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Cisco Bug: CSCum99586 - SSH crashes when RSA pubkey Authentication method is used

Last Modified

Jul 21, 2018

Products (1)

  • Cisco Carrier Routing System

Known Affected Releases

5.1.1.K9SEC

Description (partial)

Internally a NULL string is passed as password and we are not handling this case properly. We were doing some string operation on NULL string.

Symptom:
when user logs in to the XR server using pubkey authentication a crash is seen.

Conditions:
sshd_child_handler crashes everytime pubkey authentication is used.

Related Community Discussions

IOS-XR: RSA Public Key User Authentication で SSH ログインに失敗する
2015年1月21日(初版) TAC SR Collection 主な問題 IOS XR が動作するルータにおいて、RSA Public key User Authentication を使用しており、SSH でログインした場合に sshd_child_handler process が crash し、SSH session が確立しません。 <XR ルータ上の出力例> | dumper[56]: %OS-DUMPER-7-DUMP_REQUEST : Dump request for process pkg/bin/ sshd_child_handler dumper[56]: %OS-DUMPER-6-ERR_SYSMGR_CORE_OPTIONS : Failed to get process core options from the process init/startup file. Error(1132268544): 'sysmgr' detected the 'warning' condition 'No more matching elements available'. ...
Latest activity: Jan 23, 2015
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