CVE-2020-11936

Arbitrary file disclosure via retained group privileges

Published Jan 31, 2025 · Updated Feb 7, 2025

Information disclosure in Canonical Apport before 2.20.11-0ubuntu27.6 allows local users to read arbitrary files through D-Bus calls. The data/apport crash handler invokes gdbus while checking whether a user session is closing without also dropping its group identity. A local low-privileged user can therefore make that subprocess access files permitted to the retained group identity.

CVSS severity2.5
Low
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Canonical Apport before 2.20.11-0ubuntu27.6 allows local users to read arbitrary files through D-Bus calls. The data/apport crash handler invokes gdbus while checking whether a user session is closing without also dropping its group identity. A local low-privileged user can therefore make that subprocess access files permitted to the retained group identity.

The record

CVE
CVE-2020-11936
Published
Jan 31, 2025
Updated
Feb 7, 2025
Vendor
Canonical
Product
Apport
Classifications
T1005
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 31, 2025CVE publishedPublication date reported by the CVE source.
  2. Feb 7, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <2.20.11-0ubuntu27.6

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Canonical · Apportversion=0 <2.20.11-0ubuntu27.6

Published CVSS scores

3.1Canonical CNACVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
2.5Ubuntu SecurityCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1005Data from Local System

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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