CVE-2014-4607Public exploitNetwork attack vector

Code execution via literal-run length overflow

Published Feb 12, 2020 · Updated Aug 6, 2024

Integer overflow in Oberhumer LZO before 2.07 allows remote attackers to execute arbitrary code via crafted compressed input on 32-bit platforms. In lzo1x_decompress_safe and related safe decompressor variants, repeated zero bytes add 255 to the literal length until it wraps, so NEED_OP validates the truncated size before literals are copied. The application must decompress more than 16 MiB of attacker-controlled data in one call; a crash is practical, while code execution is highly specialized and impractical.

CVSS severity8.8
High
EPSS probability5.32%
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 Oberhumer LZO before 2.07 allows remote attackers to execute arbitrary code via crafted compressed input on 32-bit platforms. In lzo1x_decompress_safe and related safe decompressor variants, repeated zero bytes add 255 to the literal length until it wraps, so NEED_OP validates the truncated size before literals are copied. The application must decompress more than 16 MiB of attacker-controlled data in one call; a crash is practical, while code execution is highly specialized and impractical.

The record

CVE
CVE-2014-4607
Published
Feb 12, 2020
Updated
Aug 6, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-190, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 12, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 6, 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

6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P
8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/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.

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 exploitPublished

Weakness, pattern, technique

CWE-190Integer Overflow or Wraparound
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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