What’s Vulnerable › Vulnerabilities

CVE-2019-20630

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-03-24 · updated 2026-06-17
• Weakness: CWE-125

Description

An issue was discovered in libgpac.a in GPAC before 0.8.0, as demonstrated by MP4Box. It contains a heap-based buffer over-read in BS_ReadByte (called from gf_bs_read_bit) in utils/bitstream.c that can cause a denial of service via a crafted MP4 file.

Affected products

• GPAC: before 0.8.0 — fixed in 0.8.0

How to fix

Upgrade to a fixed version: GPAC 0.8.0. Check the vendor advisory for mitigations.

References

• https://github.com/gpac/gpac/commit/1ab4860609f2e7a35634930571e7d0531297e090
• https://github.com/gpac/gpac/issues/1268
• https://github.com/gpac/gpac/commit/1ab4860609f2e7a35634930571e7d0531297e090
• https://github.com/gpac/gpac/issues/1268

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