What is CVE-2008-3143?

CVE-2008-3143 is a vulnerability in Python, classified under Integer Overflow or Wraparound. Published 2008-08-01.

Is CVE-2008-3143 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Integer overflow in Python

CVE-2008-3143

Multiple integer overflows in Python before 2.5.2 might allow context-dependent attackers to have an unknown impact via vectors related to (1) Include/pymem.h; (2) _csv.c, (3) _struct.c, (4) arraymodule.c, (5) audioop.c, (6) binascii.c, (7) cPickle.c, (8) cStringIO.c, (9) cjkcodecs/multibytecodec.c, (10) datetimemodule.c, (11) md5.c, (12) rgbimgmodule.c, and (13) stropmodule.c in Modules/; (14) bufferobject.c, (15) listobject.c, and (16) obmalloc.c in Objects/; (17) Parser/node.c; and (18) asdl.c, (19) ast.c, (20) bltinmodule.c, and (21) compile.c in Python/, as addressed by "checks for integer overflows, contributed by Google."

Vulnerability class: Integer Overflow

Published 2008-08-01 · last modified 2026-06-16.

CVSS v2 metric

CVSS v2 base score 7.5 (High). Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P. This CVE predates CVSS v3 and has no v3 score from NVD.

EPSS exploit prediction

EPSS: 0.031 (87.4th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 87th percentile — 87.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.035 · newest: 0.031 · change: -0.004

Affected products

Python

Weakness classification (CWE)

CWE-190 — Integer Overflow or Wraparound

Public proof-of-concept exploits

References

www.securityfocus.com/archive/1/495445/100/0/threaded (mailing-list, VDB Entry, Third Party Advisory)
lists.opensuse.org/opensuse-security-announce/2008-08/msg00006.html (vendor-advisory, Third Party Advisory)
www.vupen.com/english/advisories/2008/2288 (Third Party Advisory, vdb-entry, Broken Link)
secunia.com/advisories/32793 (Broken Link, third-party-advisory)
www.securityfocus.com/bid/30491 (VDB Entry, Third Party Advisory, vdb-entry)
svn.python.org/view (Vendor Advisory)
secunia.com/advisories/37471 (Broken Link, third-party-advisory)
secunia.com/advisories/31687 (Broken Link, third-party-advisory)
www.python.org/download/releases/2.5.2/NEWS.txt (Vendor Advisory)
www.vmware.com/security/advisories/VMSA-2009-0016.html (Third Party Advisory)

Frequently asked questions

What is CVE-2008-3143?: CVE-2008-3143 is a vulnerability in Python, classified under Integer Overflow or Wraparound. Published 2008-08-01.
Is CVE-2008-3143 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.