A vulnerability, which was classified as critical, has been found in xtimor NMEA Library 0.5.3 (Software Library). Affected by this issue is the function nmea_parse of the file parser.c. The manipulation with an unknown input 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:

A stack-based buffer overflow was discovered in the xtimor NMEA library (aka nmealib) 0.5.3. nmea_parse() in parser.c allows an attacker to trigger denial of service (even arbitrary code execution in a certain context) in a product using this library via malformed data.

The bug was discovered 09/18/2018. The weakness was disclosed 09/21/2018 (Website). The advisory is available at cnblogs.com. This vulnerability is handled as CVE-2018-17174 since 09/18/2018. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 3 days. During that time the estimated underground price was around $0-$5k.

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

Productinfo

Type

• Software Library

Vendor

• xtimor

Name

• NMEA Library

Version

• 0.5.3

CPE 2.3info

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CPE 2.2info

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