| commit 317b199b4aff8cfa27f2302ab404d2bb5032b9a4 |
| Author: Florian Weimer <fweimer@redhat.com> |
| Date: Tue Mar 29 12:57:56 2016 +0200 |
| |
| CVE-2016-3075: Stack overflow in _nss_dns_getnetbyname_r [BZ #19879] |
| |
| The defensive copy is not needed because the name may not alias the |
| output buffer. |
| |
| diff --git a/resolv/nss_dns/dns-network.c b/resolv/nss_dns/dns-network.c |
| index 2eb2f67..8f301a7 100644 |
| |
| |
| @@ -118,17 +118,14 @@ _nss_dns_getnetbyname_r (const char *name, struct netent *result, |
| } net_buffer; |
| querybuf *orig_net_buffer; |
| int anslen; |
| - char *qbuf; |
| enum nss_status status; |
| |
| if (__res_maybe_init (&_res, 0) == -1) |
| return NSS_STATUS_UNAVAIL; |
| |
| - qbuf = strdupa (name); |
| - |
| net_buffer.buf = orig_net_buffer = (querybuf *) alloca (1024); |
| |
| - anslen = __libc_res_nsearch (&_res, qbuf, C_IN, T_PTR, net_buffer.buf->buf, |
| + anslen = __libc_res_nsearch (&_res, name, C_IN, T_PTR, net_buffer.buf->buf, |
| 1024, &net_buffer.ptr, NULL, NULL, NULL, NULL); |
| if (anslen < 0) |
| { |