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CVE-2023-5388 is a timing side-channel vulnerability in the RSA decryption implementation of Mozilla Network Security Services (NSS). Observable differences in decryption timing could potentially allow an attacker to recover private data. Affected applications include Firefox before version 124, Firefox ESR before version 115.9, and Thunderbird before version 115.9. Firefox WebCrypto RSA-OAEP decryption is also identified as an affected operation.
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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.
12 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A timing side-channel vulnerability in NSS RSA decryption could allow an attacker to recover private data. The advisory rates it Medium, with a CVSS v3 base score of 6.5, and recommends updating the nss library and related packages to version 2:3.98-1 or later. It states that no known exploits are available.
A vulnerability addressed by the Red Hat OpenStack Platform 17.1 container-image update; no technical details are provided in this advisory.
A vulnerability addressed by the updated RHEL 9 container images; no technical description is provided.
A CVE included in the OpenShift Container Platform 4.14.9 advisory; the content provides no further technical description.
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.