The passwordCheck function in SAP Router 721 patch 117, 720 patch 411, 710 patch 029, and earlier terminates validation of a Route Permission Table entry password upon encountering the first incorrect character, which allows remote attackers to obtain passwords via a brute-force attack that relies on timing differences in responses to incorrect password guesses, aka a timing side-channel attack.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Router | Sap | 710-029 (including) | 710-029 (including) |
| Router | Sap | 720-411 (including) | 720-411 (including) |
| Router | Sap | 721-117 (including) | 721-117 (including) |
References
- http://scn.sap.com/docs/DOC-8218
- http://www.coresecurity.com/advisories/sap-router-password-timing-attack
- http://www.exploit-db.com/exploits/32919
- http://www.securityfocus.com/archive/1/531854/100/0/threaded
- https://service.sap.com/sap/support/notes/1986895
- http://scn.sap.com/docs/DOC-8218
- http://www.coresecurity.com/advisories/sap-router-password-timing-attack
- http://www.exploit-db.com/exploits/32919
- http://www.securityfocus.com/archive/1/531854/100/0/threaded
- https://service.sap.com/sap/support/notes/1986895