CVE-2020-10931Public exploitNetwork attack vector

Daemon crash via unchecked binary extension length

Published Mar 24, 2020 · Updated Aug 4, 2024

Stack-based buffer overflow in Memcached 1.6.0 through 1.6.1 allows remote attackers to crash the daemon via a binary protocol header. try_read_command_binary copies the header-declared extlen bytes into a fixed-size stack buffer without first limiting extlen to BIN_MAX_EXTLEN. An unauthenticated network client can send an oversized extension-length field and a matching packet body, terminating the service with a segmentation fault.

CVSS severity7.5
High
EPSS probability28.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in Memcached 1.6.0 through 1.6.1 allows remote attackers to crash the daemon via a binary protocol header. try_read_command_binary copies the header-declared extlen bytes into a fixed-size stack buffer without first limiting extlen to BIN_MAX_EXTLEN. An unauthenticated network client can send an oversized extension-length field and a matching packet body, terminating the service with a segmentation fault.

The record

CVE
CVE-2020-10931
Published
Mar 24, 2020
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. Mar 24, 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?

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

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.

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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')
T1499.004Endpoint Denial of Service: Application 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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