libsixel 1.8.2 tosixel.c dither_func_fs heap-based overflow

Summaryinfo

A vulnerability, which was classified as critical, has been found in libsixel 1.8.2. This affects the function dither_func_fs of the file tosixel.c. Performing a manipulation results in heap-based overflow. This vulnerability was named CVE-2020-21547. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability, which was classified as critical, was found in libsixel 1.8.2. This affects the function dither_func_fs of the file tosixel.c. The manipulation with an unknown input leads to a heap-based overflow vulnerability. CWE is classifying the issue as CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). This is going to have an impact on confidentiality, integrity, and availability.

The weakness was presented 09/18/2021. It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2020-21547 since 08/13/2020. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/18/2021).

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

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Productinfo

Name

• libsixel

Version

• 1.8.2

License

• open-source

CPE 2.3info

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CPE 2.2info

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