CVE-2019-3553Network attack vector

Server denial of service via unchecked container preallocation

Published Mar 10, 2020 · Updated Aug 4, 2024

Resource exhaustion in Meta Facebook Thrift before 2020.02.03.00 allows remote attackers to interrupt C++ servers with crafted messages. Container readers trust declared list, set, and map sizes and preallocate memory without first confirming that the payload has enough bytes for those elements. Any unauthenticated client able to submit a Thrift message can consume disproportionate memory and interrupt the serving process.

CVSS severity7.5
High
EPSS probability2.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in Meta Facebook Thrift before 2020.02.03.00 allows remote attackers to interrupt C++ servers with crafted messages. Container readers trust declared list, set, and map sizes and preallocate memory without first confirming that the payload has enough bytes for those elements. Any unauthenticated client able to submit a Thrift message can consume disproportionate memory and interrupt the serving process.

The record

CVE
CVE-2019-3553
Published
Mar 10, 2020
Updated
Aug 4, 2024
Vendor
Meta Platforms, Inc.
Product
Facebook Thrift
Classifications
CWE-770, T1499.003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 10, 2020CVE 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?

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

  1. Affected versionversion=unspecified <v2020.02.03.00

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Meta Platforms, Inc. · Facebook Thriftversion=unspecified <v2020.02.03.00

Published CVSS scores

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

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

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

Weakness, pattern, technique

CWE-770Allocation of Resources Without Limits or Throttling
T1499.003Application Exhaustion Flood

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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