UpHeron
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Servers and applications

CVE-2006-4018

Heap-based buffer overflow in the pefromupx function in libclamav/upx.c in Clam AntiVirus (ClamAV) 0.81 through 0.88.3 allows remote attackers to execute arbitrary code via a crafted UPX packed file containing sections with large rsize values.

Severity
High 7.5
Published
8 Aug 2006
Last changed
16 Jun 2026
Added to UpHeron
1 Nov 2026
Exploit chance
19% in the next 30 daysHigher than 97% of CVEs. EPSS by FIRST, 12 Nov 2026
Weakness
Memory buffer errors (CWE-119)
Attack
Over the network · No login needed
Attacker can
Read some data · Change some data · Slow it down
CVSS vector
AV:N/AC:L/Au:N/C:P/I:P/A:P
Sources
NVD

Affected software

SoftwareAffected versions
ClamAVServers and applications · cpe:a:clamav:clamav
  • Version 0.88.3
  • Version 0.88.2
  • Version 0.88.1
  • Version 0.88
All 19 release lines
  • Version 0.81-rc1
  • Version 0.81
  • Version 0.82
  • Version 0.83
  • Version 0.84-rc1
  • Version 0.84-rc2
  • Version 0.84
  • Version 0.85
  • Version 0.85.1
  • Version 0.86-rc1
  • Version 0.86
  • Version 0.86.1
  • Version 0.86.2
  • Version 0.87
  • Version 0.87.1
  • Version 0.88
  • Version 0.88.1
  • Version 0.88.2
  • Version 0.88.3

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2006-4018
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2006-4018