Heap-based Buffer Overflow Affecting gpac4ios package, versions >=0.0.0
Snyk CVSS
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Test your applications- Snyk ID SNYK-COCOAPODS-GPAC4IOS-1567333
- published 19 Aug 2021
- disclosed 19 Aug 2021
- credit Cisco Talos
Introduced: 19 Aug 2021
CVE-2021-21843 Open this link in a new tabHow to fix?
There is no fixed version for GPAC4iOS.
Overview
GPAC4iOS is a GPAC4iOS is the libgpac library packaged for iOS as a Pod. It is preconfigured and tested to do a single task: create a MP4 file from a raw H.264 and an audio track.
Affected versions of this package are vulnerable to Heap-based Buffer Overflow. When reading each sub-segment, at line 40 the library will first read a 32-bit integer representing the number of ranges. These ranges are then checked against the size of the atom. Due to the size being 64-bit, this check is insufficient. After validating the number of ranges, at line 4] the library will multiply the count by the size of the GF_SubsegmentRangeInfo structure. On a 32-bit platform, this multiplication can result in an integer overflow causing the space of the array being allocated to be less than expected. During the initialization of this array at line 42, the library will write outside the bounds of the allocation resulting in a heap-based buffer overflow.