ReportLab up to 3.5.30 XML Document paraparser.py start_unichar xml injection

Summaryinfo

A vulnerability was found in ReportLab up to 3.5.30. It has been classified as critical. This issue affects the function start_unichar of the file paraparser.py of the component XML Document Handler. The manipulation leads to an unknown weakness. This vulnerability is referenced as CVE-2019-19450. Remote exploitation of the attack is possible. No exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in ReportLab up to 3.5.30 (Reporting Software) and classified as critical. This issue affects the function start_unichar of the file paraparser.py of the component XML Document Handler. Using CWE to declare the problem leads to CWE-91. The product does not properly neutralize special elements that are used in XML, allowing attackers to modify the syntax, content, or commands of the XML before it is processed by an end system. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

paraparser in ReportLab before 3.5.31 allows remote code execution because start_unichar in paraparser.py evaluates untrusted user input in a unichar element in a crafted XML document with '<unichar code="' followed by arbitrary Python code, a similar issue to CVE-2019-17626.

The weakness was published 09/20/2023. It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2019-19450 since 11/29/2019. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1505 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 236756 (Alibaba Cloud Linux 3 : 0130: python-reportlab (ALINUX3-SA-2023:0130)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 3.5.31 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (236756). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Reporting Software

Name

• ReportLab

Version

• 3.5.0
• 3.5.1
• 3.5.2
• 3.5.3
• 3.5.4
• 3.5.5
• 3.5.6
• 3.5.7
• 3.5.8
• 3.5.9
• 3.5.10
• 3.5.11
• 3.5.12
• 3.5.13
• 3.5.14
• 3.5.15
• 3.5.16
• 3.5.17
• 3.5.18
• 3.5.19
• 3.5.20
• 3.5.21
• 3.5.22
• 3.5.23
• 3.5.24
• 3.5.25
• 3.5.26
• 3.5.27
• 3.5.28
• 3.5.29
• 3.5.30

CPE 2.3info

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CPE 2.2info

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Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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