CVE-2017-1000158

Name: CVE-2017-1000158
Creator: NVD / NIST
Published: 2017-11-17T05:29:00.28+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 7.94%

Last modified Jun 17, 2026

CVE-2017-1000158 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. CPython (aka Python) up to 2.7.13 is vulnerable to an integer overflow in the PyString_DecodeEscape function in stringobject.c, resulting in heap-based buffer overflow (and possible arbitrary code execution). EPSS estimates a 7.94% chance of exploitation in the next 30 days.

Description

CPython (aka Python) up to 2.7.13 is vulnerable to an integer overflow in the PyString_DecodeEscape function in stringobject.c, resulting in heap-based buffer overflow (and possible arbitrary code execution)

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

7.94%

94.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-190

Affected Software

Vendor	Product	Versions
Python	Python	< 2.7.15
Python	Python	>= 3.4.0, < 3.4.8
Python	Python	>= 3.5.0, < 3.5.5
Debian	Debian Linux	7.0
Debian	Debian Linux	8.0
Debian	Debian Linux	9.0

References

http://www.securitytracker.com/id/1039890Third Party Advisory, VDB Entry
https://bugs.python.org/issue30657Issue Tracking, Patch, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2017/11/msg00035.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2017/11/msg00036.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/09/msg00030.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/09/msg00031.htmlMailing List, Third Party Advisory
https://security.gentoo.org/glsa/201805-02Third Party Advisory
https://security.netapp.com/advisory/ntap-20230216-0001/
https://www.debian.org/security/2018/dsa-4307Third Party Advisory
http://www.securitytracker.com/id/1039890Third Party Advisory, VDB Entry
https://bugs.python.org/issue30657Issue Tracking, Patch, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2017/11/msg00035.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2017/11/msg00036.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/09/msg00030.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/09/msg00031.htmlMailing List, Third Party Advisory
https://security.gentoo.org/glsa/201805-02Third Party Advisory
https://security.netapp.com/advisory/ntap-20230216-0001/
https://www.debian.org/security/2018/dsa-4307Third Party Advisory

Timeline

Published: Nov 17, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-1000158?

How severe is CVE-2017-1000158?

CVE-2017-1000158 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 7.94% probability of exploitation in the next 30 days.

How do I fix CVE-2017-1000158?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2017-1000158?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST