CVE-2023-3519 탐지: Citrix NetScaler ADC 및 NetScaler Gateway에서 원격 코드 실행 제로데이 공격이 활발히 악용됨

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Daryna Olyniychuk

마케팅 팀 리드

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8월 18, 2023 · 2 분 읽기

CVE-2023-3519 탐지: Citrix NetScaler ADC 및 NetScaler Gateway에서 원격 코드 실행 제로데이 공격이 활발히 악용됨

주의하세요! 사이버 보안 전문가들은 Citrix NetScaler 응용 프로그램 전송 컨트롤러(ADC)와 NetScaler Gateway 장치를 손상시키는 제로데이 결함을 방어자들에게 알립니다. CVE-2023-3519로 추적된 이 결함은 RCE로 이어질 수 있으며 GitHub에 공개된 PoC 익스플로잇과 함께 야생에서 적들이 적극적으로 활용하는 것으로 관찰됩니다.

CVE-2023-3519 익스플로잇 시도 탐지

CVE-2023-3519을 무기화한 공격의 증가로 인해 자동화된 방식으로 침입을 진행하는 것은 사이버 방어자들에게 점점 더 큰 위협이 되고 있습니다. 침입 가능성을 조기에 식별하기 위해, 집합적 사이버 방어를 위한 SOC Prime 플랫폼은 CVE-2023-3519 익스플로잇 탐지를 위한 심플한 Sigma 규칙 세트를 제공합니다.

모든 규칙은 28개 SIEM, EDR, XDR 및 데이터 레이크 기술과 호환되며 MITRE ATT&CK v12 에 매핑되어 위협 헌팅 작업을 간소화하고 중요한 위협에 대한 심층 분석을 매끄럽게 진행할 수 있게 합니다.

주목받고 있는 보안 문제를 다루는 규칙의 전체 목록을 탐색하려면 아래의 탐지 탐색 버튼을 클릭하세요. 보안 전문가는 ATT&CK 참조 및 CTI 링크와 함께 제공되는 광범위한 사이버 위협 컨텍스트에 도달할 수 있으며, 현재의 보안 요구에 맞추고 위협 조사를 강화할 수 있는 더 적절한 메타데이터를 얻을 수 있습니다.

탐지 탐색

CVE-2023-3519 분석

점점 증가하는 공격 시도에 대응하여 CVE-2023-3519 RCE, CVSS 점수가 9.8에 도달한 상태에서, Mandiant 연구원은 최근 IOC 스캔 도구 를 발표하여 방어자들이 Citrix 장치의 침해 흔적을 확인할 수 있도록 했습니다.

이 결함은 2023년 7월 중순에 주목받기 시작했고, 야생에서의 활발한 익스플로잇 주장과 함께 사이버 위협 시장에서 큰 반향을 일으켰습니다. 이 취약점은 공격자들이 NetScaler ADC(과거 Citrix ADC로 불림)와 NetScaler Gateway 장치에서 RCE를 수행할 수 있게 합니다. 공격자들은 악성 웹 셸과 스크립트를 업로드하여 CVE-2023-3519 결함을 무기화할 수 있으며, 이를 통해 환경을 검색하고 민감 데이터를 탈취할 수 있습니다. 현재 GitHub에 CVE-2023-3519에 대한 PoC 익스플로잇 은 관련 주소와 셸코드를 적용하여 사용할 수 있습니다.

사이버 보안 인식을 높이기 위해, Citrix는 즉시 관련 보안 알림을 발행하여, CVE-2023-3519 및 CVE-2023-3466, CVE-2023-3467과 같은 NetScaler 사용자에게 영향을 미치는 다른 결함의 잠재적 익스플로잇 시도에 대해 방어자들에게 신속하게 경고하려고 했습니다. 해당 보안 공지에서 NetScaler 고객은 취약성을 해결하는 최신 소프트웨어 버전으로 잠재적으로 손상된 인스턴스를 업그레이드하도록 권장되었습니다. 하지만, Shadowserver Foundation 의 사이버 보안 연구원들은 Citrix가 업데이트를 릴리스한 후에도 15,000개 이상의 장치가 관련 야생 공격을 악용하여 보안 버그에 노출되었다고 밝혔습니다.

수천 개의 Citrix NetScaler 인스턴스가 잠재적으로 영향을 받을 수 있는 CVE-2023-3519 제로데이를 활용하는 공격의 증가하는 양은 방어자로부터의 초고속 대응을 요구합니다. 관련 침해 지표의 존재를 검색하고 SIEM 또는 EDR 환경에서 실행할 준비가 된 IOC 쿼리를 즉시 생성하려면 Uncoder AI 를 신뢰하세요.

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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.

CVE-2023-3519 탐지: Citrix NetScaler ADC 및 NetScaler Gateway에서 원격 코드 실행 제로데이 공격이 활발히 악용됨

CVE-2023-3519 익스플로잇 시도 탐지

CVE-2023-3519 분석

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CVE-2023-3519 탐지: Citrix NetScaler ADC 및 NetScaler Gateway에서 원격 코드 실행 제로데이 공격이 활발히 악용됨

CVE-2023-3519 익스플로잇 시도 탐지

CVE-2023-3519 분석

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