긴급도 100/100 심각도 7.2 · 높음 악용확률 99.8% CISA KEV · 2023-10-23 CWE-78

CVE-2023-20273

CISA 기관 조치 기한: 2023-10-27

Cisco Cisco IOS XE Web UI

Qualys 위협 인텔 · 심각도 5/5 · QID 317376 · Cisco

공개 익스플로잇 실제 공격 관측 측면이동 쉬운 악용 대량 데이터 유출 서비스 거부 악성코드 연계 웜 전파 권한상승 인증 불필요 원격코드실행 랜섬웨어 연계 CISA KEV

CVSS Temporal 9.5 (현재 위협 반영)
익스플로잇 성숙도: 광범위 (4/4)
공격 위치: 원격
패치: 가능
익스플로잇 프레임워크: Metasploit, GitHub
연계 악성코드: Black Basta (Ransomware)
PCI-DSS 관련

Cisco IOS XE contains a command injection vulnerability in the web user interface. When chained with CVE-2023-20198, the attacker can leverage the new local user to elevate privilege to root and write the implant to the file system. Cisco identified CVE-2023-20273 as the vulnerability exploited to deploy the implant. CVE-2021-1435, previously associated with the exploitation events, is no longer believed to be related to this activity.

KEV 필수 조치: Verify that instances of Cisco IOS XE Web UI are in compliance with BOD 23-02 and apply mitigations per vendor instructions. For affected products (Cisco IOS XE Web UI exposed to the internet or to untrusted networks), follow vendor instructions to determine if a system may have been compromised and immediately report positive findings to CISA.

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

NVD 상세 ↗ GitHub Advisory ↗ 참고 링크 ↗