diff options
Diffstat (limited to 'meta/recipes-core/glibc/glibc/0001-CVE-2017-1000366-Ignore-LD_LIBRARY_PATH-for-AT_SECUR.patch')
| -rw-r--r-- | meta/recipes-core/glibc/glibc/0001-CVE-2017-1000366-Ignore-LD_LIBRARY_PATH-for-AT_SECUR.patch | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/meta/recipes-core/glibc/glibc/0001-CVE-2017-1000366-Ignore-LD_LIBRARY_PATH-for-AT_SECUR.patch b/meta/recipes-core/glibc/glibc/0001-CVE-2017-1000366-Ignore-LD_LIBRARY_PATH-for-AT_SECUR.patch new file mode 100644 index 0000000000..78e9ea9e65 --- /dev/null +++ b/meta/recipes-core/glibc/glibc/0001-CVE-2017-1000366-Ignore-LD_LIBRARY_PATH-for-AT_SECUR.patch @@ -0,0 +1,71 @@ +From 400f170750a4b2c94a2670ca44de166cc5dd6e3b Mon Sep 17 00:00:00 2001 +From: Florian Weimer <fweimer@redhat.com> +Date: Mon, 19 Jun 2017 18:33:26 +0200 +Subject: [PATCH] CVE-2017-1000366: Ignore LD_LIBRARY_PATH for AT_SECURE=1 + programs [BZ #21624] + +LD_LIBRARY_PATH can only be used to reorder system search paths, which +is not useful functionality. + +This makes an exploitable unbounded alloca in _dl_init_paths unreachable +for AT_SECURE=1 programs. + +(cherry picked from commit f6110a8fee2ca36f8e2d2abecf3cba9fa7b8ea7d) + +Upstream-Status: Backport +https://sourceware.org/git/?p=glibc.git;a=commit;h=87bd4186da10371f46e2f1a7bf7c0a45bb04f1ac +https://anonscm.debian.org/cgit/pkg-glibc/glibc.git/commit/?h=stretch&id=2755c57269f24e9d59c22c49788f92515346c1bb + +CVE: CVE-2017-1000366 + +Signed-off-by: George McCollister <george.mccollister@gmail.com> +--- + ChangeLog | 7 +++++++ + NEWS | 1 + + elf/rtld.c | 3 ++- + 3 files changed, 10 insertions(+), 1 deletion(-) + +diff --git a/ChangeLog b/ChangeLog +index 2bdaf69e43..7a999802dd 100644 +--- a/ChangeLog ++++ b/ChangeLog +@@ -1,3 +1,10 @@ ++2017-06-19 Florian Weimer <fweimer@redhat.com> ++ ++ [BZ #21624] ++ CVE-2017-1000366 ++ * elf/rtld.c (process_envvars): Ignore LD_LIBRARY_PATH for ++ __libc_enable_secure. ++ + 2016-12-31 Florian Weimer <fweimer@redhat.com> + + [BZ #18784] +diff --git a/NEWS b/NEWS +index 4b1ca3cb65..66b49dbbc0 100644 +--- a/NEWS ++++ b/NEWS +@@ -17,6 +17,7 @@ using `glibc' in the "product" field. + question type which is outside the range of valid question type values. + (CVE-2015-5180) + ++ [21624] Unsafe alloca allows local attackers to alias stack and heap (CVE-2017-1000366) + Version 2.24 + + * The minimum Linux kernel version that this version of the GNU C Library +diff --git a/elf/rtld.c b/elf/rtld.c +index 647661ca45..215a9aec8f 100644 +--- a/elf/rtld.c ++++ b/elf/rtld.c +@@ -2437,7 +2437,8 @@ process_envvars (enum mode *modep) + + case 12: + /* The library search path. */ +- if (memcmp (envline, "LIBRARY_PATH", 12) == 0) ++ if (!__libc_enable_secure ++ && memcmp (envline, "LIBRARY_PATH", 12) == 0) + { + library_path = &envline[13]; + break; +-- +2.15.0 + |