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Fencer Vulns
high 7.5

CVE-2006-4018 in the critical feed json

Heap-based buffer overflow in the pefromupx function in libclamav/upx.c in Clam AntiVirus (ClamAV) 0.81 through 0.88.3 allows remote attack…

published 2006-08-08 20 y ago modified 2026-06-16 4 mo ago also EUVD-2006-4011

cvss
7.5
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
19.4%
EPSS 19.4% chance of exploitation in 30 days, percentile 97%
public exploits
1
Exploit-DB

Summary

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.

Patch / fix

  • clamav Debian 14, Debian 13, Debian 12 0.88.4-1

debian advisories DEBIAN-CVE-2006-4018

Timeline

  1. First public exploit (EDB-28348)
  2. Published

Exploit prediction

19.40% chance of exploitation in the next 30 days, higher than 97% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-28348 Clam Anti-Virus ClamAV 0.88.x - UPX Compressed PE File Heap Buffer Overflow dos, 2006-08-07
  • overflow.pl http://www.overflow.pl/adv/clamav_upx_heap.txt referenced PoC, tagged "exploit" by a source, unverified
  • clamav.net http://www.clamav.net/security/0.88.4.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.