CVE-2020-5312Public exploitNetwork attack vector

Memory corruption via unchecked PCX row width

Published Jan 3, 2020 · Updated Aug 4, 2024

Buffer overflow in Pillow before 6.2.2 allows remote attackers to corrupt memory by supplying a crafted palette-mode PCX image. ImagingPcxDecode failed to reject P-mode rows whose pixel width exceeded the destination row-buffer size, allowing decoding to continue past its boundary. Exploitation requires an application to load attacker-controlled PCX data; memory corruption can crash the process or enable code execution within its privileges.

CVSS severity9.8
Critical
EPSS probability3.69%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in Pillow before 6.2.2 allows remote attackers to corrupt memory by supplying a crafted palette-mode PCX image. ImagingPcxDecode failed to reject P-mode rows whose pixel width exceeded the destination row-buffer size, allowing decoding to continue past its boundary. Exploitation requires an application to load attacker-controlled PCX data; memory corruption can crash the process or enable code execution within its privileges.

The record

CVE
CVE-2020-5312
Published
Jan 3, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-120, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 3, 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

9.3GitHub Advisory DatabaseCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
7.5NIST National Vulnerability DatabaseAV:N/AC:L/Au:N/C:P/I:P/A:P
9.8NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/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 exploitPublished

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1203Exploitation for Client Execution

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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