openssl: fix for CVE-2010-5298

Race condition in the ssl3_read_bytes function in s3_pkt.c in OpenSSL
through 1.0.1g, when SSL_MODE_RELEASE_BUFFERS is enabled, allows remote
attackers to inject data across sessions or cause a denial of service
(use-after-free and parsing error) via an SSL connection in a
multithreaded environment.

http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2010-5298

(From OE-Core rev: 751f81ed8dc488c500837aeb3eb41ebf3237e10b)

Signed-off-by: Yue Tao <Yue.Tao@windriver.com>
Signed-off-by: Roy Li <rongqing.li@windriver.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

diff --git a/meta/recipes-connectivity/openssl/openssl-1.0.1e/openssl-CVE-2010-5298.patch b/meta/recipes-connectivity/openssl/openssl-1.0.1e/openssl-CVE-2010-5298.patch
new file mode 100644 (file)
index 0000000..417a774
--- /dev/null
+++ b/meta/recipes-connectivity/openssl/openssl-1.0.1e/openssl-CVE-2010-5298.patch
@@ -0,0 +1,24 @@
+openssl fix for CVE-2010-5298
+
+Upstream-Status: Backport
+
+Race condition in the ssl3_read_bytes function in s3_pkt.c in OpenSSL
+through 1.0.1g, when SSL_MODE_RELEASE_BUFFERS is enabled, allows remote
+attackers to inject data across sessions or cause a denial of service
+(use-after-free and parsing error) via an SSL connection in a
+multithreaded environment.
+
+http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2010-5298
+
+Signed-off-by: Yue Tao <Yue.Tao@windriver.com>
+--- a/ssl/s3_pkt.c
++++ b/ssl/s3_pkt.c
+@@ -1013,7 +1013,7 @@ start:
+                               {
+                               s->rstate=SSL_ST_READ_HEADER;
+                               rr->off=0;
+-                              if (s->mode & SSL_MODE_RELEASE_BUFFERS)
++                              if (s->mode & SSL_MODE_RELEASE_BUFFERS && s->s3->rbuf.left == 0)
+                                       ssl3_release_read_buffer(s);
+                               }
+                       }