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| author | Florian Weimer <fweimer@redhat.com> | 2022-01-17 10:21:34 +0100 |
|---|---|---|
| committer | Dmitry V. Levin <ldv@altlinux.org> | 2022-10-04 08:00:00 +0000 |
| commit | 52d57fc76d7df2a39236a782399fb3efff87895d (patch) | |
| tree | 06df27c2dd373bd465116e3f3f660316e868e36e | |
| parent | b10d5e62a6ac7688305772eb64aac3eda87b1623 (diff) | |
| download | glibc-52d57fc76d7df2a39236a782399fb3efff87895d.tar.gz glibc-52d57fc76d7df2a39236a782399fb3efff87895d.tar.xz glibc-52d57fc76d7df2a39236a782399fb3efff87895d.zip | |
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> (cherry picked from commit 226b46770c82899b555986583294b049c6ec9b40)
| -rw-r--r-- | NEWS | 5 | ||||
| -rw-r--r-- | sunrpc/clnt_gen.c | 10 |
2 files changed, 12 insertions, 3 deletions
diff --git a/NEWS b/NEWS index f087aff61e..53ca17db43 100644 --- a/NEWS +++ b/NEWS @@ -38,9 +38,14 @@ Security related changes: parameter number when processing the expansion resulting in a crash. Reported by Philippe Antoine. + 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: [20019] NULL pointer dereference in libc.so.6 IFUNC due to uninitialized GOT + [22542] CVE-2022-23219: Buffer overflow in sunrpc clnt_create for "unix" [24973] locale: iconv encounters segmentation fault when converting 0x00 0xfe in EUC-KR to UTF-8 (CVE-2019-25013) [25399] string: undefined reference to `__warn_memset_zero_len' when diff --git a/sunrpc/clnt_gen.c b/sunrpc/clnt_gen.c index 13ced8994e..b44357cd88 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) |