File openssl-CVE-2023-0286.patch of Package openssl.28540

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File openssl-CVE-2023-0286.patch of Package openssl.28540

commit a72082b1fd459bc6355c0d6e0ac5f28a34ae73b0
Author: Hugo Landau <hlandau@openssl.org>
Date:   Tue Jan 17 17:45:42 2023 +0000

CVE-2023-0286: Fix GENERAL_NAME_cmp for x400Address (1.1.1)

---
 CHANGES                 |   18 ++++++++++++++++++
 crypto/x509v3/v3_genn.c |    2 +-
 crypto/x509v3/x509v3.h  |    2 +-
 3 files changed, 20 insertions(+), 2 deletions(-)

--- a/CHANGES
+++ b/CHANGES
@@ -4,6 +4,24 @@
 
  Changes between 1.0.2i and 1.0.2j [26 Sep 2016]
 
+  *) Fixed a type confusion vulnerability relating to X.400 address processing
+     inside an X.509 GeneralName. X.400 addresses were parsed as an ASN1_STRING
+     but subsequently interpreted by GENERAL_NAME_cmp as an ASN1_TYPE. This
+     vulnerability may allow an attacker who can provide a certificate chain and
+     CRL (neither of which need have a valid signature) to pass arbitrary
+     pointers to a memcmp call, creating a possible read primitive, subject to
+     some constraints. Refer to the advisory for more information. Thanks to
+     David Benjamin for discovering this issue. (CVE-2023-0286)
+
+     This issue has been fixed by changing the public header file definition of
+     GENERAL_NAME so that x400Address reflects the implementation. It was not
+     possible for any existing application to successfully use the existing
+     definition; however, if any application references the x400Address field
+     (e.g. in dead code), note that the type of this field has changed. There is
+     no ABI change.
+
+     [Hugo Landau]
+
   *) Missing CRL sanity check
 
      A bug fix which included a CRL sanity check was added to OpenSSL 1.1.0
--- a/crypto/x509v3/v3_genn.c
+++ b/crypto/x509v3/v3_genn.c
@@ -148,7 +148,7 @@ int GENERAL_NAME_cmp(GENERAL_NAME *a, GE
         return -1;
     switch (a->type) {
     case GEN_X400:
-        result = ASN1_TYPE_cmp(a->d.x400Address, b->d.x400Address);
+        result = ASN1_STRING_cmp(a->d.x400Address, b->d.x400Address);
         break;
 
     case GEN_EDIPARTY:
--- a/crypto/x509v3/x509v3.h
+++ b/crypto/x509v3/x509v3.h
@@ -190,7 +190,7 @@ typedef struct GENERAL_NAME_st {
         OTHERNAME *otherName;   /* otherName */
         ASN1_IA5STRING *rfc822Name;
         ASN1_IA5STRING *dNSName;
-        ASN1_TYPE *x400Address;
+        ASN1_STRING *x400Address;
         X509_NAME *directoryName;
         EDIPARTYNAME *ediPartyName;
         ASN1_IA5STRING *uniformResourceIdentifier;

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