CVE-2021-38192Public exploitNetwork attack vector

Application crash via unchecked timestamp arithmetic

Published Aug 8, 2021 · Updated Aug 4, 2024

Integer overflow in prost-types before 0.8.0 allows attackers to crash applications that convert untrusted Timestamp values. The From for SystemTime implementation uses unchecked addition or subtraction on UNIX_EPOCH, while Timestamp::normalize also performs unchecked arithmetic. A crafted out-of-range seconds or nanoseconds value triggers a platform- and build-dependent panic, interrupting any service that processes it.

CVSS severity7.5
High
EPSS probability1.10%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer overflow in prost-types before 0.8.0 allows attackers to crash applications that convert untrusted Timestamp values. The From for SystemTime implementation uses unchecked addition or subtraction on UNIX_EPOCH, while Timestamp::normalize also performs unchecked arithmetic. A crafted out-of-range seconds or nanoseconds value triggers a platform- and build-dependent panic, interrupting any service that processes it.

The record

CVE
CVE-2021-38192
Published
Aug 8, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-120, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 8, 2021CVE 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5.0NVDAV:N/AC:L/Au:N/C:N/I:N/A:P

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 exploitPublished

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1499.004Application or System Exploitation

Public exploit references

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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