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    CVE-2021-45955

    Dnsmasq 2.86 has a heap-based buffer overflow in resize_packet (called from FuzzResizePacket and fuzz_rfc1035.c) because of the lack of a proper bounds check upon pseudo header re-insertion. NOTE: the vendor's position is that CVE-2021-45951 through CVE-2021-45957 "do not represent real vulnerabilities, to the best of our knowledge." However, a contributor states that a security patch (mentioned in 016162.html) is needed

    Published:Dec 31, 2021
    Last Modified:Nov 21, 2024
    EPS:Dec 31, 2021
    EPSS Score:0.00046
    CVSS Score:9.8

    Affected Products

    Vendor
    Thekelleys
    Product
    Dnsmasq

    Exploits

    https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=35898https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=35898

    Common Weakness Enumeration

    CWE-787 Out-of-bounds Write

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2023-49441 (CVSS 7.5) — dnsmasq 2.9 is vulnerable to Integer Overflow via forward_query.…
    CVE-2023-50387 (CVSS 7.5) — Certain DNSSEC aspects of the DNS protocol (in RFC 4033, 4034, 4035, 6840, and related RFCs) allow remote atta…
    CVE-2023-28450 (CVSS 7.5) — An issue was discovered in Dnsmasq before 2.90. The default maximum EDNS.0 UDP packet size was set to 4096 but…
    CVE-2022-0934 (CVSS 7.5) — A single-byte, non-arbitrary write/use-after-free flaw was found in dnsmasq. This flaw allows an attacker who …
    CVE-2021-45951 (CVSS 9.8) — Dnsmasq 2.86 has a heap-based buffer overflow in check_bad_address (called from check_for_bogus_wildcard and F…
    CVE-2021-45952 (CVSS 9.8) — Dnsmasq 2.86 has a heap-based buffer overflow in dhcp_reply (called from dhcp_packet and FuzzDhcp). NOTE: the …
    CVE-2021-45954 (CVSS 9.8) — Dnsmasq 2.86 has a heap-based buffer overflow in extract_name (called from answer_auth and FuzzAuth). NOTE: th…
    CVE-2021-45956 (CVSS 9.8) — Dnsmasq 2.86 has a heap-based buffer overflow in print_mac (called from log_packet and dhcp_reply). NOTE: the …
    CVE-2021-45957 (CVSS 9.8) — Dnsmasq 2.86 has a heap-based buffer overflow in answer_request (called from FuzzAnswerTheRequest and fuzz_rfc…
    CVE-2021-45953 (CVSS 9.8) — Dnsmasq 2.86 has a heap-based buffer overflow in extract_name (called from hash_questions and fuzz_util.c). NO…

    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