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7.8

PicoZip can freeze when opening crafted ZOO archive

CVE-2007-2536 · published 19 years ago
Summary

The PicoZip compression tool may get stuck in an endless loop when it processes a specially crafted ZOO archive that contains a directory entry pointing to an earlier file. This can cause the program to become unresponsive, effectively a denial of service. Update PicoZip to the latest version or avoid opening untrusted ZOO files to prevent the issue.

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software
VendorProductAffected versions
picozip picozip 4.01
4.02
cpe:2.3:a:picozip:picozip:4.01:*:*:*:*:*:*:*
Original advisory text
PicoZip allows remote attackers to cause a denial of service (infinite loop) via a ZOO archive with a direntry structure that points to a previous file.
PicoZip allows remote attackers to cause a denial of service (infinite loop) via a ZOO archive with a direntry structure that points to a previous file.
References
Fix within
Internet-facing 14 days
Internal 60 days
  • Not known to be exploited
  • Can be exploited automatically (estimated)
  • Gives an attacker partial control (estimated)
Severity
7.8 High
Exploitation
9% chance of attack within 30 days
Timeline
Published9 May 2007
Updated15 Oct 2026
First seen29 Sep 2026
Sources
CVE-2007-2536 · NVD
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