CRITICAL✓ PATCH🇵🇱 Wersja polska

CVE-2020-3284

CVSS 9.8v3.1pub. 2020-11-06upd. 2024-11-21

A vulnerability in the enhanced Preboot eXecution Environment (PXE) boot loader for Cisco IOS XR 64-bit Software could allow an unauthenticated, remote attacker to execute unsigned code during the PXE boot process on an affected device. The PXE boot loader is part of the BIOS and runs over the management interface of hardware platforms that are running Cisco IOS XR Software only. The vulnerability exists because internal commands that are issued when the PXE network boot process is loading a software image are not properly verified. An attacker could exploit this vulnerability by compromising the PXE boot server and replacing a valid software image with a malicious one. Alternatively, the attacker could impersonate the PXE boot server and send a PXE boot reply with a malicious file. A successful exploit could allow the attacker to execute unsigned code on the affected device. Note: To fix this vulnerability, both the Cisco IOS XR Software and the BIOS must be upgraded. The BIOS code is included in Cisco IOS XR Software but might require additional installation steps. For further information, see the Fixed Software section of this advisory.

CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

  • Cisco A99 Rp2 Se

    HW
    Cisco
    all versions

  • Cisco A99 Rp2 Se Firmware

    OS
    Cisco
    < 14.35

  • Cisco A99 Rp2 Tr

    HW
    Cisco
    all versions

  • Cisco A99 Rp2 Tr Firmware

    OS
    Cisco
    < 14.35

  • Cisco A99 Rp3 Se

    HW
    Cisco
    all versions

  • Cisco A99 Rp3 Se Firmware

    OS
    Cisco
    < 30.23

  • Cisco A99 Rp3 Tr

    HW
    Cisco
    all versions

  • Cisco A99 Rp3 Tr Firmware

    OS
    Cisco
    < 30.23

  • Cisco A99 Rsp Se

    HW
    Cisco
    all versions

  • Cisco A99 Rsp Se Firmware

    OS
    Cisco
    < 16.14

  • Cisco A99 Rsp Tr

    HW
    Cisco
    all versions

  • Cisco A99 Rsp Tr Firmware

    OS
    Cisco
    < 16.14

  • Cisco A9k Rsp5 Se

    HW
    Cisco
    all versions

  • Cisco A9k Rsp5 Se Firmware

    OS
    Cisco
    < 31.20

  • Cisco A9k Rsp5 Tr

    HW
    Cisco
    all versions

  • Cisco A9k Rsp5 Tr Firmware

    OS
    Cisco
    < 31.20

  • Cisco A9k Rsp880 Lt Se

    HW
    Cisco
    all versions

  • Cisco A9k Rsp880 Lt Se Firmware

    OS
    Cisco
    < 17.34

  • Cisco A9k Rsp880 Lt Tr

    HW
    Cisco
    all versions

  • Cisco A9k Rsp880 Lt Tr Firmware

    OS
    Cisco
    < 17.34

  • Cisco A9k Rsp880 Se

    HW
    Cisco
    all versions

  • Cisco A9k Rsp880 Se Firmware

    OS
    Cisco
    < 10.65

  • Cisco A9k Rsp880 Tr

    HW
    Cisco
    all versions

  • Cisco A9k Rsp880 Tr Firmware

    OS
    Cisco
    < 10.65

  • Cisco Asr 9901 Rp

    HW
    Cisco
    all versions

  • Cisco Asr 9901 Rp Firmware

    OS
    Cisco
    < 22.20

  • Cisco IOS XR

    OS
    Cisco
    < 6.5.2< 1.12< 1.21< 6.6.25< 7.2.17.0.0 – 7.0.2 (excl.)

  • Cisco N540 12z20g Sys A\/d

    HW
    Cisco
    all versions

  • Cisco N540 12z20g Sys A\/d Firmware

    OS
    Cisco
    < 1.15

  • Cisco N540 24z8q2c M

    HW
    Cisco
    all versions
🟢
PATCH AVAILABLE
Vendor update available. Deploy in standard maintenance cycle.
CWE
References

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