package/glibc/2.23/0001-fix-CVE-2016-3075.patch

   1 From 146b58d11fddbef15b888906e3be4f33900c416f 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 (cherry picked from commit 883dceebc8f11921a9890211a4e202e5be17562f)
  11
  12 Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
  13 (downloaded from upstream git repo and removed changes to files
  14  Changelog and NEWS:
  15  https://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=146b58d11fddbef15b888906e3be4f33900c416f;hp=0eb234232eaf925fe4dca3bd60a3e1b4a7ab2882)
  16 ---
  17  ChangeLog                    |    7 +++++++
  18  NEWS                         |   10 ++++++++--
  19  resolv/nss_dns/dns-network.c |    5 +----
  20  3 files changed, 16 insertions(+), 6 deletions(-)
  21
  22 diff --git a/resolv/nss_dns/dns-network.c b/resolv/nss_dns/dns-network.c
  23 index 2eb2f67..8f301a7 100644
  24 --- a/resolv/nss_dns/dns-network.c
  25 +++ b/resolv/nss_dns/dns-network.c
  26 @@ -118,17 +118,14 @@ _nss_dns_getnetbyname_r (const char *name, struct netent *result,
  27    } net_buffer;
  28    querybuf *orig_net_buffer;
  29    int anslen;
  30 -  char *qbuf;
  31    enum nss_status status;
  32
  33    if (__res_maybe_init (&_res, 0) == -1)
  34      return NSS_STATUS_UNAVAIL;
  35
  36 -  qbuf = strdupa (name);
  37 -
  38    net_buffer.buf = orig_net_buffer = (querybuf *) alloca (1024);
  39
  40 -  anslen = __libc_res_nsearch (&_res, qbuf, C_IN, T_PTR, net_buffer.buf->buf,
  41 +  anslen = __libc_res_nsearch (&_res, name, C_IN, T_PTR, net_buffer.buf->buf,
  42                                1024, &net_buffer.ptr, NULL, NULL, NULL, NULL);
  43    if (anslen < 0)
  44      {
  45 --
  46 1.7.1
  47