Cisco IOS OSPF Neighbor Buffer Overflow Vulnerability

Risk
High

Date Discovered
02-20-2003

Description
Cisco IOS is prone to a remotely exploitable buffer overflow condition when handling malformed OSPF (Open Shortest Path First) packets. The overflow occurs when more than 255 OSPF neighbors are announced. This may make it possible to execute malicious instructions on a device running a vulnerable version of the software. Denial of service is also possible.

This issue corresponds to Cisco Bug ID CSCdp58462.

Components Affected
Cisco IOS 11.1 IA
Cisco IOS 11.1 CT
Cisco IOS 11.1 CC
Cisco IOS 11.1 CA
Cisco IOS 11.1 AA
Cisco IOS 11.1 (36)CC4
Cisco IOS 11.1 (36)CC2
Cisco IOS 11.1 (36)CA2
Cisco IOS 11.1 (28a)IA
Cisco IOS 11.1 (28a)CT
Cisco IOS 11.1 (24b)
Cisco IOS 11.1 (24a)
Cisco IOS 11.1 (20)AA4
Cisco IOS 11.1
Cisco IOS 11.1.7 CA
Cisco IOS 11.1.7 AA
Cisco IOS 11.1.9 IA
Cisco IOS 11.1.13 IA
Cisco IOS 11.1.13 CA
Cisco IOS 11.1.13 AA
Cisco IOS 11.1.13
Cisco IOS 11.1.15 IA
Cisco IOS 11.1.15 CA
Cisco IOS 11.1.15 AA
Cisco IOS 11.1.16 IA
Cisco IOS 11.1.16 AA
Cisco IOS 11.1.17 CT
Cisco IOS 11.1.17 CC
Cisco IOS 11.2 XA
Cisco IOS 11.2 WA4
Cisco IOS 11.2 WA3
Cisco IOS 11.2 SA
Cisco IOS 11.2 P
Cisco IOS 11.2 GS
Cisco IOS 11.2 F
Cisco IOS 11.2 BC
Cisco IOS 11.2 (9)XA
Cisco IOS 11.2 (8.9)SA6
Cisco IOS 11.2 (4)XAf
Cisco IOS 11.2 (4)XA
Cisco IOS 11.2 (4)
Cisco IOS 11.2 (26b)
Cisco IOS 11.2 (26a)
Cisco IOS 11.2 (26)P2
Cisco IOS 11.2 (26)P2
Cisco IOS 11.2 (23a)BC1
Cisco IOS 11.2 (19a)GS6
Cisco IOS 11.2 (19)GS0.2
Cisco IOS 11.2 (17)
Cisco IOS 11.2 (11b)T2
Cisco IOS 11.2
Cisco IOS 11.2.4 F1
Cisco IOS 11.2.4 F
Cisco IOS 11.2.8 SA5
Cisco IOS 11.2.8 SA3
Cisco IOS 11.2.8 SA1
Cisco IOS 11.2.8 P
Cisco IOS 11.2.9 XA
Cisco IOS 11.2.9 P
Cisco IOS 11.2.10 BC
Cisco IOS 11.3 XA
Cisco IOS 11.3 WA4
Cisco IOS 11.3 T
Cisco IOS 11.3 NA
Cisco IOS 11.3 MA
Cisco IOS 11.3 HA
Cisco IOS 11.3 DB
Cisco IOS 11.3 DA
Cisco IOS 11.3 AA
Cisco IOS 11.3 (8)DB2
Cisco IOS 11.3 (7)DB1
Cisco IOS 11.3 (2)XA
Cisco IOS 11.3 (11c)
Cisco IOS 11.3 (11b)T2
Cisco IOS 11.3 (11b)
Cisco IOS 11.3
Cisco IOS 11.3.1 T
Cisco IOS 11.3.1 ED
Cisco IOS 11.3.11 b
Cisco IOS 12.0 XW
Cisco IOS 12.0 XV
Cisco IOS 12.0 XU
Cisco IOS 12.0 XS
Cisco IOS 12.0 XR
Cisco IOS 12.0 XQ
Cisco IOS 12.0 XP
Cisco IOS 12.0 XN
Cisco IOS 12.0 XM
Cisco IOS 12.0 XL
Cisco IOS 12.0 XK
Cisco IOS 12.0 XJ
Cisco IOS 12.0 XI
Cisco IOS 12.0 XH
Cisco IOS 12.0 XG
Cisco IOS 12.0 XF
Cisco IOS 12.0 XE
Cisco IOS 12.0 XD
Cisco IOS 12.0 XC
Cisco IOS 12.0 XB
Cisco IOS 12.0 XA
Cisco IOS 12.0 WX
Cisco IOS 12.0 WT
Cisco IOS 12.0 WC
Cisco IOS 12.0 WC
Cisco IOS 12.0 WC
Cisco IOS 12.0 W5
Cisco IOS 12.0 T
Cisco IOS 12.0 SX
Cisco IOS 12.0 ST
Cisco IOS 12.0 SP
Cisco IOS 12.0 SL
Cisco IOS 12.0 SC
Cisco IOS 12.0 S
Cisco IOS 12.0 DC
Cisco IOS 12.0 DB
Cisco IOS 12.0 DA
Cisco IOS 12.0 (9a)
Cisco IOS 12.0 (9)S8
Cisco IOS 12.0 (9)S
Cisco IOS 12.0 (9)
Cisco IOS 12.0 (8a)
Cisco IOS 12.0 (8.3)SC
Cisco IOS 12.0 (8.0.2)S
Cisco IOS 12.0 (8)S1
Cisco IOS 12.0 (8)S1
Cisco IOS 12.0 (8)
Cisco IOS 12.0 (7a)
Cisco IOS 12.0 (7.4)S
Cisco IOS 12.0 (7)XV
Cisco IOS 12.0 (7)XK3
Cisco IOS 12.0 (7)XK
Cisco IOS 12.0 (7)XF1
Cisco IOS 12.0 (7)XF
Cisco IOS 12.0 (7)XE2
Cisco IOS 12.0 (7)XE
Cisco IOS 12.0 (7)WX5(15a)
Cisco IOS 12.0 (7)T2
Cisco IOS 12.0 (7)T
Cisco IOS 12.0 (7)SC
Cisco IOS 12.0 (7)S1
Cisco IOS 12.0 (7)DC1
Cisco IOS 12.0 (7)DB2
Cisco IOS 12.0 (6b)
Cisco IOS 12.0 (5.4)WC1
Cisco IOS 12.0 (5.3)WC1
Cisco IOS 12.0 (5.2)XU
Cisco IOS 12.0 (5.1)XP
Cisco IOS 12.0 (5)YB4
Cisco IOS 12.0 (5)XU
Cisco IOS 12.0 (5)XS?
Cisco IOS 12.0 (5)XS
Cisco IOS 12.0 (5)XN1
Cisco IOS 12.0 (5)XN
Cisco IOS 12.0 (5)XK2
Cisco IOS 12.0 (5)XK
Cisco IOS 12.0 (5)XK
Cisco IOS 12.0 (5)XE?
Cisco IOS 12.0 (5)XE
Cisco IOS 12.0 (5)XE
Cisco IOS 12.0 (5)XE
Cisco IOS 12.0 (5)WX
Cisco IOS 12.0 (5)WC3b
Cisco IOS 12.0 (5)WC3
Cisco IOS 12.0 (5)WC3
Cisco IOS 12.0 (5)WC2b
Cisco IOS 12.0 (5)WC2b
Cisco IOS 12.0 (5)WC2
Cisco IOS 12.0 (5)WC2
Cisco IOS 12.0 (5)WC2
Cisco IOS 12.0 (5)WC 2900XL-LRE
Cisco IOS 12.0 (5)T1
Cisco IOS 12.0 (5)T
Cisco IOS 12.0 (4)XM1
Cisco IOS 12.0 (4)XM
Cisco IOS 12.0 (4)XE1
Cisco IOS 12.0 (4)XE
Cisco IOS 12.0 (3d)
Cisco IOS 12.0 (3)
Cisco IOS 12.0 (2b)
Cisco IOS 12.0 (2)XE?
Cisco IOS 12.0 (2)XE
Cisco IOS 12.0 (18b)
Cisco IOS 12.0 (18)W5(22b)
Cisco IOS 12.0 (18)W5(22b)
Cisco IOS 12.0 (18)ST1
Cisco IOS 12.0 (18)S5
Cisco IOS 12.0 (18)S
Cisco IOS 12.0 (17a)
Cisco IOS 12.0 (17)ST5
Cisco IOS 12.0 (17)ST1
Cisco IOS 12.0 (17)SL6
Cisco IOS 12.0 (17)SL2
Cisco IOS 12.0 (17)S4
Cisco IOS 12.0 (17)S
Cisco IOS 12.0 (17)
Cisco IOS 12.0 (16a)
Cisco IOS 12.0 (16.06)S
Cisco IOS 12.0 (16)W5(21)
Cisco IOS 12.0 (16)ST1
Cisco IOS 12.0 (16)SC3
Cisco IOS 12.0 (16)S8
Cisco IOS 12.0 (15a)
Cisco IOS 12.0 (15)S6
Cisco IOS 12.0 (15)S3
Cisco IOS 12.0 (14a)
Cisco IOS 12.0 (14)W5(20)
Cisco IOS 12.0 (14)ST3
Cisco IOS 12.0 (14)ST
Cisco IOS 12.0 (14)S7
Cisco IOS 12.0 (13a)
Cisco IOS 12.0 (13)WT6(1)
Cisco IOS 12.0 (13)W5(19c)
Cisco IOS 12.0 (13)S6
Cisco IOS 12.0 (12a)
Cisco IOS 12.0 (12)S3
Cisco IOS 12.0 (12)S3
Cisco IOS 12.0 (11a)
Cisco IOS 12.0 (11)ST4
Cisco IOS 12.0 (11)S6
Cisco IOS 12.0 (10a)
Cisco IOS 12.0 (10)W5(18g)
Cisco IOS 12.0 (10)W5(18f)
Cisco IOS 12.0 (10)W5
Cisco IOS 12.0 (10)S7
Cisco IOS 12.0
Cisco IOS 12.0.1 XE
Cisco IOS 12.0.1 XB
Cisco IOS 12.0.1 XA3
Cisco IOS 12.0.1 W
Cisco IOS 12.0.1
Cisco IOS 12.0.2 XG
Cisco IOS 12.0.2 XF
Cisco IOS 12.0.2 XD
Cisco IOS 12.0.2 XC
Cisco IOS 12.0.2
Cisco IOS 12.0.3 T2
Cisco IOS 12.0.4 T
Cisco IOS 12.0.4 S
Cisco IOS 12.0.7 (T)

Recommendations
Use access control lists to enhance security.
Use access control lists to restrict access from unauthorized networks and hosts.

The vendor has assigned Cisco Bug ID CSCdp58462 to this issue. The vendor has fixed this issue in Cisco IOS versions 12.0(19)S, 12.0(19)ST, 12.1(1), 12.1(1)DB, 12.1(1)DC, 12.1(1)T and later.

Cisco customers should contact the vendor for details on obtaining fixes.


Cisco IOS 11.1 IA:
Cisco IOS 11.1 CT:
Cisco IOS 11.1 CC:
Cisco IOS 11.1 CA:
Cisco IOS 11.1 AA:
Cisco IOS 11.1 (36)CC4:
Cisco IOS 11.1 (36)CC2:
Cisco IOS 11.1 (36)CA2:
Cisco IOS 11.1 (28a)IA:
Cisco IOS 11.1 (28a)CT:
Cisco IOS 11.1 (24b):
Cisco IOS 11.1 (24a):
Cisco IOS 11.1 (20)AA4:
Cisco IOS 11.1:
Cisco IOS 11.1.7 CA:
Cisco IOS 11.1.7 AA:
Cisco IOS 11.1.9 IA:
Cisco IOS 11.1.13 IA:
Cisco IOS 11.1.13 CA:
Cisco IOS 11.1.13 AA:
Cisco IOS 11.1.13:
Cisco IOS 11.1.15 IA:
Cisco IOS 11.1.15 CA:
Cisco IOS 11.1.15 AA:
Cisco IOS 11.1.16 IA:
Cisco IOS 11.1.16 AA:
Cisco IOS 11.1.17 CT:
Cisco IOS 11.1.17 CC:
Cisco IOS 11.2 XA:
Cisco IOS 11.2 WA4:
Cisco IOS 11.2 WA3:
Cisco IOS 11.2 SA:
Cisco IOS 11.2 P:
Cisco IOS 11.2 GS:
Cisco IOS 11.2 F:
Cisco IOS 11.2 BC:
Cisco IOS 11.2 (9)XA:
Cisco IOS 11.2 (8.9)SA6:
Cisco IOS 11.2 (4)XAf:
Cisco IOS 11.2 (4)XA:
Cisco IOS 11.2 (4):
Cisco IOS 11.2 (26b):
Cisco IOS 11.2 (26a):
Cisco IOS 11.2 (26)P2:
Cisco IOS 11.2 (26)P2:
Cisco IOS 11.2 (23a)BC1:
Cisco IOS 11.2 (19a)GS6:
Cisco IOS 11.2 (19)GS0.2:
Cisco IOS 11.2 (17):
Cisco IOS 11.2 (11b)T2:
Cisco IOS 11.2:
Cisco IOS 11.2.4 F1:
Cisco IOS 11.2.4 F:
Cisco IOS 11.2.8 SA5:
Cisco IOS 11.2.8 SA3:
Cisco IOS 11.2.8 SA1:
Cisco IOS 11.2.8 P:
Cisco IOS 11.2.9 XA:
Cisco IOS 11.2.9 P:
Cisco IOS 11.2.10 BC:
Cisco IOS 11.3 XA:
Cisco IOS 11.3 WA4:
Cisco IOS 11.3 T:
Cisco IOS 11.3 NA:
Cisco IOS 11.3 MA:
Cisco IOS 11.3 HA:
Cisco IOS 11.3 DB:
Cisco IOS 11.3 DA:
Cisco IOS 11.3 AA:
Cisco IOS 11.3 (8)DB2:
Cisco IOS 11.3 (7)DB1:
Cisco IOS 11.3 (2)XA:
Cisco IOS 11.3 (11c):
Cisco IOS 11.3 (11b)T2:
Cisco IOS 11.3 (11b):
Cisco IOS 11.3:
Cisco IOS 11.3.1 T:
Cisco IOS 11.3.1 ED:
Cisco IOS 11.3.11 b:
Cisco IOS 12.0 XW:
Cisco IOS 12.0 XV:
Cisco IOS 12.0 XU:
Cisco IOS 12.0 XS:
Cisco IOS 12.0 XR:
Cisco IOS 12.0 XQ:
Cisco IOS 12.0 XP:
Cisco IOS 12.0 XN:
Cisco IOS 12.0 XM:
Cisco IOS 12.0 XL:
Cisco IOS 12.0 XK:
Cisco IOS 12.0 XJ:
Cisco IOS 12.0 XI:
Cisco IOS 12.0 XH:
Cisco IOS 12.0 XG:
Cisco IOS 12.0 XF:
Cisco IOS 12.0 XE:
Cisco IOS 12.0 XD:
Cisco IOS 12.0 XC:
Cisco IOS 12.0 XB:
Cisco IOS 12.0 XA:
Cisco IOS 12.0 WX:
Cisco IOS 12.0 WT:
Cisco IOS 12.0 WC:
Cisco IOS 12.0 WC:
Cisco IOS 12.0 WC:
Cisco IOS 12.0 W5:
Cisco IOS 12.0 T:
Cisco IOS 12.0 SX:
Cisco IOS 12.0 ST:
Cisco IOS 12.0 SP:
Cisco IOS 12.0 SL:
Cisco IOS 12.0 SC:
Cisco IOS 12.0 S:
Cisco IOS 12.0 DC:
Cisco IOS 12.0 DB:
Cisco IOS 12.0 DA:
Cisco IOS 12.0 (9a):
Cisco IOS 12.0 (9)S8:
Cisco IOS 12.0 (9)S:
Cisco IOS 12.0 (9):
Cisco IOS 12.0 (8a):
Cisco IOS 12.0 (8.3)SC:
Cisco IOS 12.0 (8.0.2)S:
Cisco IOS 12.0 (8)S1:
Cisco IOS 12.0 (8)S1:
Cisco IOS 12.0 (8):
Cisco IOS 12.0 (7a):
Cisco IOS 12.0 (7.4)S:
Cisco IOS 12.0 (7)XV:
Cisco IOS 12.0 (7)XK3:
Cisco IOS 12.0 (7)XK:
Cisco IOS 12.0 (7)XF1:
Cisco IOS 12.0 (7)XF:
Cisco IOS 12.0 (7)XE2:
Cisco IOS 12.0 (7)XE:
Cisco IOS 12.0 (7)WX5(15a):
Cisco IOS 12.0 (7)T2:
Cisco IOS 12.0 (7)T:
Cisco IOS 12.0 (7)SC:
Cisco IOS 12.0 (7)S1:
Cisco IOS 12.0 (7)DC1:
Cisco IOS 12.0 (7)DB2:
Cisco IOS 12.0 (6b):
Cisco IOS 12.0 (5.4)WC1:
Cisco IOS 12.0 (5.3)WC1:
Cisco IOS 12.0 (5.2)XU:
Cisco IOS 12.0 (5.1)XP:
Cisco IOS 12.0 (5)YB4:
Cisco IOS 12.0 (5)XU:
Cisco IOS 12.0 (5)XS?:
Cisco IOS 12.0 (5)XS:
Cisco IOS 12.0 (5)XN1:
Cisco IOS 12.0 (5)XN:
Cisco IOS 12.0 (5)XK2:
Cisco IOS 12.0 (5)XK:
Cisco IOS 12.0 (5)XK:
Cisco IOS 12.0 (5)XE?:
Cisco IOS 12.0 (5)XE:
Cisco IOS 12.0 (5)XE:
Cisco IOS 12.0 (5)XE:
Cisco IOS 12.0 (5)WX:
Cisco IOS 12.0 (5)WC3b:
Cisco IOS 12.0 (5)WC3:
Cisco IOS 12.0 (5)WC3:
Cisco IOS 12.0 (5)WC2b:
Cisco IOS 12.0 (5)WC2b:
Cisco IOS 12.0 (5)WC2:
Cisco IOS 12.0 (5)WC2:
Cisco IOS 12.0 (5)WC2:
Cisco IOS 12.0 (5)WC 2900XL-LRE:
Cisco IOS 12.0 (5)T1:
Cisco IOS 12.0 (5)T:
Cisco IOS 12.0 (4)XM1:
Cisco IOS 12.0 (4)XM:
Cisco IOS 12.0 (4)XE1:
Cisco IOS 12.0 (4)XE:
Cisco IOS 12.0 (3d):
Cisco IOS 12.0 (3):
Cisco IOS 12.0 (2b):
Cisco IOS 12.0 (2)XE?:
Cisco IOS 12.0 (2)XE:
Cisco IOS 12.0 (18b):
Cisco IOS 12.0 (18)W5(22b):
Cisco IOS 12.0 (18)W5(22b):
Cisco IOS 12.0 (18)ST1:
Cisco IOS 12.0 (18)S5:
Cisco IOS 12.0 (18)S:
Cisco IOS 12.0 (17a):
Cisco IOS 12.0 (17)ST5:
Cisco IOS 12.0 (17)ST1:
Cisco IOS 12.0 (17)SL6:
Cisco IOS 12.0 (17)SL2:
Cisco IOS 12.0 (17)S4:
Cisco IOS 12.0 (17)S:
Cisco IOS 12.0 (17):
Cisco IOS 12.0 (16a):
Cisco IOS 12.0 (16.06)S:
Cisco IOS 12.0 (16)W5(21):
Cisco IOS 12.0 (16)ST1:
Cisco IOS 12.0 (16)SC3:
Cisco IOS 12.0 (16)S8:
Cisco IOS 12.0 (15a):
Cisco IOS 12.0 (15)S6:
Cisco IOS 12.0 (15)S3:
Cisco IOS 12.0 (14a):
Cisco IOS 12.0 (14)W5(20):
Cisco IOS 12.0 (14)ST3:
Cisco IOS 12.0 (14)ST:
Cisco IOS 12.0 (14)S7:
Cisco IOS 12.0 (13a):
Cisco IOS 12.0 (13)WT6(1):
Cisco IOS 12.0 (13)W5(19c):
Cisco IOS 12.0 (13)S6:
Cisco IOS 12.0 (12a):
Cisco IOS 12.0 (12)S3:
Cisco IOS 12.0 (12)S3:
Cisco IOS 12.0 (11a):
Cisco IOS 12.0 (11)ST4:
Cisco IOS 12.0 (11)S6:
Cisco IOS 12.0 (10a):
Cisco IOS 12.0 (10)W5(18g):
Cisco IOS 12.0 (10)W5(18f):
Cisco IOS 12.0 (10)W5:
Cisco IOS 12.0 (10)S7:
Cisco IOS 12.0:
Cisco IOS 12.0.1 XE:
Cisco IOS 12.0.1 XB:
Cisco IOS 12.0.1 XA3:
Cisco IOS 12.0.1 W:
Cisco IOS 12.0.1:
Cisco IOS 12.0.2 XG:
Cisco IOS 12.0.2 XF:
Cisco IOS 12.0.2 XD:
Cisco IOS 12.0.2 XC:
Cisco IOS 12.0.2:
Cisco IOS 12.0.3 T2:
Cisco IOS 12.0.4 T:
Cisco IOS 12.0.4 S:
Cisco IOS 12.0.7 (T):

References
Source: Cisco IOS OSPF exploit
URL: msg://bugtraq/20030220164519.GC282@echelon.cluster.phenoelit.de

Source: Re: Cisco IOS OSPF exploit
URL: msg://bugtraq/200302212229.h1LMToD25063@rtp-cse-184.cisco.com

Credits
Discovery of this issue is credited to FX <fx@phenoelit.de>.

Copyright (c) 2003 by Symantec Corp.
Permission to redistribute this alert electronically is granted as long as it is not edited in any way unless authorized by Symantec Security Response. Reprinting the whole or part of this alert in any medium other than electronically requires permission from symsecurity@symantec.com.

Disclaimer
The information in the advisory is believed to be accurate at the time of publishing based on currently available information. Use of the information constitutes acceptance for use in an AS IS condition. There are no warranties with regard to this information. Neither the author nor the publisher accepts any liability for any direct, indirect, or consequential loss or damage arising from use of, or reliance on, this information.

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