Improper input validation in Python - CVE-2018-1061

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Main Vulnerability Database Vulnerabilities #VU12282

Improper input validation in Python - CVE-2018-1061

Published: April 27, 2018


Vulnerability identifier: #VU12282
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2018-1061
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to cause DoS condition on he target system.

The weakness exists due to the way catastrophic backtracking was implemented in python's difflib.IS_LINE_JUNK method difflib. A remote attacker can cause the service to crash.

Affected software

Python
Amazon Linux AMI
Red Hat Enterprise Linux for Scientific Computing
Fedora
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux Server - TUS
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux for Power, big endian - Extended Update Support
Red Hat Enterprise Linux EUS Compute Node
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux for Power
Slackware Linux
Ubuntu
Opensuse
Red Hat Software Collections
python2.7 (Debian package)
python (Red Hat package)
python2-tkinter (Alpine package)
python3.5 (Debian package)
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
Red Hat Enterprise Linux Server for x86_64 - Update Services for SAP Solutions
python3.5-minimal (Ubuntu package)
python3.8 (Ubuntu package)
python3.8-minimal (Ubuntu package)
python3.9 (Ubuntu package)
python3.9-minimal (Ubuntu package)
python3.11-minimal (Ubuntu package)
python3.6 (Ubuntu package)
python3.11 (Ubuntu package)
python3.6-minimal (Ubuntu package)
python3.7 (Ubuntu package)
python3.7-minimal (Ubuntu package)
python3.5 (Ubuntu package)
python27-python-jinja2 (Red Hat package)
python27-python (Red Hat package)
python34
python35
python3-docs
python3
python3.10 (Ubuntu package)
python3.10-minimal (Ubuntu package)
python3.12 (Ubuntu package)
python3.12-minimal (Ubuntu package)
python-pip

How to mitigate CVE-2018-1061

Update to version 3.6.5.

python2.7 (Debian package) - update to 2.7.13-2+deb9u3
python (Red Hat package) - addressed in versions 2.7.5-63.el7_4, 2.7.5-74.el7_5
python2-tkinter (Alpine package) - update to 2.7.15-r3
python3.5 (Debian package) - update to 3.5.3-1+deb9u1
python3.5-minimal (Ubuntu package) - update to Ubuntu Pro
python3.8 (Ubuntu package) - addressed in versions Ubuntu Pro, 3.8.10-0ubuntu1~20.04.10
python3.8-minimal (Ubuntu package) - addressed in versions Ubuntu Pro, 3.8.10-0ubuntu1~20.04.10
python3.9 (Ubuntu package) - update to Ubuntu Pro
python3.9-minimal (Ubuntu package) - update to Ubuntu Pro
python3.11-minimal (Ubuntu package) - addressed in versions Ubuntu Pro, 3.11.6-3ubuntu0.1
python3.6 (Ubuntu package) - update to Ubuntu Pro
python3.11 (Ubuntu package) - addressed in versions Ubuntu Pro, 3.11.6-3ubuntu0.1
python3.6-minimal (Ubuntu package) - update to Ubuntu Pro
python3.7 (Ubuntu package) - update to Ubuntu Pro
python3.7-minimal (Ubuntu package) - update to Ubuntu Pro
python3.5 (Ubuntu package) - update to Ubuntu Pro (Infra-only)
python27-python-jinja2 (Red Hat package) - addressed in versions 2.6-12.el6, 2.6-15.el7
python27-python (Red Hat package) - addressed in versions 2.7.16-4.el6, 2.7.16-4.el7
python34 - addressed in versions 3.4.9-1.el7, 3.4.9-2.fc27, 3.4.9-2.fc28
python35 - addressed in versions 3.5.7-1.fc28, 3.5.7-1.fc29, 3.5.7-1.fc30
python3-docs - addressed in versions 3.6.5-1.fc26, 3.6.5-1.fc27
python3 - addressed in versions 3.6.5-1.fc26, 3.6.5-1.fc27, 3.6.5-1.fc28
python3.10 (Ubuntu package) - update to 3.10.12-1~22.04.4
python3.10-minimal (Ubuntu package) - update to 3.10.12-1~22.04.4
python3.12 (Ubuntu package) - update to 3.12.0-1ubuntu0.1
python3.12-minimal (Ubuntu package) - update to 3.12.0-1ubuntu0.1
python-pip - addressed in versions 9.0.3-1.fc26, 9.0.3-1.fc27

External References

Related Security Bulletins