[openssl/openssl] 845e19: x509: excessive resource use verifying policy cons...

[Pauli]

  Branch: refs/heads/master
  Home:   https://github.com/openssl/openssl
  Commit: 845e196d25bf21233aae18af6bb1164c55649cfe
      https://github.com/openssl/openssl/commit/845e196d25bf21233aae18af6bb1164c55649cfe
  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: ac3170995a1da13c03be9ca3d636733c6ac66101
      https://github.com/openssl/openssl/commit/ac3170995a1da13c03be9ca3d636733c6ac66101
  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: b8696e296928cd2f49ea1cde762e502ac9d4cd57
      https://github.com/openssl/openssl/commit/b8696e296928cd2f49ea1cde762e502ac9d4cd57
  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/03fa5127ded6...b8696e296928