From 82d137a0d8be5edd7243ab4a253b076ceb9f5633 Mon Sep 17 00:00:00 2001 From: delphij Date: Thu, 10 Aug 2017 06:59:26 +0000 Subject: Fix OpenSSH Denial of Service vulnerability. [SA-17:06] Fix VNET kernel panic with asynchronous I/O. [EN-17:07] Approved by: so --- crypto/openssh/auth-passwd.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'crypto') diff --git a/crypto/openssh/auth-passwd.c b/crypto/openssh/auth-passwd.c index 63ccf3c..f6825ec 100644 --- a/crypto/openssh/auth-passwd.c +++ b/crypto/openssh/auth-passwd.c @@ -66,6 +66,8 @@ extern login_cap_t *lc; #define DAY (24L * 60 * 60) /* 1 day in seconds */ #define TWO_WEEKS (2L * 7 * DAY) /* 2 weeks in seconds */ +#define MAX_PASSWORD_LEN 1024 + void disable_forwarding(void) { @@ -87,6 +89,9 @@ auth_password(Authctxt *authctxt, const char *password) static int expire_checked = 0; #endif + if (strlen(password) > MAX_PASSWORD_LEN) + return 0; + #ifndef HAVE_CYGWIN if (pw->pw_uid == 0 && options.permit_root_login != PERMIT_YES) ok = 0; -- cgit v1.1