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    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.

    Published:Aug 8, 2006
    Last Modified:Apr 16, 2026
    EPS:Aug 8, 2006
    EPSS Score:0.44627
    CVSS Score:7.5

    Affected Products

    Vendor
    Clamav
    Product
    Clamav

    Exploits

    http://www.clamav.net/security/0.88.4.htmlhttp://www.overflow.pl/adv/clamav_upx_heap.txthttp://www.clamav.net/security/0.88.4.htmlhttp://www.overflow.pl/adv/clamav_upx_heap.txthttps://www.exploit-db.com/exploits/28348

    Related CVEs

    CVE-2020-37167 (CVSS 8.6) — ClamAV versions prior to 0.103.0-rc contain a vulnerability in function name processing through the ClamBC byt…
    CVE-2025-20260 (CVSS 9.8) — A vulnerability in the PDF scanning processes of ClamAV could allow an unauthenticated, remote attacker to cau…
    CVE-2025-20234 (CVSS 5.3) — A vulnerability in Universal Disk Format (UDF) processing of ClamAV could allow an unauthenticated, remote att…
    CVE-2025-20128 (CVSS 5.3) — A vulnerability in the Object Linking and Embedding 2 (OLE2) decryption routine of ClamAV could allow an unaut…
    CVE-2024-20506 (CVSS 6.1) — A vulnerability in the ClamD service module of Clam AntiVirus (ClamAV) versions 1.4.0, 1.3.2 and prior version…
    CVE-2024-20505 (CVSS 4) — A vulnerability in the PDF parsing module of Clam AntiVirus (ClamAV) versions 1.4.0, 1.3.2 and prior versions,…
    CVE-2024-20380 (CVSS 7.5) — A vulnerability in the HTML parser of ClamAV could allow an unauthenticated, remote attacker to cause a denial…
    CVE-2024-20328 (CVSS 5.3) — A vulnerability in the VirusEvent feature of ClamAV could allow a local attacker to inject arbitrary commands …
    CVE-2022-20803 (CVSS 8.6) — A vulnerability in the OLE2 file parser of Clam AntiVirus (ClamAV) versions 0.104.0 through 0.104.2 could allo…
    CVE-2023-20052 (CVSS 5.3) — On Feb 15, 2023, the following vulnerability in the ClamAV scanning library was disclosed: A vulnerabilit…

    References

    http://kolab.org/security/kolab-vendor-notice-10.txt
    http://secunia.com/advisories/21368
    http://secunia.com/advisories/21374
    http://secunia.com/advisories/21433
    http://secunia.com/advisories/21443
    http://secunia.com/advisories/21457
    http://secunia.com/advisories/21497
    http://secunia.com/advisories/21562
    http://security.gentoo.org/glsa/glsa-200608-13.xml
    http://securitytracker.com/id?1016645
    http://www.clamav.net/security/0.88.4.html
    http://www.debian.org/security/2006/dsa-1153
    http://www.mandriva.com/security/advisories?name=MDKSA-2006:138
    http://www.novell.com/linux/security/advisories/2006_46_clamav.html
    http://www.overflow.pl/adv/clamav_upx_heap.txt
    http://www.securityfocus.com/archive/1/442681/100/0/threaded
    http://www.securityfocus.com/bid/19381
    http://www.trustix.org/errata/2006/0046/
    http://www.vupen.com/english/advisories/2006/3175
    http://www.vupen.com/english/advisories/2006/3275
    https://exchange.xforce.ibmcloud.com/vulnerabilities/28286
    http://kolab.org/security/kolab-vendor-notice-10.txt
    http://secunia.com/advisories/21368
    http://secunia.com/advisories/21374
    http://secunia.com/advisories/21433
    http://secunia.com/advisories/21443
    http://secunia.com/advisories/21457
    http://secunia.com/advisories/21497
    http://secunia.com/advisories/21562
    http://security.gentoo.org/glsa/glsa-200608-13.xml
    http://securitytracker.com/id?1016645
    http://www.clamav.net/security/0.88.4.html
    http://www.debian.org/security/2006/dsa-1153
    http://www.mandriva.com/security/advisories?name=MDKSA-2006:138
    http://www.novell.com/linux/security/advisories/2006_46_clamav.html
    http://www.overflow.pl/adv/clamav_upx_heap.txt
    http://www.securityfocus.com/archive/1/442681/100/0/threaded
    http://www.securityfocus.com/bid/19381
    http://www.trustix.org/errata/2006/0046/
    http://www.vupen.com/english/advisories/2006/3175
    http://www.vupen.com/english/advisories/2006/3275
    https://exchange.xforce.ibmcloud.com/vulnerabilities/28286

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High