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From 226b46770c82899b555986583294b049c6ec9b40 Mon Sep 17 00:00:00 2001
From: Florian Weimer <fweimer@redhat.com>
Date: Mon, 17 Jan 2022 10:21:34 +0100
Subject: [PATCH] CVE-2022-23219: Buffer overflow in sunrpc clnt_create for
"unix" (bug 22542)
Processing an overlong pathname in the sunrpc clnt_create function
results in a stack-based buffer overflow.
Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
---
NEWS | 14 ++++++++++++++
sunrpc/clnt_gen.c | 10 +++++++---
2 files changed, 21 insertions(+), 3 deletions(-)
diff --git a/NEWS b/NEWS
index 3c610744..dbe6f086 100644
--- a/NEWS
+++ b/NEWS
@@ -4,6 +4,20 @@ See the end for copying conditions.
Please send GNU C library bug reports via <https://sourceware.org/bugzilla/>
using `glibc' in the "product" field.
+
+^L
+Version 2.34.1
+
+Security related changes:
+
+ CVE-2022-23219: Passing an overlong file name to the clnt_create
+ legacy function could result in a stack-based buffer overflow when
+ using the "unix" protocol. Reported by Martin Sebor.
+
+The following bugs are resolved with this release:
+
+ [22542] CVE-2022-23219: Buffer overflow in sunrpc clnt_create for "unix"
+
Version 2.34
diff --git a/sunrpc/clnt_gen.c b/sunrpc/clnt_gen.c
index 13ced899..b44357cd 100644
--- a/sunrpc/clnt_gen.c
+++ b/sunrpc/clnt_gen.c
@@ -57,9 +57,13 @@ clnt_create (const char *hostname, u_long prog, u_long vers,
if (strcmp (proto, "unix") == 0)
{
- memset ((char *)&sun, 0, sizeof (sun));
- sun.sun_family = AF_UNIX;
- strcpy (sun.sun_path, hostname);
+ if (__sockaddr_un_set (&sun, hostname) < 0)
+ {
+ struct rpc_createerr *ce = &get_rpc_createerr ();
+ ce->cf_stat = RPC_SYSTEMERROR;
+ ce->cf_error.re_errno = errno;
+ return NULL;
+ }
sock = RPC_ANYSOCK;
client = clntunix_create (&sun, prog, vers, &sock, 0, 0);
if (client == NULL)
--
2.27.0
|
