Add CHANGES.md and NEWS.md updates for CVE-2024-13176

Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Neil Horman <nhorman@openssl.org>
Reviewed-by: Paul Dale <ppzgs1@gmail.com>
(Merged from openssl#26429)

CHANGES.md

@@ -127,6 +127,19 @@ OpenSSL 3.4
 
 ### Changes between 3.4.0 and 3.4.1 [xx XXX xxxx]
 
+ * Fixed timing side-channel in ECDSA signature computation.
+
+   There is a timing signal of around 300 nanoseconds when the top word of
+   the inverted ECDSA nonce value is zero. This can happen with significant
+   probability only for some of the supported elliptic curves. In particular
+   the NIST P-521 curve is affected. To be able to measure this leak, the
+   attacker process must either be located in the same physical computer or
+   must have a very fast network connection with low latency.
+
+   ([CVE-2024-13176])
+
+   *Tomáš Mráz*
+
  * Reverted the behavior change of CMS_get1_certs() and CMS_get1_crls()
    that happened in the 3.4.0 release. These functions now return NULL
    again if there are no certs or crls in the CMS object.
@@ -20986,6 +20999,7 @@ ndif
 
 <!-- Links -->
 
+[CVE-2024-13176]: https://www.openssl.org/news/vulnerabilities.html#CVE-2024-13176
 [CVE-2024-9143]: https://www.openssl.org/news/vulnerabilities.html#CVE-2024-9143
 [CVE-2024-6119]: https://www.openssl.org/news/vulnerabilities.html#CVE-2024-6119
 [CVE-2024-5535]: https://www.openssl.org/news/vulnerabilities.html#CVE-2024-5535

NEWS.md

@@ -49,13 +49,20 @@ This release adds the following new features:
 OpenSSL 3.4
 -----------
 
-### Major changes between OpenSSL 3.3 and OpenSSL 3.4 [under development]
+### Major changes between OpenSSL 3.4.0 and OpenSSL 3.4.1 [under development]
+
+This release is in development.
+
+This release incorporates the following bug fixes and mitigations:
+
+  * Fixed timing side-channel in ECDSA signature computation.
+    ([CVE-2024-13176])
+
+### Major changes between OpenSSL 3.3 and OpenSSL 3.4.0 [22 Oct 2024]
 
 OpenSSL 3.4.0 is a feature release adding significant new functionality to
 OpenSSL.
 
-This release is in development.
-
 This release incorporates the following potentially significant or incompatible
 changes:
 
@@ -1848,6 +1855,7 @@ OpenSSL 0.9.x
 
 <!-- Links -->
 
+[CVE-2024-13176]: https://www.openssl.org/news/vulnerabilities.html#CVE-2024-13176
 [CVE-2024-9143]: https://www.openssl.org/news/vulnerabilities.html#CVE-2024-9143
 [CVE-2024-6119]: https://www.openssl.org/news/vulnerabilities.html#CVE-2024-6119
 [CVE-2024-5535]: https://www.openssl.org/news/vulnerabilities.html#CVE-2024-5535