CVE-2020-36628

File write via unchecked ZIP entry paths

Published Dec 25, 2022 · Updated Aug 4, 2024

Path traversal in Calsign APDE before 0.5.2-pre2-alpha allows attackers to write files outside the ZIP extraction directory. CopyBuildTask.handleExtract joins each untrusted ZipEntry name to the destination folder and extracts it without verifying that the canonical output path remains beneath that folder. A crafted archive must reach APDE's local Android build workflow; writes remain limited to locations accessible to the APDE process.

CVSS severity5.5
Medium
EPSS probability0.87%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in Calsign APDE before 0.5.2-pre2-alpha allows attackers to write files outside the ZIP extraction directory. CopyBuildTask.handleExtract joins each untrusted ZipEntry name to the destination folder and extracts it without verifying that the canonical output path remains beneath that folder. A crafted archive must reach APDE's local Android build workflow; writes remain limited to locations accessible to the APDE process.

The record

CVE
CVE-2020-36628
Published
Dec 25, 2022
Updated
Aug 4, 2024
Vendor
Calsign
Product
Android Processing Development Environment (APDE)
Classifications
CWE-22, T1204.002
Attack vector
adjacent
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 25, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=n/a

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesauthenticated

What is affected?

Calsign · Android Processing Development Environment (APDE)version=n/a

Published CVSS scores

9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
5.5VulDBCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

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

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1204.002User Execution: Malicious File

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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