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NVD / CVE Program· CNA canonical

CVE-2021-32557: apport process_report() arbitrary file write

HighCVSS 7.1 · v3.1—No exploit No fix recorded

Noroxi assessment

Priority: Monitor (action score 28/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.39% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • According to the record, no fixed version is available yet.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Update when a fix is released; follow the vendor's advisory.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

It was discovered that the process_report() function in data/whoopsie-upload-all allowed arbitrary file writes via symlinks.

Published
Jun 12, 2021
Updated
Jun 16, 2026
EPSS
0.3% · 33th percentile

Report tools

JSON

Action score

28

Monitor

Low priority for now.

CVSS
28 / 40 · 7.1 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.3%

CNA vs NVD score

NVD
7.1
CNA · canonical
5.2
1.9 point gap

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • No fixed version yet

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2021-32557

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
canonicalapport

Versions reported by the vendor

Affected version ranges reported by the assigning authority (canonical). Independent of NVD's CPE analysis and usually ahead of it.

  • Canonical apport

    • 2.20.1 and later · before 2.20.1-0ubuntu2.30+esm1affected
    • 2.20.9 and later · before 2.20.9-0ubuntu7.24affected
    • 2.20.11-0ubuntu27 and later · before 2.20.11-0ubuntu27.18affected
    • 2.20.11-0ubuntu50 and later · before 2.20.11-0ubuntu50.7affected
    • 2.20.11-0ubuntu65 and later · before 2.20.11-0ubuntu65.1affected
    • 2.14.1-0ubuntu3 and later · before 2.14.1-0ubuntu3.29+esm7affected
Affected versions · NVD (6)

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • canonical apport2.14.1-0ubuntu3 and later · before 2.14.1-0ubuntu3.29\+esm7
  • canonical apport2.20.1 and later · before 2.20.1-0ubuntu2.30\+esm1
  • canonical apport2.20.9 and later · before 2.20.9-0ubuntu7.24
  • canonical apport2.20.11-0ubuntu27 and later · before 2.20.11-0ubuntu27.18
  • canonical apport2.20.11-0ubuntu50 and later · before 2.20.11-0ubuntu50.7
  • canonical apport2.20.11-0ubuntu65 and later · before 2.20.11-0ubuntu65.1

Same product

canonical: all records

Other highest-scoring records for the same primary product.

  • CVE-2022-1242Apport can be tricked into connecting to arbitrary sockets as the root user
    31Monitor
  • CVE-2021-3899There is a race condition in the 'replaced executable' detection that, with the correct local configuration, allow an attacker to execute…
    31Monitor
  • CVE-2023-1326local privilege escalation in apport-cli
    31Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2021-25684Jun 10, 2021 · apport can be stalled by reading a FIFO
    31Monitor
  • ← EarlierCVE-2021-32556Jun 12, 2021 · apport get_modified_conffiles() function command injection
    13Monitor
  • Later →CVE-2021-3709Sep 30, 2021 · Apport file permission bypass through emacs byte compilation errors
    22Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Not on record for this CVE: EPSS history · patch commit or PR link · variant or chain candidate · public bounty program.

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-59 · Improper Link Resolution Before File Access ('Link Following')

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

All records