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Vulnerability record · CVE-2008-1721 · published 10 April 2008

CVE-2008-1721: Python vulnerability

Python · Python

Integer signedness error in the zlib extension module in Python 2.5.2 and earlier allows remote attackers to execute arbitrary code via a negative signed integer, which triggers insufficient memory allocation and a buffer overflow.

7.5 CVSS 2.0 High EPSS 23% · top 2.4% CWE-681 · CWE-681
7.5CVSS 2.0 base score
23%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
66References, 2 tagged exploit
16 Jun 2026Last modified by NVD

Description

Integer signedness error in the zlib extension module in Python 2.5.2 and earlier allows remote attackers to execute arbitrary code via a negative signed integer, which triggers insufficient memory allocation and a buffer overflow.

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

Affected products

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

References

LinkTags
http://bugs.python.org/issue2586 Issue TrackingVendor Advisory
http://lists.apple.com/archives/security-announce/2009/Feb/msg00000.html Mailing ListThird Party Advisory
http://secunia.com/advisories/29889 Not Applicable
http://secunia.com/advisories/29955 Not Applicable
http://secunia.com/advisories/30872 Not Applicable
http://secunia.com/advisories/31255 Not Applicable
http://secunia.com/advisories/31358 Not Applicable
http://secunia.com/advisories/31365 Not Applicable
http://secunia.com/advisories/33937 Not Applicable
http://secunia.com/advisories/37471 Not Applicable
http://secunia.com/advisories/38675 Not Applicable
http://security.gentoo.org/glsa/glsa-200807-01.xml Third Party Advisory
http://securityreason.com/securityalert/3802 ExploitThird Party Advisory
http://slackware.com/security/viewer.php?l=slackware-security&y=2008&m=slackware-security.525289 Third Party Advisory
http://support.apple.com/kb/HT3438 Third Party Advisory
http://support.avaya.com/css/P8/documents/100074697 Third Party Advisory
http://wiki.rpath.com/wiki/Advisories:rPSA-2008-0149 Broken Link
http://www.debian.org/security/2008/dsa-1551 Third Party Advisory
http://www.debian.org/security/2008/dsa-1620 Third Party Advisory
http://www.mandriva.com/security/advisories?name=MDVSA-2008:085 Permissions Required
http://www.securityfocus.com/archive/1/490690/100/0/threaded Third Party AdvisoryVDB Entry
http://www.securityfocus.com/archive/1/507985/100/0/threaded Third Party AdvisoryVDB Entry
http://www.securityfocus.com/bid/28715 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id?1019823 Broken LinkThird Party AdvisoryVDB Entry
http://www.ubuntu.com/usn/usn-632-1 Third Party Advisory
http://www.vmware.com/security/advisories/VMSA-2009-0016.html Third Party Advisory
http://www.vupen.com/english/advisories/2008/1229/references Permissions Required
http://www.vupen.com/english/advisories/2009/3316 Permissions Required
https://exchange.xforce.ibmcloud.com/vulnerabilities/41748 Third Party AdvisoryVDB Entry
https://issues.rpath.com/browse/RPL-2444 Broken Link
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A8249 Third Party Advisory
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A8494 Broken Link
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9407 Third Party Advisory
http://bugs.python.org/issue2586 Issue TrackingVendor Advisory
http://lists.apple.com/archives/security-announce/2009/Feb/msg00000.html Mailing ListThird Party Advisory
http://secunia.com/advisories/29889 Not Applicable
http://secunia.com/advisories/29955 Not Applicable
http://secunia.com/advisories/30872 Not Applicable
http://secunia.com/advisories/31255 Not Applicable
http://secunia.com/advisories/31358 Not Applicable

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Source: NIST National Vulnerability Database (record CVE-2008-1721), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.