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CVE-2017-1000158

34
FAUCET Score

CVE-2017-1000158 is a critical integer overflow vulnerability in the PyString_DecodeEscape function of CPython (Python up to version 2.7.13), affecting Debian Linux and Python installations. This flaw can lead to a heap-based buffer overflow and potential arbitrary code execution. With a CVSS score of 9.8, it is highly severe, requiring no user interaction or authentication, and can be exploited remotely over the network. Despite its critical nature, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.7.15CPE matchmatch criteria
cpe:2.3:a:python:python:*:*:*:*:*:*:*:*
>= 3.4.0, < 3.4.8CPE matchmatch criteria
cpe:2.3:a:python:python:*:*:*:*:*:*:*:*
>= 3.5.0, < 3.5.5CPE matchmatch criteria
cpe:2.3:a:python:python:*:*:*:*:*:*:*:*
7.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
8.23%
Probability of exploitation in next 30 days
EPSS Percentile
94.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0823 is in the 90th percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (6)

redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: python
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: python
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: python
redhatend of lifevia redhat_api
Product: Red Hat Software CollectionsFixed in: python27-python
redhatend of lifevia redhat_api
Product: Red Hat Software CollectionsFixed in: rh-python34-python
redhatend of lifevia redhat_api
Product: Red Hat Software CollectionsFixed in: rh-python35-python

Vendor Advisories (1)

redhatCVE-2017-1000158Moderate

python: Integer overflow in PyString_DecodeEscape results in heap-base buffer overflow

Jun 13, 2017

References

bugs.python.org / issue30657
Issue TrackingPatchVendor Advisory
lists.debian.org / debian-lts-announce/2017/11/msg00035.html
Mailing ListThird Party Advisory
lists.debian.org / debian-lts-announce/2017/11/msg00036.html
Mailing ListThird Party Advisory
lists.debian.org / debian-lts-announce/2018/09/msg00030.html
Mailing ListThird Party Advisory
lists.debian.org / debian-lts-announce/2018/09/msg00031.html
Mailing ListThird Party Advisory
security.gentoo.org / glsa/201805-02
Third Party Advisory
security.netapp.com / advisory/ntap-20230216-0001
debian.org / security/2018/dsa-4307
Third Party Advisory
securitytracker.com / id/1039890
Third Party AdvisoryVDB Entry