OpenSSL Fixes Multiple New Security Flaws with Latest Update

The OpenSSL Task has released fixes to address a number of security flaws, together with a large-severity bug in the open up supply encryption toolkit that could likely expose consumers to destructive attacks.

Tracked as CVE-2023-0286, the issue relates to a scenario of kind confusion that could allow an adversary to “go through memory contents or enact a denial-of-service,” the maintainers explained in an advisory.

The vulnerability is rooted in the way the well known cryptographic library handles X.509 certificates, and is likely to influence only those people programs that have a customized implementation for retrieving a certificate revocation record (CRL) over a network.

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“In most cases, the attack needs the attacker to provide the two the certification chain and CRL, neither of which need to have a legitimate signature,” OpenSSL said. “If the attacker only controls one of these inputs, the other enter ought to by now incorporate an X.400 address as a CRL distribution stage, which is unusual.”

Form confusion flaws could have major implications, as they could be weaponized to deliberately power the application to behave in unintended means, quite possibly creating a crash or code execution.

The issue has been patched in OpenSSL versions 3..8, 1.1.1t, and 1..2zg. Other security flaws tackled as portion of the most recent updates incorporate:

• CVE-2022-4203 – X.509 Name Constraints Read through Buffer Overflow
• CVE-2022-4304 – Timing Oracle in RSA Decryption
• CVE-2022-4450 – Double free just after contacting PEM_go through_bio_ex
• CVE-2023-0215 – Use-right after-no cost following BIO_new_NDEF
• CVE-2023-0216 – Invalid pointer dereference in d2i_PKCS7 features
• CVE-2023-0217 – NULL dereference validating DSA public essential
• CVE-2023-0401 – NULL dereference throughout PKCS7 info verification

Effective exploitation of the higher than shortcomings could lead to an application crash, disclose memory contents, and even recuperate plaintext messages sent around a network by using edge of a timing-primarily based side-channel in what is actually a Bleichenbacher-model attack.

The fixes arrive virtually two months just after OpenSSL plugged a reduced-severity flaw (CVE-2022-3996) that occurs when processing an X.509 certification, resulting in a denial-of-company condition.

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