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CVE-2024-5300 is an access control bypass and information disclosure vulnerability in Canonical snapd caused by an overly permissive base AppArmor profile. The abstraction rules in the nss-systemd AppArmor abstraction inherited by snap confinement allow strictly confined snap applications to access the systemd-userdbd Varlink sockets used for user database queries. On systems where systemd-userdbd is installed and running, the service does not distinguish between an unconfined host root context and a root process executing inside a snap sandbox. As a result, a strictly confined snap component running as root, such as a daemon or configuration hook, can query the userdb interface and obtain complete user records, including hashed passwords normally protected in the shadow database. The flaw therefore breaks intended snap sandbox isolation and exposes sensitive authentication material to code that should not have access to it.
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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.
3 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A medium-severity snapd vulnerability affecting Ubuntu LTS releases back to 16.04 that allows sandboxed applications to access hashed user passwords.
A snapd AppArmor template weakness that failed to restrict access to the systemd-userdbd varlink interface, potentially allowing a local attacker to obtain sensitive information.
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.