libxslt up to 1.1.32 xsltNumberFormatGetMultipleLevel XML Data type confusion

Summaryinfo

A vulnerability was found in libxslt up to 1.1.32. It has been rated as critical. Affected is the function xsltNumberFormatGetMultipleLevel. Performing a manipulation as part of XML Data results in type confusion. This vulnerability is reported as CVE-2019-5815. The attack is possible to be carried out remotely. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as critical, was found in libxslt up to 1.1.32. This affects the function xsltNumberFormatGetMultipleLevel. The manipulation as part of a XML Data leads to a type confusion vulnerability. CWE is classifying the issue as CWE-843. The product allocates or initializes a resource such as a pointer, object, or variable using one type, but it later accesses that resource using a type that is incompatible with the original type. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Type confusion in xsltNumberFormatGetMultipleLevel prior to libxslt 1.1.33 could allow attackers to potentially exploit heap corruption via crafted XML data.

The bug was discovered 04/23/2019. The weakness was disclosed 12/11/2019. This vulnerability is uniquely identified as CVE-2019-5815 since 01/09/2019. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are known, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 232 days. During that time the estimated underground price was around $0-$5k. The commercial vulnerability scanner Qualys is able to test this issue with plugin 237198 (Red Hat Update for chromium-browser (RHSA-2019:1021)).

Upgrading to version 1.1.33 eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

• libxslt

Version

• 1.1.0
• 1.1.1
• 1.1.2
• 1.1.3
• 1.1.4
• 1.1.5
• 1.1.6
• 1.1.7
• 1.1.8
• 1.1.9
• 1.1.10
• 1.1.11
• 1.1.12
• 1.1.13
• 1.1.14
• 1.1.15
• 1.1.16
• 1.1.17
• 1.1.18
• 1.1.19
• 1.1.20
• 1.1.21
• 1.1.22
• 1.1.23
• 1.1.24
• 1.1.25
• 1.1.26
• 1.1.27
• 1.1.28
• 1.1.29
• 1.1.30
• 1.1.31
• 1.1.32

CPE 2.3info

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CPE 2.2info

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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