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01/01: gnu: libtasn1: Fix CVE-2017-6891.
From: |
Leo Famulari |
Subject: |
01/01: gnu: libtasn1: Fix CVE-2017-6891. |
Date: |
Wed, 24 May 2017 17:03:29 -0400 (EDT) |
lfam pushed a commit to branch master
in repository guix.
commit ff51a87cae360334ed42c79c3e4e46fb7c121eb2
Author: Leo Famulari <address@hidden>
Date: Wed May 24 16:25:54 2017 -0400
gnu: libtasn1: Fix CVE-2017-6891.
* gnu/packages/patches/libtasn1-CVE-2017-6891.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.
* gnu/packages/tls.scm (libtasn1)[replacement]: New field.
(libtasn1/fixed): New variable.
---
gnu/local.mk | 3 +-
gnu/packages/patches/libtasn1-CVE-2017-6891.patch | 51 +++++++++++++++++++++++
gnu/packages/tls.scm | 10 +++++
3 files changed, 63 insertions(+), 1 deletion(-)
diff --git a/gnu/local.mk b/gnu/local.mk
index 16b80fd..178ad35 100644
--- a/gnu/local.mk
+++ b/gnu/local.mk
@@ -744,7 +744,8 @@ dist_patch_DATA =
\
%D%/packages/patches/libsndfile-CVE-2017-8361-8363-8365.patch \
%D%/packages/patches/libsndfile-CVE-2017-8362.patch \
%D%/packages/patches/libssh2-fix-build-failure-with-gcrypt.patch \
- %D%/packages/patches/libtar-CVE-2013-4420.patch \
+ %D%/packages/patches/libtar-CVE-2013-4420.patch \
+ %D%/packages/patches/libtasn1-CVE-2017-6891.patch \
%D%/packages/patches/libtheora-config-guess.patch \
%D%/packages/patches/libtiff-CVE-2016-10092.patch \
%D%/packages/patches/libtiff-CVE-2016-10093.patch \
diff --git a/gnu/packages/patches/libtasn1-CVE-2017-6891.patch
b/gnu/packages/patches/libtasn1-CVE-2017-6891.patch
new file mode 100644
index 0000000..1f847ed
--- /dev/null
+++ b/gnu/packages/patches/libtasn1-CVE-2017-6891.patch
@@ -0,0 +1,51 @@
+Fix CVE-2017-6891:
+
+https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-6891
+
+Patch copied from upstream source repository:
+
+https://git.savannah.gnu.org/cgit/libtasn1.git/commit/?id=5520704d075802df25ce4ffccc010ba1641bd484
+
+From 5520704d075802df25ce4ffccc010ba1641bd484 Mon Sep 17 00:00:00 2001
+From: Nikos Mavrogiannopoulos <address@hidden>
+Date: Thu, 18 May 2017 18:03:34 +0200
+Subject: [PATCH] asn1_find_node: added safety check on asn1_find_node()
+
+This prevents a stack overflow in asn1_find_node() which
+is triggered by too long variable names in the definitions
+files. That means that applications have to deliberately
+pass a too long 'name' constant to asn1_write_value()
+and friends. Reported by Jakub Jirasek.
+
+Signed-off-by: Nikos Mavrogiannopoulos <address@hidden>
+---
+ lib/parser_aux.c | 6 ++++++
+ 1 file changed, 6 insertions(+)
+
+diff --git a/lib/parser_aux.c b/lib/parser_aux.c
+index b4a7370..976ab38 100644
+--- a/lib/parser_aux.c
++++ b/lib/parser_aux.c
+@@ -120,6 +120,9 @@ asn1_find_node (asn1_node pointer, const char *name)
+ if (n_end)
+ {
+ nsize = n_end - n_start;
++ if (nsize >= sizeof(n))
++ return NULL;
++
+ memcpy (n, n_start, nsize);
+ n[nsize] = 0;
+ n_start = n_end;
+@@ -158,6 +161,9 @@ asn1_find_node (asn1_node pointer, const char *name)
+ if (n_end)
+ {
+ nsize = n_end - n_start;
++ if (nsize >= sizeof(n))
++ return NULL;
++
+ memcpy (n, n_start, nsize);
+ n[nsize] = 0;
+ n_start = n_end;
+--
+2.13.0
+
diff --git a/gnu/packages/tls.scm b/gnu/packages/tls.scm
index d505340..9f8c070 100644
--- a/gnu/packages/tls.scm
+++ b/gnu/packages/tls.scm
@@ -52,6 +52,7 @@
(define-public libtasn1
(package
(name "libtasn1")
+ (replacement libtasn1/fixed)
(version "4.10")
(source
(origin
@@ -72,6 +73,15 @@ networking, allowing for formal validation of data according
to some
specifications.")
(license license:lgpl2.0+)))
+(define libtasn1/fixed
+ (package
+ (inherit libtasn1)
+ (source
+ (origin
+ (inherit (package-source libtasn1))
+ (patches
+ (search-patches "libtasn1-CVE-2017-6891.patch"))))))
+
(define-public asn1c
(package
(name "asn1c")