3271 : S/Key Weak Password Implementation
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Info

Last Modified

9 months ago

Percent Complete

65%

Disclosure

May 01, 1996

Discovery

Unknown

Dates

Exploit

May 01, 1996

Solution

Unknown

Description

S/Key implementations contained a flaw that allowed a remote attacker to gain enough information to launch a trivial brute force attack against a login. The flaw was due to S/Key sending both the user/iteration and seed. By sending the seed along with the user/iteration, it greatly reduces the security provided by the S/Key protocol and allows an attacker relatively trivial effort to compromise the login information.

Classification

Unknown or Incomplete

Solution

Currently, there are no known upgrades, patches, or workarounds available to
correct this issue.

Products

Telcordia Technolgoies

S/Key

All Versions

References

Generic Informational URL: http://www.ietf.org/rfc/rfc1760.txt?number=1760
Other Advisory URL: http://www.attrition.org/security/advisory/l0pht/l0pht.96-05-01.skey_cracker

Credit

Unknown or Incomplete

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