VDB-114175 · CVE-2018-1000117 · BID 102678

Python Software Foundation CPython up to 3.6.4 on Windows os.symlink Symlink memory corruption

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CTI Interest Score
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A vulnerability classified as critical was found in Python Software Foundation CPython up to 3.6.4 on Windows (Programming Language Software). Affected by this vulnerability is the function os.symlink. The manipulation as part of a Symlink leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Python Software Foundation CPython version From 3.2 until 3.6.4 on Windows contains a Buffer Overflow vulnerability in os.symlink() function on Windows that can result in Arbitrary code execution, likely escalation of privilege. This attack appears to be exploitable via a python script that creates a symlink with an attacker controlled name or location. This vulnerability appears to have been fixed in 3.7.0 and 3.6.5.

The bug was discovered 03/07/2018. The weakness was published 03/07/2018 (Website). It is possible to read the advisory at bugs.python.org. This vulnerability is known as CVE-2018-1000117 since 03/07/2018. The exploitation appears to be easy. Attacking locally is a requirement. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 111297 (Photon OS 2.0 : Zsh / Python3 / Xerces / Mercurial / Pmd / Pycrypto / Net / Python2 / Util / Mysql / Paramiko / Binutils / Patch / Sqlite (PhotonOS-PHSA-2018-2.0-0037) (deprecated)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family PhotonOS Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 371122 (Python Multiple Versions Buffer Overflow vulnerability).

Upgrading to version 3.6.5 or 3.7.0 eliminates this vulnerability. A possible mitigation has been published 2 months after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (111297).







CPE 2.3info

CPE 2.2info


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VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.3

VulDB Base Score: 4.2
VulDB Temp Score: 4.0
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NVD Base Score: 6.7
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Class: Memory corruption
CWE: CWE-119
ATT&CK: Unknown

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

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Nessus ID: 111297
Nessus Name: Photon OS 2.0 : Zsh / Python3 / Xerces / Mercurial / Pmd / Pycrypto / Net / Python2 / Util / Mysql / Paramiko / Binutils / Patch / Sqlite (PhotonOS-PHSA-2018-2.0-0037) (deprecated)
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Threat Intelligenceinfo

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Recommended: Upgrade
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Upgrade: CPython 3.6.5/3.7.0
Patch: github.com


03/07/2018 🔍
03/07/2018 +0 days 🔍
03/07/2018 +0 days 🔍
03/07/2018 +0 days 🔍
03/08/2018 +1 days 🔍
04/23/2018 +46 days 🔍
07/24/2018 +92 days 🔍
02/17/2023 +1669 days 🔍


Advisory: bugs.python.org
Status: Not defined
Confirmation: 🔍

CVE: CVE-2018-1000117 (🔍)

SecurityFocus: 102678


Created: 03/08/2018 07:49 AM
Updated: 02/17/2023 09:57 AM
Changes: 03/08/2018 07:49 AM (67), 01/11/2020 09:43 AM (8), 02/17/2023 09:52 AM (4), 02/17/2023 09:57 AM (1)
Complete: 🔍


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