gnu: openssl: Fix CVE-2019-1559.

* gnu/packages/tls.scm (openssl)[replacement]: New field.
(openssl/fixed): New variable.
(openssl-next)[inherit]: Inherit from it instead.
* gnu/packages/patches/openssl-CVE-2019-1559.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.

1 files changed, 60 insertions, 0 deletions

diff --git a/gnu/packages/patches/openssl-CVE-2019-1559.patch b/gnu/packages/patches/openssl-CVE-2019-1559.patch
new file mode 100644
index 0000000000..3e630037b5
--- /dev/null
+++ b/gnu/packages/patches/openssl-CVE-2019-1559.patch
@@ -0,0 +1,60 @@
+From e9bbefbf0f24c57645e7ad6a5a71ae649d18ac8e Mon Sep 17 00:00:00 2001
+From: Matt Caswell <matt@openssl.org>
+Date: Fri, 14 Dec 2018 07:28:30 +0000
+Subject: [PATCH] Go into the error state if a fatal alert is sent or received
+
+If an application calls SSL_shutdown after a fatal alert has occured and
+then behaves different based on error codes from that function then the
+application may be vulnerable to a padding oracle.
+
+CVE-2019-1559
+
+Reviewed-by: Richard Levitte <levitte@openssl.org>
+---
+ ssl/d1_pkt.c |  1 +
+ ssl/s3_pkt.c | 10 +++++++---
+ 2 files changed, 8 insertions(+), 3 deletions(-)
+
+diff --git a/ssl/d1_pkt.c b/ssl/d1_pkt.c
+index 23aa9db..c7fe977 100644
+--- a/ssl/d1_pkt.c
++++ b/ssl/d1_pkt.c
+@@ -1309,6 +1309,7 @@ int dtls1_read_bytes(SSL *s, int type, unsigned char *buf, int len, int peek)
+             ERR_add_error_data(2, "SSL alert number ", tmp);
+             s->shutdown |= SSL_RECEIVED_SHUTDOWN;
+             SSL_CTX_remove_session(s->session_ctx, s->session);
++            s->state = SSL_ST_ERR;
+             return (0);
+         } else {
+             al = SSL_AD_ILLEGAL_PARAMETER;
+diff --git a/ssl/s3_pkt.c b/ssl/s3_pkt.c
+index 6527df8..830b723 100644
+--- a/ssl/s3_pkt.c
++++ b/ssl/s3_pkt.c
+@@ -1500,6 +1500,7 @@ int ssl3_read_bytes(SSL *s, int type, unsigned char *buf, int len, int peek)
+             ERR_add_error_data(2, "SSL alert number ", tmp);
+             s->shutdown |= SSL_RECEIVED_SHUTDOWN;
+             SSL_CTX_remove_session(s->session_ctx, s->session);
++            s->state = SSL_ST_ERR;
+             return (0);
+         } else {
+             al = SSL_AD_ILLEGAL_PARAMETER;
+@@ -1719,9 +1720,12 @@ int ssl3_send_alert(SSL *s, int level, int desc)
+                                           * protocol_version alerts */
+     if (desc < 0)
+         return -1;
+-    /* If a fatal one, remove from cache */
+-    if ((level == 2) && (s->session != NULL))
+-        SSL_CTX_remove_session(s->session_ctx, s->session);
++    /* If a fatal one, remove from cache and go into the error state */
++    if (level == SSL3_AL_FATAL) {
++        if (s->session != NULL)
++            SSL_CTX_remove_session(s->session_ctx, s->session);
++        s->state = SSL_ST_ERR;
++    }
+ 
+     s->s3->alert_dispatch = 1;
+     s->s3->send_alert[0] = level;
+-- 
+2.7.4
+