CVE-2021-0340Network attack vector

Location disclosure via mishandled ISO box lengths

Published Feb 10, 2021 · Updated Aug 3, 2024

Information disclosure in Android 10 MediaProvider allows remote attackers to obtain unredacted location data from crafted videos. IsoInterface.parseNextBox treats 64-bit and end-of-file ISO box-length encodings as ordinary lengths, so location metadata is parsed incorrectly and survives redaction. Exploitation requires user interaction with the crafted media, and the reported consequence is disclosure of embedded location information.

CVSS severity8.8
High
EPSS probability2.06%
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 Android 10 MediaProvider allows remote attackers to obtain unredacted location data from crafted videos. IsoInterface.parseNextBox treats 64-bit and end-of-file ISO box-length encodings as ordinary lengths, so location metadata is parsed incorrectly and survives redaction. Exploitation requires user interaction with the crafted media, and the reported consequence is disclosure of embedded location information.

The record

CVE
CVE-2021-0340
Published
Feb 10, 2021
Updated
Aug 3, 2024
Vendor
Google Cloud
Product
Android
Classifications
CWE-212, CAPEC-168
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 10, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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?

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

  1. Affected versionversion=Android-10

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Google Cloud · Androidversion=Android-10

Published CVSS scores

9.3NIST NVDAV:N/AC:M/Au:N/C:C/I:C/A:C
8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/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.

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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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-212Improper Removal of Sensitive Information Before Storage or Transfer
CAPEC-168Windows ::DATA Alternate Data Stream

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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