4(6)XE, 12.4(6)XE1, 12.4(6)XE2, 12.4(6)XE3 | 12.4XJ 12.4(11)XJ, 12.4(11)XJ1, 12.4(11)XJ2, 12.4(11)XJ3, 12.4(11)XJ4, 12.4(11)XJ5, 12.4(11)XJ6 | 12.4XL 12.4(15)XL, 12.4(15)XL1, 12.4(15)XL2, 12.4(15)XL3, 12.4(15)XL4, 12.4(15)XL5 | 12.4XM 12.4(15)XM1, 12.4(15)XM2 | 12.4XP 12.4(6)XP | 12.4XT 12.4(6)XT, 12.4(6)XT1, 12.4(6)XT2 | 12.4XV 12.4(11)XV, 12.4(11)XV1 | 12.4XW 12.4(11)XW, 12.4(11)XW1, 12.4(11)XW10, 12.4(11)XW2, 12.4(11)XW3, 12.4(11)XW4, 12.4(11)XW5, 12.4(11)XW6, 12.4(11)XW7, 12.4(11)XW8, 12.4(11)XW9 | 12.4XY 12.4(15)XY, 12.4(15)XY1, 12.4(15)XY2, 12.4(15)XY3, 12.4(15)XY4, 12.4(15)XY5 | 12.4XZ 12.4(15)XZ, 12.4(15)XZ1, 12.4(15)XZ2 | 12.4YA 12.4(20)YA, 12.4(20)YA1, 12.4(20)YA2, 12.4(20)YA3 | 12.4YB 12.4(22)YB, 12.4(22)YB1




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