[PATCH 16/20] openssl: CVE-2015-3194, CVE-2015-3195

Armin Kuster
2016-01-10T00:31:07Z

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From: Sona Sarmadi <sona.sarmadi@enea.com>

Fixes following vulnerabilities:
Certificate verify crash with missing PSS parameter (CVE-2015-3194)
X509_ATTRIBUTE memory leak (CVE-2015-3195)

References:
https://openssl.org/news/secadv/20151203.txt
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-3194
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-3195

Upstream patches:
CVE-2015-3194:
https://git.openssl.org/?p=openssl.git;a=commit;h=
d8541d7e9e63bf5f343af24644046c8d96498c17

CVE-2015-3195:
https://git.openssl.org/?p=openssl.git;a=commit;h=
b29ffa392e839d05171206523e84909146f7a77c

Signed-off-by: Sona Sarmadi <sona.sarmadi@enea.com>
Signed-off-by: Armin Kuster <akuster808@gmail.com>
---
.../CVE-2015-3194-Add-PSS-parameter-check.patch | 37 +++++++++++++
...CVE-2015-3195-Fix-leak-with-ASN.1-combine.patch | 61 ++++++++++++++++++++++
.../recipes-connectivity/openssl/openssl_1.0.1p.bb | 2 +
3 files changed, 100 insertions(+)
create mode 100644 meta/recipes-connectivity/openssl/openssl/CVE-2015-3194-Add-PSS-parameter-check.patch
create mode 100644 meta/recipes-connectivity/openssl/openssl/CVE-2015-3195-Fix-leak-with-ASN.1-combine.patch

diff --git a/meta/recipes-connectivity/openssl/openssl/CVE-2015-3194-Add-PSS-parameter-check.patch b/meta/recipes-connectivity/openssl/openssl/CVE-2015-3194-Add-PSS-parameter-check.patch
new file mode 100644
index 0000000..a6697ca
--- /dev/null
+++ b/meta/recipes-connectivity/openssl/openssl/CVE-2015-3194-Add-PSS-parameter-check.patch
@@ -0,0 +1,37 @@
+From d8541d7e9e63bf5f343af24644046c8d96498c17 Mon Sep 17 00:00:00 2001
+From: "Dr. Stephen Henson" <steve@openssl.org>
+Date: Fri, 2 Oct 2015 13:10:29 +0100
+Subject:Add PSS parameter check.
+
+Avoid seg fault by checking mgf1 parameter is not NULL. This can be
+triggered during certificate verification so could be a DoS attack
+against a client or a server enabling client authentication.
+
+Thanks to Loïc Jonas Etienne (Qnective AG) for discovering this bug.
+
+CVE-2015-3194
+
+Upstream-Status: Backport
+
+Reviewed-by: Matt Caswell <matt@openssl.org>
+Signed-off-by: Sona Sarmadi <sona.sarmadi@enea.com>
+---
+ crypto/rsa/rsa_ameth.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/crypto/rsa/rsa_ameth.c b/crypto/rsa/rsa_ameth.c
+index 93e071d..c7f1148 100644
+--- a/crypto/rsa/rsa_ameth.c
++++ b/crypto/rsa/rsa_ameth.c
+@@ -279,7 +279,7 @@ static RSA_PSS_PARAMS *rsa_pss_decode(const X509_ALGOR *alg,
+ if (pss->maskGenAlgorithm) {
+ ASN1_TYPE *param = pss->maskGenAlgorithm->parameter;
+ if (OBJ_obj2nid(pss->maskGenAlgorithm->algorithm) == NID_mgf1
+- && param->type == V_ASN1_SEQUENCE) {
++ && param && param->type == V_ASN1_SEQUENCE) {
+ p = param->value.sequence->data;
+ plen = param->value.sequence->length;
+ *pmaskHash = d2i_X509_ALGOR(NULL, &p, plen);
+--
+1.9.1
+
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 0000000..be705c0
--- /dev/null
+++ b/meta/recipes-connectivity/openssl/openssl/CVE-2015-3195-Fix-leak-with-ASN.1-combine.patch
@@ -0,0 +1,61 @@
+commit b29ffa392e839d05171206523e84909146f7a77c
+Author: Dr. Stephen Henson <steve@openssl.org>
+Date: Tue, 10 Nov 2015 19:03:07 +0000
+Subject: 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.
+
+Upstream-Status: Backport
+
+Thanks to Adam Langley (Google/BoringSSL) for discovering this bug using
+libFuzzer.
+
+PR#4131
+
+Reviewed-by: Richard Levitte <levitte@openssl.org>
+Signed-off-by: Sona Sarmadi <sona.sarmadi@enea.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;
+--
+1.9.1
+
diff --git a/meta/recipes-connectivity/openssl/openssl_1.0.1p.bb b/meta/recipes-connectivity/openssl/openssl_1.0.1p.bb
index 3f61790..1d0242f 100644
--- a/meta/recipes-connectivity/openssl/openssl_1.0.1p.bb
+++ b/meta/recipes-connectivity/openssl/openssl_1.0.1p.bb
@@ -34,6 +34,8 @@ SRC_URI += "file://configure-targets.patch \
file://Makefiles-ptest.patch \
file://ptest-deps.patch \
file://run-ptest \
+ file://CVE-2015-3194-Add-PSS-parameter-check.patch \
+ file://CVE-2015-3195-Fix-leak-with-ASN.1-combine.patch \
"

SRC_URI[md5sum] = "7563e92327199e0067ccd0f79f436976"
--
1.9.1