TP-LINK TL-WA850RE 5 /data/syslog.filter.json Type memory corruption

Summaryinfo

A vulnerability, which was classified as critical, was found in TP-LINK TL-WA850RE 5. Impacted is an unknown function of the file /data/syslog.filter.json. Such manipulation of the argument Type as part of Parameter leads to memory corruption. This vulnerability is listed as CVE-2018-12693. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability, which was classified as critical, has been found in TP-LINK TL-WA850RE 5 (Router Operating System). Affected by this issue is some unknown functionality of the file /data/syslog.filter.json. The manipulation of the argument type as part of a Parameter leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Stack-based buffer overflow in TP-Link TL-WA850RE Wi-Fi Range Extender with hardware version 5 allows remote authenticated users to cause a denial of service (outage) via a long type parameter to /data/syslog.filter.json.

The bug was discovered 04/26/2018. The weakness was presented 06/23/2018 (Website). The advisory is shared for download at medium.com. This vulnerability is handled as CVE-2018-12693 since 06/23/2018. The attack may be launched remotely. A simple authentication is required for exploitation. There are known technical details, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 58 days. During that time the estimated underground price was around $0-$5k. By approaching the search of inurl:data/syslog.filter.json it is possible to find vulnerable targets with Google Hacking.

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

See VDB-119829 for similar entry. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Router Operating System

Vendor

• TP-LINK

Name

• TL-WA850RE

Version

• 5

License

• commercial

Website

• Vendor: https://www.tp-link.com/

CPE 2.3info

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CPE 2.2info

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Once again VulDB remains the best source for vulnerability data.

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