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Vulnerability record · CVE-2006-4336 · published 19 September 2006

CVE-2006-4336: Gzip vulnerability

Gzip · Gzip

Buffer underflow in the build_tree function in unpack.c in gzip 1.3.5 allows context-dependent attackers to execute arbitrary code via a crafted leaf count table that causes a write to a negative index.

7.5 CVSS 2.0 High EPSS 5.9% · top 7.1%
7.5CVSS 2.0 base score
5.9%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
114References
16 Jun 2026Last modified by NVD

Description

Buffer underflow in the build_tree function in unpack.c in gzip 1.3.5 allows context-dependent attackers to execute arbitrary code via a crafted leaf count table that causes a write to a negative index.

AV:N/AC:L/Au:N/C:P/I:P/A:P

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
ftp://patches.sgi.com/support/free/security/advisories/20061001-01-P.asc
http://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=204676
http://docs.info.apple.com/article.html?artnum=304829
http://lists.apple.com/archives/security-announce/2006/Nov/msg00001.html
http://secunia.com/advisories/21996
http://secunia.com/advisories/22002
http://secunia.com/advisories/22009 Vendor Advisory
http://secunia.com/advisories/22012 PatchVendor Advisory
http://secunia.com/advisories/22017 Vendor Advisory
http://secunia.com/advisories/22027
http://secunia.com/advisories/22033 Vendor Advisory
http://secunia.com/advisories/22034 Vendor Advisory
http://secunia.com/advisories/22043 PatchVendor Advisory
http://secunia.com/advisories/22085
http://secunia.com/advisories/22101
http://secunia.com/advisories/22435
http://secunia.com/advisories/22487
http://secunia.com/advisories/22661
http://secunia.com/advisories/23153
http://secunia.com/advisories/23155
http://secunia.com/advisories/23156
http://secunia.com/advisories/23679
http://secunia.com/advisories/24435
http://secunia.com/advisories/24636
http://security.freebsd.org/advisories/FreeBSD-SA-06:21.gzip.asc
http://security.gentoo.org/glsa/glsa-200609-13.xml
http://securitytracker.com/id?1016883
http://slackware.com/security/viewer.php?l=slackware-security&y=2006&m=slackware-security.555852
http://sunsolve.sun.com/search/document.do?assetkey=1-26-102766-1
http://support.avaya.com/elmodocs2/security/ASA-2006-218.htm
http://www.gentoo.org/security/en/glsa/glsa-200611-24.xml
http://www.kb.cert.org/vuls/id/554780 US Government Resource
http://www.mandriva.com/security/advisories?name=MDKSA-2006:167
http://www.novell.com/linux/security/advisories/2006_56_gzip.html
http://www.openpkg.org/security/advisories/OpenPKG-SA-2006.020-gzip.html
http://www.redhat.com/support/errata/RHSA-2006-0667.html
http://www.securityfocus.com/archive/1/446426/100/0/threaded
http://www.securityfocus.com/archive/1/450078/100/0/threaded
http://www.securityfocus.com/archive/1/451324/100/0/threaded
http://www.securityfocus.com/archive/1/462007/100/0/threaded

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

7.5CVE-2006-4335Gzip vulnerabilityArray index error in the make_table function in unlzh.c in the LZH decompression component in gzip 1.3.5, when running on certain platforms, allows c…EPSS 5.8%7.5CVE-2006-4337Gzip vulnerabilityBuffer overflow in the make_table function in the LHZ component in gzip 1.3.5 allows context-dependent attackers to execute arbitrary code via a craf…EPSS 6.0%5.0CVE-2006-4334Gzip vulnerabilityUnspecified vulnerability in gzip 1.3.5 allows context-dependent attackers to cause a denial of service (crash) via a crafted GZIP (gz) archive, whic…EPSS 4.1%5.0CVE-2006-4338Gzip vulnerabilityunlzh.c in the LHZ component in gzip 1.3.5 allows context-dependent attackers to cause a denial of service (infinite loop) via a crafted GZIP archive.EPSS 3.8%

Source: NIST National Vulnerability Database (record CVE-2006-4336), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.