CVE-2022-39047Network attack vector

Memory corruption via slashless modpack URL

Published Aug 31, 2022 · Updated Aug 3, 2024

Buffer overflow in Freeciv Modpack Installer before 2.6.7 and before 3.0.3 allows context-dependent attackers to overwrite memory via a crafted URL. When a URL contains no slash, the utility derives an unsigned length from -1 and copies the entire NUL-terminated URL past its allocated buffer. Exploitation requires a user to supply the crafted URL to the installer, exposing the installer process and its accessible data to memory corruption.

CVSS severity8.8
High
EPSS probability1.25%
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 Freeciv Modpack Installer before 2.6.7 and before 3.0.3 allows context-dependent attackers to overwrite memory via a crafted URL. When a URL contains no slash, the utility derives an unsigned length from -1 and copies the entire NUL-terminated URL past its allocated buffer. Exploitation requires a user to supply the crafted URL to the installer, exposing the installer process and its accessible data to memory corruption.

The record

CVE
CVE-2022-39047
Published
Aug 31, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-120, T1204
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 31, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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

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.

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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 exploitUnconfirmed

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1204User Execution

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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