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    CVE-2020-18776

    In Libav 12.3, there is a segmentation fault in vc1_decode_b_mb_intfr in vc1_block.c that allows an attacker to cause denial-of-service via a crafted file.

    Published:Aug 23, 2021
    Last Modified:Nov 21, 2024
    EPS:Aug 23, 2021
    EPSS Score:0.00238
    CVSS Score:6.5

    Affected Products

    Vendor
    Libav
    Product
    Libav

    Exploits

    https://bugzilla.libav.org/show_bug.cgi?id=1153https://bugzilla.libav.org/show_bug.cgi?id=1153

    Common Weakness Enumeration

    CWE-125 Out-of-bounds Read

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-540 Overread Buffers

    Related CVEs

    CVE-2025-8586 (CVSS 1.9) — A vulnerability, which was classified as problematic, was found in libav up to 12.3. This affects the function…
    CVE-2025-8585 (CVSS 1.9) — A vulnerability, which was classified as critical, has been found in libav up to 12.3. Affected by this issue …
    CVE-2025-8584 (CVSS 1.9) — A vulnerability classified as problematic was found in libav up to 12.3. Affected by this vulnerability is the…
    CVE-2020-18778 (CVSS 6.5) — In Libav 12.3, there is a heap-based buffer over-read in vc1_decode_p_mb_intfi in vc1_block.c that allows an a…
    CVE-2020-18775 (CVSS 6.5) — In Libav 12.3, there is a heap-based buffer over-read in vc1_decode_b_mb_intfi in vc1_block.c that allows an a…
    CVE-2014-4609 (CVSS 8.8) — Integer overflow in the get_len function in libavutil/lzo.c in Libav before 0.8.13, 9.x before 9.14, and 10.x …
    CVE-2019-9720 (CVSS 6.5) — A stack-based buffer overflow in the subtitle decoder in Libav 12.3 allows attackers to corrupt the stack via …
    CVE-2019-9719 (CVSS 8.8) — A stack-based buffer overflow in the subtitle decoder in Libav 12.3 allows attackers to corrupt the stack via …
    CVE-2019-9717 (CVSS 6.5) — In Libav 12.3, a denial of service in the subtitle decoder allows attackers to hog the CPU via a crafted video…
    CVE-2019-14443 (CVSS 6.5) — An issue was discovered in Libav 12.3. Division by zero in range_decode_culshift in libavcodec/apedec.c allows…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High