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CVE-2019-1563 is an information-disclosure vulnerability in OpenSSL CMS and PKCS#7 RSA decryption handling. The CMS_decrypt and PKCS7_decrypt code paths can expose a Bleichenbacher-style RSA PKCS#1 padding oracle when an application reveals whether each decryption operation succeeded or failed. An attacker can use repeated chosen-ciphertext queries to distinguish valid from invalid padding and progressively recover protected plaintext material.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
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.
15 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Security vulnerability addressed by the advisory; no technical details are provided.
An OpenSSL information-disclosure vulnerability involving PKCS7_dataDecode and CMS_decrypt_set1_pkey.
An OpenSSL information-disclosure vulnerability in PKCS7_dataDecode and CMS_decrypt_set1_pkey processing.
An OpenSSL information-disclosure vulnerability in PKCS7_dataDecode and CMS_decrypt_set1_pkey; addressed by Red Hat's OpenSSL update RHSA-2020:1840.
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.