Specifications

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Caveats for Cisco IOS Release 12.0

78-6455-12

Basic System Services

• CSCds13085

A Cisco 7500 series router running Route Switch Processor (RSP1) and Cisco IOS

Release 12.0(10) may experience the following reload and spurious alignments:

System was restarted by bus error at PC 0x601B72E8, address 0x40000060 RSP Software

(RSP-DSV-M), Version 12.0(10), RELEASE SOFTWARE (fc1) Image text-base: 0x60010930,

data-base: 0x60D52000

Stack trace from system failure: FP: 0x613576E0, RA: 0x601B72E8 FP: 0x61357850, RA:

0x6029F13C FP: 0x613578D0, RA: 0x6026E790 FP: 0x61357A08, RA: 0x6029F13C

RSP Software (RSP-DSV-M), Version 12.0(10), RELEASE SOFTWARE (fc1)

Address Count Traceback 37C 1 0x605E95BC 0x60604B10 0x60604BF0 0x60605268 0x606053F4

0x60250104 0x602500F0 14 1 0x601B72DC 0x6029F13C 0x6026E790

There is no workaround.

• CSCds17029

A Cisco 2509 router running Cisco IOS Release 12.0(12) that is configured as an access server may

experience a buffer leak in big buffers:

Big buffers, 1524 bytes (total 1030, permanent 50): 0 in free list (5 min, 150 max

allowed) 1056 hits, 376 misses, 0 trims, 980 created 42 failures (0 no memory)

The router runs short of I/O memory and has to be reloaded. There is no workaround.

• CSCds20054

A Cisco 7200 series router running Cisco IOS Release 12.0(12) may experience a software-forced

reload. There is no workaround.

• CSCds31059

A Cisco 7500 series running Cisco IOS Release 12.0(11) images produces the following error

message:

RSP-2-QAERROR: reused or zero link errors.

The problem occurs infrequently and is only related to using PA-2FEISL as two port FE adapter,

which is not recommended.

There is no workaround.

• CSCds45910

A Route Switch Processor version 2 (RSP2) running Cisco IOS Release 12.0(9) may experience a

buffer leak in the middle buffers. This buffer leak may cause the router to hang when the router runs

out of memory. There is no workaround.

• CSCdr91706

A defect in multiple releases of Cisco IOS software will cause a Cisco router or switch to halt and

reload if the IOS HTTP service is enabled and browsing to

“<code>http://router-hostname-or-IP-address/more-text?/

</code>” is attempted, and the enable password is supplied when requested. This defect can

be exploited to produce a denial of service (DoS) attack.

This is not the same defect as CSCdr36952.

The vulnerability, identified as Cisco Bug ID CSCdr91706, affects virtually all mainstream Cisco

routers and switches running Cisco IOS software Releases 12.0 through 12.1, inclusive. The

vulnerability has been corrected and Cisco is making fixed releases available for free to replace all

affected Cisco IOS releases. Customers are urged to upgrade to releases that are not vulnerable to

this defect.

This vulnerability can be exploited only if the enable password is known or is not set.