openssl: fix for CVE-2015-3195

Signed-off-by: Armin Kuster <akuster@mvista.com>
Signed-off-by: Joshua Lock <joshua.g.lock@intel.com>

2 files changed, 67 insertions, 0 deletions

diff --git a/meta/recipes-connectivity/openssl/openssl/CVE-2015-3195-Fix-leak-with-ASN.1-combine.patch b/meta/recipes-connectivity/openssl/openssl/CVE-2015-3195-Fix-leak-with-ASN.1-combine.patch
new file mode 100644
index 0000000000..6fc4d0e839
--- /dev/null
+++ b/meta/recipes-connectivity/openssl/openssl/CVE-2015-3195-Fix-leak-with-ASN.1-combine.patch
@@ -0,0 +1,66 @@
+From cc598f321fbac9c04da5766243ed55d55948637d Mon Sep 17 00:00:00 2001
+From: "Dr. Stephen Henson" <steve@openssl.org>
+Date: Tue, 10 Nov 2015 19:03:07 +0000
+Subject: [PATCH] Fix leak with ASN.1 combine.
+
+When parsing a combined structure pass a flag to the decode routine
+so on error a pointer to the parent structure is not zeroed as
+this will leak any additional components in the parent.
+
+This can leak memory in any application parsing PKCS#7 or CMS structures.
+
+CVE-2015-3195.
+
+Thanks to Adam Langley (Google/BoringSSL) for discovering this bug using
+libFuzzer.
+
+PR#4131
+
+Reviewed-by: Richard Levitte <levitte@openssl.org>
+
+Upstream-Status: Backport
+
+This patch was imported from
+https://git.openssl.org/?p=openssl.git;a=commit;h=cc598f321fbac9c04da5766243ed55d55948637d
+
+Signed-off-by: Armin Kuster <akuster@mvista.com>
+
+---
+ crypto/asn1/tasn_dec.c | 7 +++++--
+ 1 file changed, 5 insertions(+), 2 deletions(-)
+
+diff --git a/crypto/asn1/tasn_dec.c b/crypto/asn1/tasn_dec.c
+index febf605..9256049 100644
+--- a/crypto/asn1/tasn_dec.c
++++ b/crypto/asn1/tasn_dec.c
+@@ -180,6 +180,8 @@ int ASN1_item_ex_d2i(ASN1_VALUE **pval, const unsigned char **in, long len,
+     int otag;
+     int ret = 0;
+     ASN1_VALUE **pchptr, *ptmpval;
++    int combine = aclass & ASN1_TFLG_COMBINE;
++    aclass &= ~ASN1_TFLG_COMBINE;
+     if (!pval)
+         return 0;
+     if (aux && aux->asn1_cb)
+@@ -500,7 +502,8 @@ int ASN1_item_ex_d2i(ASN1_VALUE **pval, const unsigned char **in, long len,
+  auxerr:
+     ASN1err(ASN1_F_ASN1_ITEM_EX_D2I, ASN1_R_AUX_ERROR);
+  err:
+-    ASN1_item_ex_free(pval, it);
++    if (combine == 0)
++        ASN1_item_ex_free(pval, it);
+     if (errtt)
+         ERR_add_error_data(4, "Field=", errtt->field_name,
+                            ", Type=", it->sname);
+@@ -689,7 +692,7 @@ static int asn1_template_noexp_d2i(ASN1_VALUE **val,
+     } else {
+         /* Nothing special */
+         ret = ASN1_item_ex_d2i(val, &p, len, ASN1_ITEM_ptr(tt->item),
+-                               -1, 0, opt, ctx);
++                               -1, tt->flags & ASN1_TFLG_COMBINE, opt, ctx);
+         if (!ret) {
+             ASN1err(ASN1_F_ASN1_TEMPLATE_NOEXP_D2I, ERR_R_NESTED_ASN1_ERROR);
+             goto err;
+-- 
+2.3.5
+
diff --git a/meta/recipes-connectivity/openssl/openssl_1.0.2d.bb b/meta/recipes-connectivity/openssl/openssl_1.0.2d.bb
index 3aae6a66fa..a4e2f67998 100644
--- a/meta/recipes-connectivity/openssl/openssl_1.0.2d.bb
+++ b/meta/recipes-connectivity/openssl/openssl_1.0.2d.bb
@@ -38,6 +38,7 @@ SRC_URI += "file://configure-targets.patch \
             file://CVE-2015-3193-bn-asm-x86_64-mont5.pl-fix-carry-propagating-bug-CVE.patch \
             file://CVE-2015-3194-1-Add-PSS-parameter-check.patch \
             file://0001-Add-test-for-CVE-2015-3194.patch \
+            file://CVE-2015-3195-Fix-leak-with-ASN.1-combine.patch \
            "
 
 SRC_URI[md5sum] = "38dd619b2e77cbac69b99f52a053d25a"