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CVE-2023-6237 is a low-severity algorithmic-complexity denial-of-service vulnerability in OpenSSL RSA public-key validation. When EVP_PKEY_public_check() validates an RSA public key, it performs a computation to establish that the modulus n is composite. This operation completes quickly for a valid RSA modulus, but can take an excessive amount of time when an attacker supplies an invalid key containing an overly large prime modulus. OpenSSL 3.0.0 through 3.0.12, 3.1.0 through 3.1.4, and 3.2.0 are affected, including the OpenSSL 3.0 and 3.1 FIPS providers. OpenSSL 1.0.2 and 1.1.1 are not affected. The SSL/TLS implementation does not invoke the affected function and is not affected.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
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No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
7 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An OpenSSL vulnerability causing excessive time spent checking invalid RSA public keys.
EVP_PKEY_public_check() can take a long time, potentially enabling denial of service or resource exhaustion conditions.
A vulnerability in OpenSSL where checking invalid RSA public keys may consume excessive time.
A vulnerability addressed by the updated Red Hat Developer Hub container image; no technical details are provided in this advisory text.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.