CVE-2022-28652

Local resource exhaustion via settings interpolation

Published Jun 4, 2024 · Updated Mar 13, 2025

Resource exhaustion in Canonical Apport before 2.21.0 allows local users to interrupt crash reporting via a crafted settings file. The get_config() path in apport/fileutils.py enables ConfigParser interpolation while reading ~/.config/apport/settings, allowing recursively referenced values to expand exponentially. A local user must supply the settings file; parsing it consumes CPU and memory in the Apport process, interrupting crash-report generation.

CVSS severity5.5
Medium
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in Canonical Apport before 2.21.0 allows local users to interrupt crash reporting via a crafted settings file. The get_config() path in apport/fileutils.py enables ConfigParser interpolation while reading ~/.config/apport/settings, allowing recursively referenced values to expand exponentially. A local user must supply the settings file; parsing it consumes CPU and memory in the Apport process, interrupting crash-report generation.

The record

CVE
CVE-2022-28652
Published
Jun 4, 2024
Updated
Mar 13, 2025
Vendor
Canonical
Product
Apport
Classifications
CWE-776, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 4, 2024CVE publishedPublication date reported by the CVE source.
  2. Mar 13, 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 <2.21.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Canonical · Apportversion=0 <2.21.0

Published CVSS scores

5.5CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-776Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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