[openssl/openssl] 14b508: x509: excessive resource use verifying policy cons...

[Pauli]

  Branch: refs/heads/openssl-3.1
  Home:   https://github.com/openssl/openssl
  Commit: 14b508bc6bf9cf8bcbafea4711730ab00b70d8cc
      https://github.com/openssl/openssl/commit/14b508bc6bf9cf8bcbafea4711730ab00b70d8cc
  Author: Pauli <pauli at openssl.org>
  Date:   2023-03-22 (Wed, 22 Mar 2023)

  Changed paths:
    M crypto/x509/pcy_local.h
    M crypto/x509/pcy_node.c
    M crypto/x509/pcy_tree.c

  Log Message:
  -----------
  x509: excessive resource use verifying policy constraints

A security vulnerability has been identified in all supported versions
of OpenSSL related to the verification of X.509 certificate chains
that include policy constraints.  Attackers may be able to exploit this
vulnerability by creating a malicious certificate chain that triggers
exponential use of computational resources, leading to a denial-of-service
(DoS) attack on affected systems.

Fixes CVE-2023-0464

Reviewed-by: Tomas Mraz <tomas at openssl.org>
Reviewed-by: Shane Lontis <shane.lontis at oracle.com>


  Commit: 8940a801c10fdc6e837de37670512c4d2ee006c1
      https://github.com/openssl/openssl/commit/8940a801c10fdc6e837de37670512c4d2ee006c1
  Author: Pauli <pauli at openssl.org>
  Date:   2023-03-22 (Wed, 22 Mar 2023)

  Changed paths:
    A test/recipes/80-test_policy_tree.t
    A test/recipes/80-test_policy_tree_data/large_leaf.pem
    A test/recipes/80-test_policy_tree_data/large_policy_tree.pem
    A test/recipes/80-test_policy_tree_data/small_leaf.pem
    A test/recipes/80-test_policy_tree_data/small_policy_tree.pem

  Log Message:
  -----------
  test: add test cases for the policy resource overuse

These trees have pathological properties with respect to building.  The small
tree stays within the imposed limit, the large tree doesn't.

The large tree would consume over 150Gb of RAM to process.

Reviewed-by: Tomas Mraz <tomas at openssl.org>
Reviewed-by: Shane Lontis <shane.lontis at oracle.com>


  Commit: 059ebe1c05ce21f819c374b4a274857b27e988c3
      https://github.com/openssl/openssl/commit/059ebe1c05ce21f819c374b4a274857b27e988c3
  Author: Pauli <pauli at openssl.org>
  Date:   2023-03-22 (Wed, 22 Mar 2023)

  Changed paths:
    M CHANGES.md

  Log Message:
  -----------
  changes: note about policy tree size limits and circumvention

Reviewed-by: Tomas Mraz <tomas at openssl.org>
Reviewed-by: Shane Lontis <shane.lontis at oracle.com>


Compare: https://github.com/openssl/openssl/compare/20213c1b543e...059ebe1c05ce