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CVE-2021-31886CRITICAL· 9.8MITRENVD대응게시일: 2021. 11. 09.수정일: 2024. 11. 21.CNA: productcert@siemens.comModified

A vulnerability has been identified in APOGEE MBC (PPC) (BACnet) (All versions), APOGEE MBC (PPC) (P2 Ethernet) (All versions), APOGEE MEC (

Memory-Corruption

위협 신호 · CVSS · EPSS · KEV

시급 검토· 이론 심각도 Critical
CVSS
9.8critical

이론적 심각도 점수

EPSS
3.0%상위 13.2%

30일 내 악용 확률 예측

KEV
미등재

실측 악용 기록 없음

권장 대응 기한3일 이내CISA SSVC 기준

즉시(3일 이내) 패치 — 최우선 대응

자동화 가능완전 장악외부 노출· KEV 미등재 · 자동화 가능 · 완전 장악 · 외부 노출

CVSS 벡터 · 메트릭

악용 경로
공격 벡터네트워크
공격 복잡도낮음
필요 권한불필요
사용자 상호작용불필요
범위불변
영향
기밀성 영향높음
무결성 영향높음
가용성 영향높음
버전별 점수
CVSS 3.19.8CRITICAL· 악용성 3.9· 영향도 5.9
CVSS 2.07.5HIGH· 악용성 10· 영향도 6.4
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

약점 (CWE)

  • CWE-170
  • CWE-787

    경계 밖 쓰기 — 버퍼 범위를 벗어난 메모리에 써서 충돌·코드 실행으로 이어질 수 있음.

상세 설명

A vulnerability has been identified in APOGEE MBC (PPC) (BACnet) (All versions), APOGEE MBC (PPC) (P2 Ethernet) (All versions), APOGEE MEC (PPC) (BACnet) (All versions), APOGEE MEC (PPC) (P2 Ethernet) (All versions), APOGEE PXC Compact (BACnet) (All versions < V3.5.4), APOGEE PXC Compact (P2 Ethernet) (All versions < V2.8.19), APOGEE PXC Modular (BACnet) (All versions < V3.5.4), APOGEE PXC Modular (P2 Ethernet) (All versions < V2.8.19), Desigo PXC00-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC00-U (All versions >= V2.3 and < V6.30.016), Desigo PXC001-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC100-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC12-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC128-U (All versions >= V2.3 and < V6.30.016), Desigo PXC200-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC22-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC22.1-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC36.1-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC50-E.D (All versions >= V2.3 and < V6.30.016), Desigo PXC64-U (All versions >= V2.3 and < V6.30.016), Desigo PXM20-E (All versions >= V2.3 and < V6.30.016), Nucleus NET (All versions), Nucleus ReadyStart V3 (All versions < V2017.02.4), Nucleus Source Code (All versions), TALON TC Compact (BACnet) (All versions < V3.5.4), TALON TC Modular (BACnet) (All versions < V3.5.4). FTP server does not properly validate the length of the “USER” command, leading to stack-based buffer overflows. This may result in Denial-of-Service conditions and Remote Code Execution. (FSMD-2021-0010)

AI 심층 분석

공격 시나리오 · 재현 가능한 PoC 페이로드 · 즉시 적용 가능한 차단 패치를 한 번에 받아 보세요. 보안 운영팀이 그대로 점검·티켓팅에 쓸 수 있는 형태로 정리해 드립니다.

영향받는 제품·버전

  • siemens desigo_pxc12-e.d
    other
  • siemens nucleus_net
    other
  • siemens nucleus_readystart_v3< 2017.02.4
    other
  • siemens nucleus_source_code
    other
  • siemens apogee_modular_building_controller_firmware
    other
  • siemens apogee_modular_building_controller
    other
  • siemens apogee_modular_equiment_controller_firmware
    other
  • siemens apogee_modular_equiment_controller
    other
  • siemens apogee_pxc_compact_firmware< 2.8.19
    other
  • siemens apogee_pxc_compact_firmware< 3.5.4
    other
  • siemens apogee_pxc_compact
    other
  • siemens apogee_pxc_modular_firmware< 2.8.19
    other
  • siemens apogee_pxc_modular_firmware< 3.5.4
    other
  • siemens apogee_pxc_modular
    other
  • siemens talon_tc_compact_firmware< 3.5.4
    other
  • siemens talon_tc_compact
    other
  • siemens talon_tc_modular_firmware< 3.5.4
    other
  • siemens talon_tc_modular
    other
  • siemens desigo_pxc00-e.d_firmware2.3 - 6.30.016
    other
  • siemens desigo_pxc00-e.d
    other
  • siemens desigo_pxc00-u_firmware2.3 - 6.30.016
    other
  • siemens desigo_pxc00-u
    other
  • siemens desigo_pxc001-e.d_firmware2.3 - 6.30.016
    other
  • siemens desigo_pxc001-e.d
    other
  • siemens desigo_pxc12-e.d_firmware2.3 - 6.30.016
    other
  • siemens desigo_pxc22-e.d_firmware2.3 - 6.30.016
    other
  • siemens desigo_pxc22-e.d
    other
  • siemens desigo_pxc22.1-e.d_firmware2.3 - 6.30.016
    other
  • siemens desigo_pxc22.1-e.d
    other
  • siemens desigo_pxc36.1-e.d_firmware2.3 - 6.30.016
    other
  • siemens desigo_pxc36.1-e.d
    other
  • siemens desigo_pxc50-e.d_firmware2.3 - 6.30.016
    other
  • siemens desigo_pxc50-e.d
    other
  • siemens desigo_pxc64-u_firmware2.3 - 6.30.016
    other
  • siemens desigo_pxc64-u
    other
  • siemens desigo_pxc100-e.d_firmware2.3 - 6.30.016
    other
  • siemens desigo_pxc100-e.d
    other
  • siemens desigo_pxc128-u_firmware2.3 - 6.30.016
    other
  • siemens desigo_pxc128-u
    other
  • siemens desigo_pxc200-e.d_firmware2.3 - 6.30.016
    other
  • siemens desigo_pxc200-e.d
    other
  • siemens desigo_pxm20-e_firmware2.3 - 6.30.016
    other
  • siemens desigo_pxm20-e
    other

영향받는 구성 (CPE) 43

  • siemens nucleus_netcpe:2.3:a:siemens:nucleus_net:*:*:*:*:*:*:*:*
  • siemens nucleus_readystart_v3< 2017.02.4cpe:2.3:a:siemens:nucleus_readystart_v3:*:*:*:*:*:*:*:*
  • siemens nucleus_source_codecpe:2.3:a:siemens:nucleus_source_code:*:*:*:*:*:*:*:*
  • siemens apogee_modular_building_controller_firmwarecpe:2.3:o:siemens:apogee_modular_building_controller_firmware:*:*:*:*:*:*:*:*
  • siemens apogee_modular_building_controllercpe:2.3:h:siemens:apogee_modular_building_controller:-:*:*:*:*:*:*:*
  • siemens apogee_modular_equiment_controller_firmwarecpe:2.3:o:siemens:apogee_modular_equiment_controller_firmware:*:*:*:*:*:*:*:*
  • siemens apogee_modular_equiment_controllercpe:2.3:h:siemens:apogee_modular_equiment_controller:-:*:*:*:*:*:*:*
  • siemens apogee_pxc_compact_firmware< 2.8.19cpe:2.3:o:siemens:apogee_pxc_compact_firmware:*:*:*:*:p2_ethernet:*:*:*
  • siemens apogee_pxc_compact_firmware< 3.5.4cpe:2.3:o:siemens:apogee_pxc_compact_firmware:*:*:*:*:bacnet:*:*:*
  • siemens apogee_pxc_compactcpe:2.3:h:siemens:apogee_pxc_compact:-:*:*:*:*:*:*:*
  • siemens apogee_pxc_modular_firmware< 2.8.19cpe:2.3:o:siemens:apogee_pxc_modular_firmware:*:*:*:*:p2_ethernet:*:*:*
  • siemens apogee_pxc_modular_firmware< 3.5.4cpe:2.3:o:siemens:apogee_pxc_modular_firmware:*:*:*:*:bacnet:*:*:*
  • siemens apogee_pxc_modularcpe:2.3:h:siemens:apogee_pxc_modular:-:*:*:*:*:*:*:*
  • siemens talon_tc_compact_firmware< 3.5.4cpe:2.3:o:siemens:talon_tc_compact_firmware:*:*:*:*:*:*:*:*
  • siemens talon_tc_compactcpe:2.3:h:siemens:talon_tc_compact:-:*:*:*:*:*:*:*
  • siemens talon_tc_modular_firmware< 3.5.4cpe:2.3:o:siemens:talon_tc_modular_firmware:*:*:*:*:*:*:*:*
  • siemens talon_tc_modularcpe:2.3:h:siemens:talon_tc_modular:-:*:*:*:*:*:*:*
  • siemens desigo_pxc00-e.d_firmware≥ 2.3 < 6.30.016cpe:2.3:o:siemens:desigo_pxc00-e.d_firmware:*:*:*:*:*:*:*:*
  • siemens desigo_pxc00-e.dcpe:2.3:h:siemens:desigo_pxc00-e.d:-:*:*:*:*:*:*:*
  • siemens desigo_pxc00-u_firmware≥ 2.3 < 6.30.016cpe:2.3:o:siemens:desigo_pxc00-u_firmware:*:*:*:*:*:*:*:*
  • siemens desigo_pxc00-ucpe:2.3:h:siemens:desigo_pxc00-u:-:*:*:*:*:*:*:*
  • siemens desigo_pxc001-e.d_firmware≥ 2.3 < 6.30.016cpe:2.3:o:siemens:desigo_pxc001-e.d_firmware:*:*:*:*:*:*:*:*
  • siemens desigo_pxc001-e.dcpe:2.3:h:siemens:desigo_pxc001-e.d:-:*:*:*:*:*:*:*
  • siemens desigo_pxc12-e.d_firmware≥ 2.3 < 6.30.016cpe:2.3:o:siemens:desigo_pxc12-e.d_firmware:*:*:*:*:*:*:*:*
  • siemens desigo_pxc12-e.dcpe:2.3:h:siemens:desigo_pxc12-e.d:-:*:*:*:*:*:*:*
  • siemens desigo_pxc22-e.d_firmware≥ 2.3 < 6.30.016cpe:2.3:o:siemens:desigo_pxc22-e.d_firmware:*:*:*:*:*:*:*:*
  • siemens desigo_pxc22-e.dcpe:2.3:h:siemens:desigo_pxc22-e.d:-:*:*:*:*:*:*:*
  • siemens desigo_pxc22.1-e.d_firmware≥ 2.3 < 6.30.016cpe:2.3:o:siemens:desigo_pxc22.1-e.d_firmware:*:*:*:*:*:*:*:*
  • siemens desigo_pxc22.1-e.dcpe:2.3:h:siemens:desigo_pxc22.1-e.d:-:*:*:*:*:*:*:*
  • siemens desigo_pxc36.1-e.d_firmware≥ 2.3 < 6.30.016cpe:2.3:o:siemens:desigo_pxc36.1-e.d_firmware:*:*:*:*:*:*:*:*
  • siemens desigo_pxc36.1-e.dcpe:2.3:h:siemens:desigo_pxc36.1-e.d:-:*:*:*:*:*:*:*
  • siemens desigo_pxc50-e.d_firmware≥ 2.3 < 6.30.016cpe:2.3:o:siemens:desigo_pxc50-e.d_firmware:*:*:*:*:*:*:*:*
  • siemens desigo_pxc50-e.dcpe:2.3:h:siemens:desigo_pxc50-e.d:-:*:*:*:*:*:*:*
  • siemens desigo_pxc64-u_firmware≥ 2.3 < 6.30.016cpe:2.3:o:siemens:desigo_pxc64-u_firmware:*:*:*:*:*:*:*:*
  • siemens desigo_pxc64-ucpe:2.3:h:siemens:desigo_pxc64-u:-:*:*:*:*:*:*:*
  • siemens desigo_pxc100-e.d_firmware≥ 2.3 < 6.30.016cpe:2.3:o:siemens:desigo_pxc100-e.d_firmware:*:*:*:*:*:*:*:*
  • siemens desigo_pxc100-e.dcpe:2.3:h:siemens:desigo_pxc100-e.d:-:*:*:*:*:*:*:*
  • siemens desigo_pxc128-u_firmware≥ 2.3 < 6.30.016cpe:2.3:o:siemens:desigo_pxc128-u_firmware:*:*:*:*:*:*:*:*
  • siemens desigo_pxc128-ucpe:2.3:h:siemens:desigo_pxc128-u:-:*:*:*:*:*:*:*
  • siemens desigo_pxc200-e.d_firmware≥ 2.3 < 6.30.016cpe:2.3:o:siemens:desigo_pxc200-e.d_firmware:*:*:*:*:*:*:*:*
  • siemens desigo_pxc200-e.dcpe:2.3:h:siemens:desigo_pxc200-e.d:-:*:*:*:*:*:*:*
  • siemens desigo_pxm20-e_firmware≥ 2.3 < 6.30.016cpe:2.3:o:siemens:desigo_pxm20-e_firmware:*:*:*:*:*:*:*:*
  • siemens desigo_pxm20-ecpe:2.3:h:siemens:desigo_pxm20-e:-:*:*:*:*:*:*:*

참고 자료 2

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