Add CHANGES.md and NEWS.md entries for CVE-2023-6129

Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/23200)

(cherry picked from commit 858c7bc210a406cc7f891ac2aed78692d2e02937)

diff --git a/CHANGES.md b/CHANGES.md
index 11f4d6a8d89ee3bcecf6f74e75971ee37d973b94..b30ef7b46bd00cd57dc4a746be853e1a6d8a47c8 100644 (file)
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -24,6 +24,26 @@ OpenSSL 3.1
 
 ### Changes between 3.1.4 and 3.1.5 [xx XXX xxxx]
 
+ * The POLY1305 MAC (message authentication code) implementation in OpenSSL
+   for PowerPC CPUs saves the contents of vector registers in different
+   order than they are restored. Thus the contents of some of these vector
+   registers is corrupted when returning to the caller. The vulnerable code is
+   used only on newer PowerPC processors supporting the PowerISA 2.07
+   instructions.
+
+   The consequences of this kind of internal application state corruption can
+   be various - from no consequences, if the calling application does not
+   depend on the contents of non-volatile XMM registers at all, to the worst
+   consequences, where the attacker could get complete control of the
+   application process. However unless the compiler uses the vector registers
+   for storing pointers, the most likely consequence, if any, would be an
+   incorrect result of some application dependent calculations or a crash
+   leading to a denial of service.
+
+   ([CVE-2023-6129])
+
+   *Rohan McLure*
+
  * Fix excessive time spent in DH check / generation with large Q parameter
    value.
 
@@ -19880,6 +19900,7 @@ ndif
 
 <!-- Links -->
 
+[CVE-2023-6129]: https://www.openssl.org/news/vulnerabilities.html#CVE-2023-6129
 [CVE-2023-5678]: https://www.openssl.org/news/vulnerabilities.html#CVE-2023-5678
 [CVE-2023-5363]: https://www.openssl.org/news/vulnerabilities.html#CVE-2023-5363
 [CVE-2023-4807]: https://www.openssl.org/news/vulnerabilities.html#CVE-2023-4807

diff --git a/NEWS.md b/NEWS.md
index a953810c92afd77104d5fa2e778c4d0e9a3805ea..e27105d1b6ed151a8126d64ad40fb6c5e22dd8c6 100644 (file)
--- a/NEWS.md
+++ b/NEWS.md
@@ -21,6 +21,9 @@ OpenSSL 3.1
 
 ### Major changes between OpenSSL 3.1.4 and OpenSSL 3.1.5 [under development]
 
+  * Fix POLY1305 MAC implementation corrupting vector registers on PowerPC
+    CPUs which support PowerISA 2.07
+    ([CVE-2023-6129])
   * Fix excessive time spent in DH check / generation with large Q parameter
     value ([CVE-2023-5678])
 
@@ -1479,6 +1482,7 @@ OpenSSL 0.9.x
 
 <!-- Links -->
 
+[CVE-2023-6129]: https://www.openssl.org/news/vulnerabilities.html#CVE-2023-6129
 [CVE-2023-5678]: https://www.openssl.org/news/vulnerabilities.html#CVE-2023-5678
 [CVE-2023-5363]: https://www.openssl.org/news/vulnerabilities.html#CVE-2023-5363
 [CVE-2023-4807]: https://www.openssl.org/news/vulnerabilities.html#CVE-2023-4807