Apple iOS up to 12.3.2 libxslt type confusion

Summaryinfo

A vulnerability labeled as problematic has been found in Apple iOS up to 12.3.2. Affected by this vulnerability is an unknown functionality of the component libxslt. The manipulation results in input validation. This vulnerability is identified as CVE-2019-13118. The attack can be executed remotely. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Apple iOS up to 12.3.2 (Smartphone Operating System). Affected is an unknown part of the component libxslt. The manipulation with an unknown input leads to a input validation 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. CVE summarizes:

In numbers.c in libxslt 1.1.33, a type holding grouping characters of an xsl:number instruction was too narrow and an invalid character/length combination could be passed to xsltNumberFormatDecimal, leading to a read of uninitialized stack data.

The weakness was released 07/22/2019 as HT210346 as confirmed advisory (Website). The advisory is available at support.apple.com. This vulnerability is traded as CVE-2019-13118 since 06/30/2019. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $5k-$25k at the moment (estimation calculated on 05/29/2026). It is expected to see the exploit prices for this product increasing in the near future. The advisory points out:

A stack overflow was addressed with improved input validation.

Upgrading to version 12.4 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

Entries connected to this vulnerability are available at VDB-137112, VDB-137113, VDB-138544 and VDB-138575. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• Smartphone Operating System

Vendor

• Apple

Name

• iOS

Version

• 12.3.0
• 12.3.1
• 12.3.2

License

• commercial

Website

• Vendor: https://www.apple.com/

CPE 2.3info

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CPE 2.2info

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Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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