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    CVE-2019-5892

    bgpd in FRRouting FRR (aka Free Range Routing) 2.x and 3.x before 3.0.4, 4.x before 4.0.1, 5.x before 5.0.2, and 6.x before 6.0.2 (not affecting Cumulus Linux or VyOS), when ENABLE_BGP_VNC is used for Virtual Network Control, allows remote attackers to cause a denial of service (peering session flap) via attribute 255 in a BGP UPDATE packet. This occurred during Disco in January 2019 because FRR does not implement RFC 7606, and therefore the packets with 255 were considered invalid VNC data and the BGP session was closed.

    Published:Jan 10, 2019
    Last Modified:Nov 21, 2024
    EPS:Jan 10, 2019
    EPSS Score:0.03807
    CVSS Score:6.5

    Affected Products

    Vendor
    Frrouting
    Product
    Frrouting

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-436 Interpretation Conflict

    Related CVEs

    CVE-2026-37460 (CVSS 7.5) — Missing input validation in the rfapiRibBi2Ri() function (rfapi_rib.c) of FRRouting (FRR) stable/10.0 to stabl…
    CVE-2026-37459 (CVSS 7.5) — An integer underflow in FRRouting (FRR) stable/10.0 to stable/10.6 allows attackers to cause a Denial of Servi…
    CVE-2026-37458 (CVSS 6.5) — Missing input validation in the MP_REACH_NLRI component of FRRouting (FRR) stable/10.0 to stable/10.6 allows a…
    CVE-2026-37457 (CVSS 7.5) — An off-by-one out-of-bounds write vulnerability in the bgp_flowspec_op_decode() function (bgpd/bgp_flowspec_ut…
    CVE-2026-28532 (CVSS 6) — FRRouting before 10.5.3 contains an integer overflow vulnerability in seven OSPF Traffic Engineering and Segme…
    CVE-2026-5107 (CVSS 2.3) — A vulnerability has been found in FRRouting FRR up to 10.5.1. This affects the function process_type2_route of…
    CVE-2025-61103 (CVSS 7.5) — FRRouting/frr from v4.0 through v10.4.1 was discovered to contain a NULL pointer dereference via the show_vty_…
    CVE-2025-61106 (CVSS 7.5) — FRRouting/frr from v4.0 through v10.4.1 was discovered to contain a NULL pointer dereference via the show_vty_…
    CVE-2025-61104 (CVSS 7.5) — FRRouting/frr from v4.0 through v10.4.1 was discovered to contain a NULL pointer dereference via the show_vty_…
    CVE-2025-61107 (CVSS 7.5) — FRRouting/frr from v4.0 through v10.4.1 was discovered to contain a NULL pointer dereference via the show_vty_…

    References

    https://frrouting.org/community/security/cve-2019-5892.html
    https://github.com/FRRouting/frr/commit/943d595a018e69b550db08cccba1d0778a86705a
    https://github.com/FRRouting/frr/releases/tag/frr-3.0.4
    https://github.com/FRRouting/frr/releases/tag/frr-4.0.1
    https://github.com/FRRouting/frr/releases/tag/frr-5.0.2
    https://github.com/FRRouting/frr/releases/tag/frr-6.0.2
    https://lists.frrouting.org/pipermail/frog/2019-January/000404.html
    https://frrouting.org/community/security/cve-2019-5892.html
    https://github.com/FRRouting/frr/commit/943d595a018e69b550db08cccba1d0778a86705a
    https://github.com/FRRouting/frr/releases/tag/frr-3.0.4
    https://github.com/FRRouting/frr/releases/tag/frr-4.0.1
    https://github.com/FRRouting/frr/releases/tag/frr-5.0.2
    https://github.com/FRRouting/frr/releases/tag/frr-6.0.2
    https://lists.frrouting.org/pipermail/frog/2019-January/000404.html

    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