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CVE-2008-1721

44
FAUCET Score

CVE-2008-1721 is an integer signedness error in the zlib extension module of Python 2.5.2 and earlier, affecting various Linux distributions including Canonical and Debian. This vulnerability allows remote attackers to execute arbitrary code by supplying a negative signed integer, leading to insufficient memory allocation and a buffer overflow. With a CVSS score of 7.5, it is considered highly severe due to its network-based attack vector, low attack complexity, and potential for partial confidentiality, integrity, and availability impact. While not actively exploited in the wild, an exploit is available on ExploitDB, and there is minimal community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 2.4.0, < 2.4.6CPE matchmatch criteria
cpe:2.3:a:python:python:*:*:*:*:*:*:*:*
>= 2.5.0, <= 2.5.2CPE matchmatch criteria
cpe:2.3:a:python:python:*:*:*:*:*:*:*:*
4.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:4.0:*:*:*:*:*:*:*
6.06CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:6.06:*:*:*:*:*:*:*
7.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:7.04:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.5HIGH

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

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
22.62%
Probability of exploitation in next 30 days
EPSS Percentile
97.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
ExploitDB: EDB-31634 · Apr 9, 2008
This CVE's current EPSS score of 0.2262 is in the 96th percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: python-0:2.3.4-14.7.el4_8.2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: python-0:2.4.3-24.el5_3.6
View patch

Vendor Advisories (1)

redhatCVE-2008-1721Low

python: integer signedness error in the zlib extension module

Apr 9, 2008

References

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