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From 81e757b7b1d69893b5725f9c148c55d89c779e7b Mon Sep 17 00:00:00 2001
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From: Sumit Bose <sbose@redhat.com>
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Date: Tue, 3 Nov 2020 10:12:15 +0100
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Subject: [PATCH] ifp: fix use-after-free
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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The variable fqdn is pointing to some data from state->res->msgs[0]. But
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before fqdn is used in the next search state->res and the memory
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hierarchy below is freed. As a result the location where fqdn is pointing
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to might hold the expected data or other data and the search will fail
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intermittently.
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Resolves: https://github.com/SSSD/sssd/issues/5382
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Reviewed-by: Pavel Březina <pbrezina@redhat.com>
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---
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src/responder/ifp/ifpsrv_cmd.c | 1 +
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1 file changed, 1 insertion(+)
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diff --git a/src/responder/ifp/ifpsrv_cmd.c b/src/responder/ifp/ifpsrv_cmd.c
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index 9f20bf2db..d95618127 100644
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--- a/src/responder/ifp/ifpsrv_cmd.c
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+++ b/src/responder/ifp/ifpsrv_cmd.c
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@@ -128,6 +128,7 @@ static void ifp_user_get_attr_done(struct tevent_req *subreq)
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tevent_req_error(req, ERR_INTERNAL);
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return;
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}
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+ fqdn = talloc_steal(state, fqdn);
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if (state->search_type == SSS_DP_USER) {
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/* throw away the result and perform attr search */
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--
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2.21.3
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