package/glibc/2.22/0003-fix-CVE-2016-3075.patch

   1 From 883dceebc8f11921a9890211a4e202e5be17562f Mon Sep 17 00:00:00 2001
   2 From: Florian Weimer <fweimer@redhat.com>
   3 Date: Tue, 29 Mar 2016 12:57:56 +0200
   4 Subject: [PATCH 1/1] CVE-2016-3075: Stack overflow in _nss_dns_getnetbyname_r [BZ #19879]
   5
   6 The defensive copy is not needed because the name may not alias the
   7 output buffer.
   8
   9 (cherry picked from commit 317b199b4aff8cfa27f2302ab404d2bb5032b9a4)
  10
  11 Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
  12 (downloaded from upstream git repo and removed changes to Changelog:
  13  https://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=883dceebc8f11921a9890211a4e202e5be17562f;hp=5a1a5f0dd2744044801c91bf2588444c29cda533)
  14 ---
  15  ChangeLog                    |    7 +++++++
  16  resolv/nss_dns/dns-network.c |    5 +----
  17  2 files changed, 8 insertions(+), 4 deletions(-)
  18
  19 diff --git a/resolv/nss_dns/dns-network.c b/resolv/nss_dns/dns-network.c
  20 index 00f4490..89f8783 100644
  21 --- a/resolv/nss_dns/dns-network.c
  22 +++ b/resolv/nss_dns/dns-network.c
  23 @@ -118,17 +118,14 @@ _nss_dns_getnetbyname_r (const char *name, struct netent *result,
  24    } net_buffer;
  25    querybuf *orig_net_buffer;
  26    int anslen;
  27 -  char *qbuf;
  28    enum nss_status status;
  29
  30    if (__res_maybe_init (&_res, 0) == -1)
  31      return NSS_STATUS_UNAVAIL;
  32
  33 -  qbuf = strdupa (name);
  34 -
  35    net_buffer.buf = orig_net_buffer = (querybuf *) alloca (1024);
  36
  37 -  anslen = __libc_res_nsearch (&_res, qbuf, C_IN, T_PTR, net_buffer.buf->buf,
  38 +  anslen = __libc_res_nsearch (&_res, name, C_IN, T_PTR, net_buffer.buf->buf,
  39                                1024, &net_buffer.ptr, NULL, NULL, NULL, NULL);
  40    if (anslen < 0)
  41      {
  42 --
  43 1.7.1
  44