From 4fa89fc784b87b22bb551e9a8dc754cb2392d732 Mon Sep 17 00:00:00 2001 From: Tom Yu Date: Fri, 13 Mar 2009 21:16:14 +0000 Subject: [PATCH] CVE-2009-0845 SPNEGO can dereference a null pointer acc_ctx_new() can return an error condition without establishing a SPNEGO context structure. This can cause a null pointer dereference in cleanup code in spnego_gss_accept_sec_context(). ticket: 6417 tags: pullup target_version: 1.7 git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@22084 dc483132-0cff-0310-8789-dd5450dbe970 --- src/lib/gssapi/spnego/spnego_mech.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/src/lib/gssapi/spnego/spnego_mech.c b/src/lib/gssapi/spnego/spnego_mech.c index 3a6653caf..708017a8d 100644 --- a/src/lib/gssapi/spnego/spnego_mech.c +++ b/src/lib/gssapi/spnego/spnego_mech.c @@ -1650,7 +1650,8 @@ spnego_gss_accept_sec_context( &negState, &return_token); } cleanup: - if (return_token != NO_TOKEN_SEND && return_token != CHECK_MIC) { + if (return_token == INIT_TOKEN_SEND || + return_token == CONT_TOKEN_SEND) { /* For acceptor-sends-first send a tokenInit */ int tmpret; -- 2.26.2