🛡️ USN-6039-1 — openssl

openssl, openssl1.0 vulnerabilities

It was discovered that OpenSSL was not properly managing file locks when

processing policy constraints. If a user or automated system were tricked

into processing a certificate chain with specially crafted policy

constraints, a remote attacker could possibly use this issue to cause a

denial of service. This issue only affected Ubuntu 22.04 LTS and Ubuntu

22.10. (CVE-2022-3996)

David Benjamin discovered that OpenSSL was not properly performing the

verification of X.509 certificate chains that include policy constraints,

which could lead to excessive resource consumption. If a user or automated

system were tricked into processing a specially crafted X.509 certificate

chain that includes policy constraints, a remote attacker could possibly

use this issue to cause a denial of service. (CVE-2023-0464)

David Benjamin discovered that OpenSSL was not properly handling invalid

certificate policies in leaf certificates, which would result in certain

policy checks being skipped for the certificate. If a user or automated

system were tricked into processing a specially crafted certificate, a

remote attacker could possibly use this issue to assert invalid

certificate policies and circumvent policy checking. (CVE-2023-0465)

David Benjamin discovered that OpenSSL incorrectly documented the

functionalities of function X509_VERIFY_PARAM_add0_policy, stating that

it would implicitly enable certificate policy checks when doing

certificate verifications, contrary to its implementation. This could

cause users and applications to not perform certificate policy checks

even when expected to do so. (CVE-2023-0466)