39 lines
1.2 KiB
Diff
39 lines
1.2 KiB
Diff
From 226b46770c82899b555986583294b049c6ec9b40 Mon Sep 17 00:00:00 2001
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From: Florian Weimer <fweimer@redhat.com>
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Date: Mon, 17 Jan 2022 10:21:34 +0100
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Subject: [PATCH] CVE-2022-23219: Buffer overflow in sunrpc clnt_create for
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"unix" (bug 22542)
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Processing an overlong pathname in the sunrpc clnt_create function
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results in a stack-based buffer overflow.
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Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
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---
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sunrpc/clnt_gen.c | 10 +++++++---
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1 files changed, 6 insertions(+), 4 deletions(-)
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diff --git a/sunrpc/clnt_gen.c b/sunrpc/clnt_gen.c
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index 13ced89..b44357c 100644
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--- a/sunrpc/clnt_gen.c
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+++ b/sunrpc/clnt_gen.c
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@@ -57,9 +57,13 @@ clnt_create (const char *hostname, u_long prog, u_long vers,
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if (strcmp (proto, "unix") == 0)
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{
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- memset ((char *)&sun, 0, sizeof (sun));
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- sun.sun_family = AF_UNIX;
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- strcpy (sun.sun_path, hostname);
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+ if (__sockaddr_un_set (&sun, hostname) < 0)
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+ {
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+ struct rpc_createerr *ce = &get_rpc_createerr ();
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+ ce->cf_stat = RPC_SYSTEMERROR;
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+ ce->cf_error.re_errno = errno;
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+ return NULL;
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+ }
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sock = RPC_ANYSOCK;
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client = clntunix_create (&sun, prog, vers, &sock, 0, 0);
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if (client == NULL)
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--
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1.8.3.1
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