From 796e4197f696261c1f872d7576371232330bcc30 Mon Sep 17 00:00:00 2001 From: Simon Josefsson Date: Fri, 15 Jul 2022 16:23:58 +0200 Subject: [PATCH] GSSAPI server: Boundary check gss_wrap token (read OOB). --- lib/gssapi/server.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/lib/gssapi/server.c b/lib/gssapi/server.c index 5410360b..4ebfda47 100644 --- a/lib/gssapi/server.c +++ b/lib/gssapi/server.c @@ -218,6 +218,9 @@ _gsasl_gssapi_server_step (Gsasl_session * sctx, FALSE, and responds with the generated output_message. The client can then consider the server authenticated. */ + if (bufdesc2.length < 4) + return GSASL_AUTHENTICATION_ERROR; + if ((((char *) bufdesc2.value)[0] & GSASL_QOP_AUTH) == 0) { /* Integrity or privacy unsupported */ -- GitLab