CVE-2019-20907
HIGH severity · CVSS 7.5 · CWE-835
7.5CVSS HIGH
Summary
In Lib/tarfile.py in Python through 3.8.3, an attacker is able to craft a TAR archive leading to an infinite loop when opened by tarfile.open, because _proc_pax lacks header validation.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
Confidentiality impactNone
Integrity impactNone
Availability impactHigh
Exploit probability (EPSS)6%
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products we track (1)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Official patch: https://github.com/python/cpython/pull/21454 ↗
Additional information
- NVD record
- https://github.com/python/cpython/pull/21454Patch
- https://bugs.python.org/issue39017Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00051.htmlAdvisory
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00052.htmlAdvisory
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00053.htmlAdvisory
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00056.htmlAdvisory
- https://lists.debian.org/debian-lts-announce/2020/08/msg00034.htmlAdvisory
- https://lists.debian.org/debian-lts-announce/2020/11/msg00032.htmlAdvisory