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Vulnerability Details : CVE-2008-1721

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.
Publish Date : 2008-04-10 Last Update Date : 2018-10-11
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- CVSS Scores & Vulnerability Types

CVSS Score
Confidentiality Impact Partial (There is considerable informational disclosure.)
Integrity Impact Partial (Modification of some system files or information is possible, but the attacker does not have control over what can be modified, or the scope of what the attacker can affect is limited.)
Availability Impact Partial (There is reduced performance or interruptions in resource availability.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Execute CodeOverflow
CWE ID 189

- Vendor Statements

Red Hat is aware of this issue and is tracking it via the following bug: The Red Hat Security Response Team has rated this issue as having low security impact, a future update may address this flaw. More information regarding issue severity can be found here:
Source: Redhat

- Additional Vendor Supplied Data

Vendor Impact CVSS Score CVSS Vector Report Date Publish Date
Redhat low 2008-04-09 2008-04-09
If you are a vendor and you have additional data which can be automatically imported into our database, please contact admin @

- Related OVAL Definitions

Title Definition Id Class Family
DSA-1551 python2.4 -- several vulnerabilities oval:org.mitre.oval:def:8152 unix
DSA-1551-1 python2.4 - several vulnerabilities oval:org.mitre.oval:def:18481 unix
DSA-1620 python2.5 -- several vulnerabilities oval:org.mitre.oval:def:7981 unix
DSA-1620-1 python2.5 - several vulnerabilities oval:org.mitre.oval:def:20188 unix
ELSA-2009:1176: python security update (Moderate) oval:org.mitre.oval:def:22809 unix
Integer signedness error in the zlib extension module in Python 2.5.2 and earlier allows remote attackers to execute arb... oval:org.mitre.oval:def:9407 unix
Multiple Buffer and Integer Overflow Vulnerabilities in Python (python(1)) May Lead to a Denial of Service (DoS) or Allo... oval:org.mitre.oval:def:8249 unix
RHSA-2009:1176 -- python security update (Moderate) oval:org.mitre.oval:def:29294 unix
RHSA-2009:1176: python security update (Moderate) oval:com.redhat.rhsa:def:20091176 unix
RHSA-2009:1177: python security update (Moderate) oval:com.redhat.rhsa:def:20091177 unix
VMware python zlib extension module vulnerability oval:org.mitre.oval:def:8494 unix
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2008-1721

# Product Type Vendor Product Version Update Edition Language
1 Application Python Software Foundation Python 2.5.2 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Python Software Foundation Python 1

- References For CVE-2008-1721 CONFIRM
XF zlib-pystringfromstringandsize-bo(41748)
VUPEN ADV-2009-3316
VUPEN ADV-2008-1229
GENTOO GLSA-200807-01
SECTRACK 1019823
BID 28715 Python zlib Module Remote Buffer Overflow Vulnerability Release Date:2013-01-30
BUGTRAQ 20091120 VMSA-2009-0016 VMware vCenter and ESX update release and vMA patch release address multiple security issue in third party components
BUGTRAQ 20080409 IOActive Security Advisory: Buffer overflow in Python zlib extension module CONFIRM CONFIRM
SLACKWARE SSA:2008-217-01

- Metasploit Modules Related To CVE-2008-1721

There are not any metasploit modules related to this CVE entry (Please visit for more information)

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