CVE-2023-34204Public exploit

File overwrite via predictable temporary paths

Published May 30, 2023 · Updated Jan 10, 2025

Link-following in imapsync 2.229 and earlier allows local users to overwrite files owned by the account that runs imapsync. With default options, the PID-file path /tmp/imapsync.pid is predictable, and ordinary file writes follow an attacker-created symbolic link. Exploitation requires write access to the shared temporary directory and a victim account to run imapsync; the overwrite carries that account's file privileges.

CVSS severity6.5
Medium
EPSS probability0.63%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Link-following in imapsync 2.229 and earlier allows local users to overwrite files owned by the account that runs imapsync. With default options, the PID-file path /tmp/imapsync.pid is predictable, and ordinary file writes follow an attacker-created symbolic link. Exploitation requires write access to the shared temporary directory and a victim account to run imapsync; the overwrite carries that account's file privileges.

The record

CVE
CVE-2023-34204
Published
May 30, 2023
Updated
Jan 10, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-59, T1565.001
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. May 30, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 10, 2025Record 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 vectorlocal
Required privilegesUnavailable in this record.

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

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)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-59Improper Link Resolution Before File Access ('Link Following')
T1565.001Stored Data Manipulation

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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