CVE-2020-16126

accountsservice drops ruid, allows unprivileged users to send it signals

CVSS 3.3 LOWEPSS 0.5%CWE-269

Vexday Risk Score

8Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 3.3EPSS 0.5%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

11 Nov 2020Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

An Ubuntu-specific modification to AccountsService in versions before 0.6.55-0ubuntu13.2, among other earlier versions, improperly dropped the ruid, allowing untrusted users to send signals to AccountService, thus stopping it from handling D-Bus messages in a timely fashion.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Affected products

Freedesktop · accountsservice

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References

https://securitylab.github.com/advisories/GHSL-2020-187-accountsservice-drop-privs-DOS