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| author | Florian Weimer <fweimer@redhat.com> | 2016-03-29 12:57:56 +0200 |
|---|---|---|
| committer | Mike Frysinger <vapier@gentoo.org> | 2016-04-04 14:57:53 -0400 |
| commit | 1199943f072f8a0c47d9283bc9d8c1740a38a94e (patch) | |
| tree | cacae5e11eaa1e76f43f0ee628e4a8d4d160477a | |
| parent | b286c83dcbd06314859bf86319782611c81e283d (diff) | |
| download | glibc-1199943f072f8a0c47d9283bc9d8c1740a38a94e.tar.gz glibc-1199943f072f8a0c47d9283bc9d8c1740a38a94e.tar.xz glibc-1199943f072f8a0c47d9283bc9d8c1740a38a94e.zip | |
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. (cherry picked from commit 317b199b4aff8cfa27f2302ab404d2bb5032b9a4) (cherry picked from commit 883dceebc8f11921a9890211a4e202e5be17562f)
| -rw-r--r-- | resolv/nss_dns/dns-network.c | 5 |
1 files changed, 1 insertions, 4 deletions
diff --git a/resolv/nss_dns/dns-network.c b/resolv/nss_dns/dns-network.c index 00f4490c5d..89f8783fbe 100644 --- a/resolv/nss_dns/dns-network.c +++ b/resolv/nss_dns/dns-network.c @@ -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) { |