CVE-2022-48565
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Description
A flaw was found in Python caused by improper handling of XML external entity (XXE) declarations by the plistlib module. By using a specially crafted XML content, an attacker could obtain sensitive information by disclosing files specified by parsing URI, and may cause denial of service by resource exhaustion.
Statement
This vulnerability is classified as Moderate according to Red Hat's Severity Rating Classification, as in contrast to an Important severity rating, the conditions to exploit this vulnerability makes it highly improbable for a general remote use case to lead to arbitrary code execution or affect data integrity and the highest impact is data disclosure and application crash.
The versions of python as shipped with Red Hat Enterprise Linux 8 and Red Hat Enterprise Linux 9 either has fixed code or they just provide symlinks
to the main python3
component, which provides the interpreter of the Python programming language. Therefore, both Red Hat Enterprise Linux versions 8 and 9 are not affected.
Mitigation
The XML modules in python are not secure against erroneous or maliciously constructed data. If you need to parse untrusted or unauthenticated data, see the XML vulnerabilities and the defusedxml package sections.
Additional information
- Bugzilla 2240059: python: XML External Entity in XML processing plistlib module
- CWE-611: Improper Restriction of XML External Entity Reference
- FAQ: Frequently asked questions about CVE-2022-48565
Common Vulnerability Scoring System (CVSS) Score Details
Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
Red Hat | NVD | |
---|---|---|
CVSS v3 Base Score | 7.8 | 9.8 |
Attack Vector | Local | Network |
Attack Complexity | Low | Low |
Privileges Required | Low | None |
User Interaction | None | None |
Scope | Unchanged | Unchanged |
Confidentiality Impact | High | High |
Integrity Impact | High | High |
Availability Impact | High | High |
CVSS v3 Vector
Red Hat: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Red Hat CVSS v3 Score Explanation
This vulnerability can only be exploited by parsing a vulnerable .plist file, which is why attack vector has been marked as local.
Frequently Asked Questions
Why is Red Hat's CVSS v3 score or Impact different from other vendors?
For more information, see https://access.redhat.com/solutions/762393.
My product is listed as "Under investigation" or "Affected", when will Red Hat release a fix for this vulnerability?
- "Under investigation" doesn't necessarily mean that the product is affected by this vulnerability. It only means that our Analysis Team is still working on determining whether the product is affected and how it is affected.
- "Affected" means that our Analysis Team has determined that this product is affected by this vulnerability and might release a fix to address this in the near future.
What can I do if my product is listed as "Will not fix"?
Available options depend mostly on the Impact of the vulnerability and the current Life Cycle phase of your product. Overall, you have the following options:
- Upgrade to a supported product version that includes a fix for this vulnerability (recommended).
- Apply a mitigation (if one exists).
- Open a support case to request a prioritization of releasing a fix for this vulnerability.
What can I do if my product is listed as "Fix deferred"?
Available options depend mostly on the Impact of the vulnerability and the current Life Cycle phase of your product. Overall, you have the following options:
- Apply a mitigation (if one exists).
- Open a support case to request a prioritization of releasing a fix for this vulnerability.
- Red Hat Engineering focuses on addressing high-priority issues based on their complexity or limited lifecycle support. Therefore, lower-priority issues will not receive immediate fixes.
What is a mitigation?
I have a Red Hat product but it is not in the above list, is it affected?
Why is my security scanner reporting my product as vulnerable to this vulnerability even though my product version is fixed or not affected?
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