CVE-2018-1000030

low
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Description

Python 2.7.14 is vulnerable to a Heap-Buffer-Overflow as well as a Heap-Use-After-Free. Python versions prior to 2.7.14 may also be vulnerable and it appears that Python 2.7.17 and prior may also be vulnerable however this has not been confirmed. The vulnerability lies when multiply threads are handling large amounts of data. In both cases there is essentially a race condition that occurs. For the Heap-Buffer-Overflow, Thread 2 is creating the size for a buffer, but Thread1 is already writing to the buffer without knowing how much to write. So when a large amount of data is being processed, it is very easy to cause memory corruption using a Heap-Buffer-Overflow. As for the Use-After-Free, Thread3->Malloc->Thread1->Free's->Thread2-Re-uses-Free'd Memory. The PSRT has stated that this is not a security vulnerability due to the fact that the attacker must be able to run code, however in some situations, such as function as a service, this vulnerability can potentially be used by an attacker to violate a trust boundary, as such the DWF feels this issue deserves a CVE.

References

https://bugs.python.org/issue31530

https://drive.google.com/file/d/1oyR9DAZjZK_SCn3mor6NRAYLJS6ueXaY/view

https://security.gentoo.org/glsa/201811-02

https://usn.ubuntu.com/3817-1/

https://usn.ubuntu.com/3817-2/

https://www.dropbox.com/sh/sj3ee7xv55j36k7/AADwP-YfOYikBMuy32e0uvPFa?dl=0

https://www.oracle.com/security-alerts/cpujan2020.html

Details

Source: MITRE

Published: 2018-02-08

Updated: 2020-08-24

Type: CWE-787

Risk Information

CVSS v2

Base Score: 3.3

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

Impact Score: 4.9

Exploitability Score: 3.4

Severity: LOW

CVSS v3

Base Score: 3.6

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

Impact Score: 2.5

Exploitability Score: 1

Severity: LOW

Tenable Plugins

View all (10 total)

IDNameProductFamilySeverity
133259SUSE SLED15 / SLES15 Security Update : python (SUSE-SU-2020:0234-1) (BEAST) (httpoxy)NessusSuSE Local Security Checks
critical
129212EulerOS 2.0 SP3 : python (EulerOS-SA-2019-2019)NessusHuawei Local Security Checks
critical
121820Photon OS 1.0: Python2 PHSA-2018-1.0-0125NessusPhotonOS Local Security Checks
low
118954Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS : Python vulnerabilities (USN-3817-1)NessusUbuntu Local Security Checks
critical
118846GLSA-201811-02 : Python: Buffer overflowNessusGentoo Local Security Checks
low
111929Photon OS 1.0: Python2 PHSA-2018-1.0-0125 (deprecated)NessusPhotonOS Local Security Checks
high
111297Photon OS 2.0 : Zsh / Python3 / Xerces / Mercurial / Pmd / Pycrypto / Net / Python2 / Util / Mysql / Paramiko / Binutils / Patch / Sqlite (PhotonOS-PHSA-2018-2.0-0037) (deprecated)NessusPhotonOS Local Security Checks
critical
110069openSUSE Security Update : python (openSUSE-2018-511)NessusSuSE Local Security Checks
critical
110037SUSE SLED12 / SLES12 Security Update : python (SUSE-SU-2018:1372-1)NessusSuSE Local Security Checks
critical
109476EulerOS 2.0 SP1 : python (EulerOS-SA-2018-1078)NessusHuawei Local Security Checks
low