Junos OS 취약점 악용 탐지: 해커들이 POC 공개 후 Juniper 장치를 악용하여 CVE-2023-36844 원격 코드 실행 취약점을 통한 버그 체인 활용

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Veronika Telychko

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8월 31, 2023 · 3 분 읽기

Junos OS 취약점 악용 탐지: 해커들이 POC 공개 후 Juniper 장치를 악용하여 CVE-2023-36844 원격 코드 실행 취약점을 통한 버그 체인 활용

적대자들이 CVE-2023-36844, CVE-2023-36845, CVE-2023-36846, CVE-2023-3684로 추적되는 Junos OS의 J-Web 컴포넌트에서 새로 발견된 네 가지 RCE 보안 취약점을 무기화 하고 있습니다. 식별된 취약점은 함께 연결될 수 있어 공격자가 손상된 인스턴스에서 임의의 코드를 실행할 수 있습니다. Juniper JunOS 취약점을 연결하는 PoC 공격 코드의 공개 후, 사이버 방어자들은 관련된 공격 시도를 경각심 있게 인식하고 있습니다.

CVE-2023-36844 RCE 체인 공격 탐지

CVE-2023-36844 RCE 체인에 대한 개념증명(포크) 공격 코드가 웹에 공개되어 보안 전문가들은 잠재적 침입을 사전에 식별할 수 있는 맞춤형 탐지 콘텐츠가 필요합니다. SOC Prime 플랫폼은 내부 공격자가 가능할 RCE 체인 공격 시도를 탐지할 수 있는 관련 Sigma 규칙을 집계합니다.

가능한 CVE-2023-36844 (Juniper PHP 외부 변수 수정) RCE 체인 공격 시도 (프록시 통해)

이 규칙은 18개의 SIEM, EDR, XDR, 데이터 레이크 기술 형식과 호환되며 초기 접근전술을 다루는 MITRE ATT&CK 프레임워크에 연결되며, 대응 기법으로 공공 애플리케이션 익스플로잇(T1190)을 포함합니다.

기존 및 새로운 취약점에 대한 공격 시도를 탐지하는 Sigma 규칙의 전체 컬렉션을 탐험하려면 아래의 ‘탐지 탐색’ 버튼을 누르세요. 관련 탐지 알고리즘을 확보하고 CTI 및 MITRE ATT&CK 컨텍스트를 포함한 방대한 메타데이터를 탐색하십시오.

탐지 탐색

Juniper RCE 버그 체인 공격 분석

2023년 8월 19일, Juniper Networks는 RCE에 이르게 할 수 있는 Junos OS의 J-Web 컴포넌트에서 새로 발견된 네 가지 결함에 대해 방어자에게 경고하는 보안 공지를 발표했습니다. 탐지된 문제들은 Juniper EX 스위치 및 SRX 방화벽의 모든 버전에 영향을 미치며, 제공된 권장사항을 따른 뒤 사이버 방어자들의 즉각적인 주의가 필요합니다. 보안 공지.

모든 보안 버그는 중요하다고 간주되며, 누적 CVSS 점수는 9.8에 이르며 다음과 같이 그룹화될 수 있습니다:

CVE-2023-36844 및 CVE-2023-36845는 공격자가 중요한 환경 변수들을 제어할 수 있게 하는 PHP 외부 변수 수정 취약점입니다.
CVE-2023-36846 및 CVE-2023-36847은 성공적인 공격 시도시 파일 시스템의 무결성에 영향을 줄 수 있는 중요한 기능 결함에 대한 인증 누락입니다.

Juniper Networks는 이 버그 체인을 악용한 실제 필드 공격 증거가 없음을 주장했지만, 상황은 watchTowr Labs가 PoC 공격 코드를 공개한 지 불과 일주일 만에 반전되었습니다. 예를 들어, Shadowserver Foundation 팀은 CVE-2023-36844 및 기타 버그들을 무기화하고 위에서 언급한 PoC 공격 코드를 활용하는 일련의 IP에서의 공격 시도를 식별했습니다. 이러한 새로운 Juniper OS 결함을 연결하고 무기화하는 데 대한 더 많은 통찰력을 제공하기 위해 연구자들은 또한 기술 심층 분석 을 발표하여, 공격 과정에 대한 심층적인 기술 분석을 제공했습니다.

Shadowserver 팀의 연구에 따르면, 해커들은 이미 8,000개 이상의 Juniper 인스턴스를 공격했으며, 대부분의 대상은 한국에 위치해 있습니다.

잠재적 위협을 완화하기 위해 방어자들은 즉시 패치를 적용하거나 최신 JunOS 버전으로 업그레이드할 것을 권장합니다. 또한, J-Web 컴포넌트에 대한 인터넷 액세스를 즉시 비활성화하는 것은 공격 표면을 줄이는 데 도움이 될 수 있습니다.

집단 CTI에 의존하고 Uncoder AI 를 사용하여 일일 보안 운영에서 시간을 절약하면서 항상 변화하는 위협 환경의 맥박을 유지하여 동료 주도의 전문 지식을 기반으로 귀하의 연구를 쌓으세요.

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SOC Prime의 Detection as Code 플랫폼에 가입하세요 귀하의 비즈니스와 가장 관련 있는 위협에 대한 가시성을 향상시키세요. 시작하고 즉각적인 가치를 창출하기 위해 지금 SOC Prime 전문가와의 미팅을 예약하세요.

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Name	Descripiton
PHPSESSID	Preserves user session state across page requests. Cookie generated by applications based on the PHP language. This is a general purpose identifier used to maintain user session variables. It is normally a random generated number, how it is used can be specific to the site, but a good example is maintaining a logged-in status for a user between pages.
sp_i	Used to store information about authenticated User.
sp_r	Used to store information about authenticated User.
sp_a	Used to store information about authenticated User.

Name	Descripiton
tuuid	Collects anonymous data related to the user's visits to the website, such as the number of visits, average time spent on the website and what pages have been loaded.
tuuid_last_update	Collects anonymous data related to the user's visits to the website, such as the number of visits, average time spent on the website and what pages have been loaded.
um	Collects anonymous data related to the user's visits to the website, such as the number of visits, average time spent on the website and what pages have been loaded.
umeh	Collects anonymous data related to the user's visits to the website, such as the number of visits, average time spent on the website and what pages have been loaded.
na_sc_x	Used by the social sharing platform AddThis to keep a record of parts of the site that has been visited in order to recommend other parts of the site.
APID	Collects anonymous data related to the user's visits to the website.
IDSYNC	Collects anonymous data related to the user's visits to the website.
_cc_aud	Collects anonymous statistical data related to the user's website visits, such as the number of visits, average time spent on the website and what pages have been loaded. The purpose is to segment the website's users according to factors such as demographics and geographical location, in order to enable media and marketing agencies to structure and understand their target groups to enable customised online advertising.
_cc_cc	Collects anonymous statistical data related to the user's website visits, such as the number of visits, average time spent on the website and what pages have been loaded. The purpose is to segment the website's users according to factors such as demographics and geographical location, in order to enable media and marketing agencies to structure and understand their target groups to enable customised online advertising.
_cc_dc	Collects anonymous statistical data related to the user's website visits, such as the number of visits, average time spent on the website and what pages have been loaded. The purpose is to segment the website's users according to factors such as demographics and geographical location, in order to enable media and marketing agencies to structure and understand their target groups to enable customised online advertising.
_cc_id	Collects anonymous statistical data related to the user's website visits, such as the number of visits, average time spent on the website and what pages have been loaded. The purpose is to segment the website's users according to factors such as demographics and geographical location, in order to enable media and marketing agencies to structure and understand their target groups to enable customised online advertising.
dpm	Via a unique ID that is used for semantic content analysis, the user's navigation on the website is registered and linked to offline data from surveys and similar registrations to display targeted ads.
acs	Collects anonymous data related to the user's visits to the website, such as the number of visits, average time spent on the website and what pages have been loaded, with the purpose of displaying targeted ads.
clid	Collects anonymous data related to the user's visits to the website, such as the number of visits, average time spent on the website and what pages have been loaded, with the purpose of displaying targeted ads.
KRTBCOOKIE_#	Registers a unique ID that identifies the user's device during return visits across websites that use the same ad network. The ID is used to allow targeted ads.
PUBMDCID	Registers a unique ID that identifies the user's device during return visits across websites that use the same ad network. The ID is used to allow targeted ads.
PugT	Registers a unique ID that identifies the user's device during return visits across websites that use the same ad network. The ID is used to allow targeted ads.
ssi	Registers a unique ID that identifies a returning user's device. The ID is used for targeted ads.
_tmid	Registers a unique ID that identifies the user's device upon return visits. The ID is used to target ads in video clips.
wam-sync	Used by the advertising platform Weborama to determine the visitor's interests based on pages visits, content clicked and other actions on the website.
wui	Used by the advertising platform Weborama to determine the visitor's interests based on pages visits, content clicked and other actions on the website.
AFFICHE_W	Used by the advertising platform Weborama to determine the visitor's interests based on pages visits, content clicked and other actions on the website.
B	Collects anonymous data related to the user's website visits, such as the number of visits, average time spent on the website and what pages have been loaded. The registered data is used to categorise the users' interest and demographical profiles with the purpose of customising the website content depending on the visitor.
1P_JAR	These cookies are used to gather website statistics, and track conversion rates.
APISID	Google set a number of cookies on any page that includes a Google reCAPTCHA. While we have no control over the cookies set by Google, they appear to include a mixture of pieces of information to measure the number and behaviour of Google reCAPTCHA users.
HSID	Google set a number of cookies on any page that includes a Google reCAPTCHA. While we have no control over the cookies set by Google, they appear to include a mixture of pieces of information to measure the number and behaviour of Google reCAPTCHA users.
NID	Google set a number of cookies on any page that includes a Google reCAPTCHA. While we have no control over the cookies set by Google, they appear to include a mixture of pieces of information to measure the number and behaviour of Google reCAPTCHA users.
SAPISID	Google set a number of cookies on any page that includes a Google reCAPTCHA. While we have no control over the cookies set by Google, they appear to include a mixture of pieces of information to measure the number and behaviour of Google reCAPTCHA users.
SID	Google set a number of cookies on any page that includes a Google reCAPTCHA. While we have no control over the cookies set by Google, they appear to include a mixture of pieces of information to measure the number and behaviour of Google reCAPTCHA users.
SIDCC	Security cookie to protect users data from unauthorised access.
SSID	Google set a number of cookies on any page that includes a Google reCAPTCHA. While we have no control over the cookies set by Google, they appear to include a mixture of pieces of information to measure the number and behaviour of Google reCAPTCHA users.
__utmx	This cookie is associated with Google Website Optimizer, a tool designed to help site owners improve their wbesites. It is used to distinguish between two varaitions a webpage that might be shown to a visitor as part of an A/B split test. This helps site owners to detemine which version of a page performs better, and therefore helps to improve the website.
__utmxx	This cookie is associated with Google Website Optimizer, a tool designed to help site owners improve their wbesites. It is used to distinguish between two varaitions a webpage that might be shown to a visitor as part of an A/B split test. This helps site owners to detemine which version of a page performs better, and therefore helps to improve the website.

Name	Descripiton
_hjid	Hotjar cookie. This cookie is set when the customer first lands on a page with the Hotjar script. It is used to persist the random user ID, unique to that site on the browser. This ensures that behavior in subsequent visits to the same site will be attributed to the same user ID.
_hjIncludedInSample	This cookie is associated with web analytics functionality and services from Hot Jar, a Malta based company. It uniquely identifies a visitor during a single browser session and indicates they are included in an audience sample.
intercom-id-[xxx]	This cookie is used by Intercom as a session so that users can continue a chat as they move through the site.
intercom-session-[xxx]	Used to keeping track of sessions and remember logins and conversations.
demdex	Via a unique ID that is used for semantic content analysis, the user's navigation on the website is registered and linked to offline data from surveys and similar registrations to display targeted ads.
CookieConsent	Stores the user's cookie consent state for the current domain.
__cfduid	Used by the content network, Cloudflare, to identify trusted web traffic.
ss	These cookies enable the website to provide enhanced functionality and personalisation . They may be set by us or by third party providers whose services we have added to our pages. These services may include the Live Chat facility, Contact Us form(s), the Product Quotation forms and submission process, and the Email Newsletter sign up functionality .

Name	Descripiton
_ga	This cookie name is asssociated with Google Universal Analytics - which is a significant update to Google's more commonly used analytics service. This cookie is used to distinguish unique users by assigning a randomly generated number as a client identifier. It is included in each page. Registers a unique ID that is used to generate statistical data on how the visitor uses the website. request in a site and used to calculate visitor, session and campaign data for the sites analytics reports. By default it is set to expire after 2 years, although this is customisable by website owners.
_gat	Used by Google Analytics to throttle request rate. This cookie name is associated with Google Universal Analytics, according to documentation it is used to throttle the request rate - limiting the collection of data on high traffic sites. It expires after 10 minutes.
_gid	This cookie name is asssociated with Google Universal Analytics. This appears to be a new cookie and as of Spring 2017 no information is available from Google. It appears to store and update a unique value for each page visited. Registers a unique ID that is used to generate statistical data on how the visitor uses the website.
IDE	Used by Google DoubleClick to register and report the website user's actions after viewing or clicking one of the advertiser's ads with the purpose of measuring the efficacy of an ad and to present targeted ads to the user.
r/collect	Used by Google DoubleClick to register and report the website user's actions after viewing or clicking one of the advertiser's ads with the purpose of measuring the efficacy of an ad and to present targeted ads to the user.
test_cookie	Used to check if the user's browser supports cookies.
collect	Used to send data to Google Analytics about the visitor's device and behaviour. Tracks the visitor across devices and marketing channels.
ads/user-lists/#	These cookies may be set through our site by our advertising partners. They may be used by those companies to build a profile of your interests and show you relevant adverts on other sites.
c	Registers anonymised user data, such as IP address, geographical location, visited websites, and what ads the user has clicked, with the purpose of optimising ad display based on the user's movement on websites that use the same ad network.
khaos	Registers anonymised user data, such as IP address, geographical location, visited websites, and what ads the user has clicked, with the purpose of optimising ad display based on the user's movement on websites that use the same ad network.
put_#	Registers anonymised user data, such as IP address, geographical location, visited websites, and what ads the user has clicked, with the purpose of optimising ad display based on the user's movement on websites that use the same ad network.
rpb	Registers anonymised user data, such as IP address, geographical location, visited websites, and what ads the user has clicked, with the purpose of optimising ad display based on the user's movement on websites that use the same ad network.
rpx	Registers anonymised user data, such as IP address, geographical location, visited websites, and what ads the user has clicked, with the purpose of optimising ad display based on the user's movement on websites that use the same ad network.
tap.php	Registers anonymised user data, such as IP address, geographical location, visited websites, and what ads the user has clicked, with the purpose of optimising ad display based on the user's movement on websites that use the same ad network.

Junos OS 취약점 악용 탐지: 해커들이 POC 공개 후 Juniper 장치를 악용하여 CVE-2023-36844 원격 코드 실행 취약점을 통한 버그 체인 활용

CVE-2023-36844 RCE 체인 공격 탐지

Juniper RCE 버그 체인 공격 분석

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Junos OS 취약점 악용 탐지: 해커들이 POC 공개 후 Juniper 장치를 악용하여 CVE-2023-36844 원격 코드 실행 취약점을 통한 버그 체인 활용

CVE-2023-36844 RCE 체인 공격 탐지

Juniper RCE 버그 체인 공격 분석

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