Linux Kernel up to 5.3.11 dbg.c alloc_sgtable resource consumption

Summaryinfo

A vulnerability identified as problematic has been detected in Linux Kernel up to 5.3.11. This issue affects the function alloc_sgtable of the file drivers/net/wireless/intel/iwlwifi/fw/dbg.c. Performing a manipulation results in resource consumption. This vulnerability is known as CVE-2019-19058. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Linux Kernel up to 5.3.11 (Operating System). This affects the function alloc_sgtable of the file drivers/net/wireless/intel/iwlwifi/fw/dbg.c. The manipulation with an unknown input leads to a resource consumption vulnerability. CWE is classifying the issue as CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. This is going to have an impact on availability. The summary by CVE is:

A memory leak in the alloc_sgtable() function in drivers/net/wireless/intel/iwlwifi/fw/dbg.c in the Linux kernel through 5.3.11 allows attackers to cause a denial of service (memory consumption) by triggering alloc_page() failures, aka CID-b4b814fec1a5.

The weakness was published 11/18/2019. This vulnerability is uniquely identified as CVE-2019-19058 since 11/18/2019. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 222856 (Linux Distros Unpatched Vulnerability : CVE-2019-19058), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Tenable (222856). Similar entries are available at VDB-145879, VDB-145878, VDB-145877 and VDB-145876. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 5.3.0
• 5.3.1
• 5.3.2
• 5.3.3
• 5.3.4
• 5.3.5
• 5.3.6
• 5.3.7
• 5.3.8
• 5.3.9
• 5.3.10
• 5.3.11

License

• open-source

Website

• Vendor: https://www.kernel.org/

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Entryinfo

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

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