Privilege escalation in Freedesktop Accountsservice
CVE-2020-16126
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.
Vulnerability class: Privilege Escalation
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.3 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.005 (43.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 43rd percentile — 43.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Freedesktop Accountsservice — versions 0.6.35-0ubuntu7.3, 0.6.40-2ubuntu11, 0.6.45-1ubuntu1
Weakness classification (CWE)
Public proof-of-concept exploits
References
- securitylab.github.com/advisories/GHSL-2020-187-accountsservice-drop-privs-DOS (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-16126?
- CVE-2020-16126 is a low-severity vulnerability in Freedesktop Accountsservice, classified under Improper Privilege Management. CVSS score: 3.3/10. Published 2020-11-11.
- How severe is CVE-2020-16126?
- Low severity. CVSS v3 base score is 3.3 out of 10.
- Is CVE-2020-16126 known to be exploited?
- 6 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.