VULNERABILITY INTELLIGENCE

CVE-2009-4409

CVSS score2.6 NONE
EPSS probability1.36%
CISA KEVNot currently listed
Published2009-12-23
Last modified2026-06-16
CVSS vectorAV:N/AC:H/Au:N/C:N/I:P/A:N

Description

The (1) CHAP and (2) MS-CHAP-V2 authentication capabilities in the PPP Access Concentrator (PPPAC) function in Internet Initiative Japan SEIL/B1 firmware 1.00 through 2.52 use the same challenge for each authentication attempt, which allows remote attackers to bypass authentication via a replay attack.

Weakness classification

  • nvd@nist.gov: CWE-287

Primary references