CVE-2021-0988

Installed-app disclosure via activity-launch side channel

Published Dec 15, 2021 · Updated Aug 3, 2024

Information disclosure in Android 12 ActivityClientController allows local users to determine whether a target app is installed. The getLaunchedFromUid and getLaunchedFromPackage methods expose observable result differences for queried activity tokens without enforcing package-visibility permissions. Any locally installed app can probe package presence without additional privileges or user interaction, but the disclosed fact is limited to installation status.

CVSS severity3.3
Low
EPSS probability0.11%
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 12 ActivityClientController allows local users to determine whether a target app is installed. The getLaunchedFromUid and getLaunchedFromPackage methods expose observable result differences for queried activity tokens without enforcing package-visibility permissions. Any locally installed app can probe package presence without additional privileges or user interaction, but the disclosed fact is limited to installation status.

The record

CVE
CVE-2021-0988
Published
Dec 15, 2021
Updated
Aug 3, 2024
Vendor
Google Cloud
Product
Android
Classifications
CWE-203, T1418
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 15, 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-12

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Google Cloud · Androidversion=Android-12

Published CVSS scores

2.1NIST NVDAV:L/AC:L/Au:N/C:P/I:N/A:N
3.3NIST NVDCVSS:3.1/AV:L/AC:L/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-203Observable Discrepancy
T1418Software Discovery

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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