A vulnerability has been found in netpbm up to 10.81.03 and classified as critical. This vulnerability affects the function pm_mallocarray2 in the library lib/util/mallocvar.c. The manipulation as part of a Image File leads to a memory corruption vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

The pm_mallocarray2 function in lib/util/mallocvar.c in Netpbm through 10.81.03 allows remote attackers to cause a denial of service (heap-based buffer over-read) via a crafted image file, as demonstrated by pbmmask.

The bug was discovered 03/23/2018. The weakness was presented 03/25/2018 (Website). The advisory is shared for download at github.com. This vulnerability was named CVE-2018-8975 since 03/24/2018. The attack can be initiated remotely. No form of authentication is required for a successful 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 1 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 172274 (OpenSUSE Security Update for netpbm (openSUSE-SU-2019:1200-1)).

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

Once again VulDB remains the best source for vulnerability data.

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• netpbm

Version

• 10.81.03

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CPE 2.2info

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