CVE-2020-8209
published 2020-08-17CVE-2020-8209: Improper access control in Citrix XenMobile Server 10.12 before RP2, Citrix XenMobile Server 10.11 before RP4, Citrix XenMobile Server 10.10 before RP6 and…
PriorityP183high7.5CVSS 3.1
AVNACLPRNUINSUCHINAN
ITWEXPLOITVulnCheck KEV
Exploited in the wild
EPSS
48.66%
98.7th percentile
Improper access control in Citrix XenMobile Server 10.12 before RP2, Citrix XenMobile Server 10.11 before RP4, Citrix XenMobile Server 10.10 before RP6 and Citrix XenMobile Server before 10.9 RP5 and leads to the ability to read arbitrary files.
Affected
8 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| citrix | citrix_endpoint_management | — | — |
| citrix | xenmobile | — | — |
| citrix | xenmobile_server | <= 10.8.0 | — |
| citrix | xenmobile_server | — | — |
| citrix | xenmobile_server | — | — |
| citrix | xenmobile_server | — | — |
| citrix | xenmobile_server | — | — |
| citrix | xenserver | — | — |
Detection & IOCsextracted from sources · hover to see the quote
url/jsp/help-sb-download.jsp?sbFileName=../../../etc/passwd
path/jsp/help-sb-download.jsp
snort
alert http any any -> [$HOME_NET,$HTTP_SERVERS] any (msg:"ET WEB_SPECIFIC_APPS Citrix XenMobile Server Directory Traversal Attempt Inbound (CVE-2020-8209)"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"?sbFileName=../"; fast_pattern; reference:url,github.com/B1anda0/CVE-2020-8209/blob/main/CVE-2020-8209.py; reference:cve,2020-8209; classtype:attempted-admin; sid:2031221; rev:1; metadata:created_at 2020_11_19, cve CVE_2020_8209, deployment Perimeter, deployment Internal, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_11_19, mitre_tactic_id TA0007, mitre_tactic_name Discovery, mitre_technique_id T1083, mitre_technique_name File_And_Directory_Discovery; target:dest_ip;)
- →Exploit requests use HTTP GET to /jsp/help-sb-download.jsp with the query parameter sbFileName containing directory traversal sequences (e.g., ../../../etc/passwd). Match on URI containing '?sbFileName=../'.
- →Successful exploitation returns an HTTP response with headers containing 'fileDownload=true', 'application/octet-stream', and 'attachment;' simultaneously — use these as confirmation matchers.
- →Response body containing the regex 'root:.*:0:0:' confirms successful /etc/passwd file read via LFI.
- →Nuclei template targets max-request: 1 GET request; the vulnerability is unauthenticated (PR:N) and network-reachable (AV:N), so no authentication bypass is needed prior to exploitation.
- ·Affected versions are Citrix XenMobile Server 10.12 before RP2, 10.11 before RP4, 10.10 before RP6, and versions before 10.9 RP5. Detection rules should be scoped to these versions where version fingerprinting is possible. ↗
- ·The Snort/ET rule (sid:2031221) is tagged for both Perimeter and Internal deployment, indicating the traversal attempt should be monitored on both network boundaries.
- ·EPSS score of 0.93007 (99.784th percentile) indicates extremely high real-world exploitation probability; prioritize detection and patching accordingly.
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
nvdv2.05.0MEDIUMAV:N/AC:L/Au:N/C:P/I:N/A:N
vulncheck7.5HIGH
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Citrix
Citrix Endpoint Management (CEM) Security Update
vendor_citrix·2020-09-18·CVSS 6.1
CVE-2020-8208 [MEDIUM] Citrix Endpoint Management (CEM) Security Update
Citrix Endpoint Management (CEM) Security Update
of Problem Multiple vulnerabilities have been discovered in Citrix Endpoint Management (CEM), also referred to as XenMobile. These vulnerabilities have the following identifiers: CVE-2020-8208 CVE-2020-8209 CVE-2020-8210 CVE-2020-8211 CVE-2020-8212 CVE-2020-8253 The following versions of Citrix Endpoint Management (CEM) are affected by critical severity vulnerabilities: XenMobile Server 10.12 before RP2 XenMobile Server 10.11 before RP4 XenMobile Server 10.10 before RP6 XenMobile Server before 10.9 RP5 Customers affected by these critical severity vulnerabilities are strongly recommended to update their deployments immediately. Additionally, the following versions of Citrix Endpoint Management (CEM) are affected by medium and low severity v
Citrix
CVE-2020-8209: Improper access control in Citrix XenMobile Server 10.12 before RP2, Citrix XenMobile Server 10.11 before RP4, Citrix XenMobile Server 10.10 before RP
vendor_citrix·2020-08-17·CVSS 7.5
CVE-2020-8209 [HIGH] CWE-22 CVE-2020-8209: Improper access control in Citrix XenMobile Server 10.12 before RP2, Citrix XenMobile Server 10.11 before RP4, Citrix XenMobile Server 10.10 before RP
CVE-2020-8209: Improper access control in Citrix XenMobile Server 10.12 before RP2, Citrix XenMobile Server 10.11 before RP4, Citrix XenMobile Server 10.10 before RP6 and Citrix XenMobile Server before 10.9 RP5 and leads to the ability to read arbitrary files.
GHSA
GHSA-fx75-7xmm-5hm3: Improper access control in Citrix XenMobile Server 10
ghsa_unreviewed·2022-05-24
CVE-2020-8209 [MEDIUM] GHSA-fx75-7xmm-5hm3: Improper access control in Citrix XenMobile Server 10
Improper access control in Citrix XenMobile Server 10.12 before RP2, Citrix XenMobile Server 10.11 before RP4, Citrix XenMobile Server 10.10 before RP6 and Citrix XenMobile Server before 10.9 RP5 and leads to the ability to read arbitrary files.
VulnCheck
Citrix xenmobile_server Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
vulncheck·2020·CVSS 7.5
CVE-2020-8209 [HIGH] Citrix xenmobile_server Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Citrix xenmobile_server Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Improper access control in Citrix XenMobile Server 10.12 before RP2, Citrix XenMobile Server 10.11 before RP4, Citrix XenMobile Server 10.10 before RP6 and Citrix XenMobile Server before 10.9 RP5 and leads to the ability to read arbitrary files.
Affected: Citrix xenmobile_server
Required Action: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
Exploitation References: https://dashboard.shadowserver.org/statistics/honeypot/vulnerability/map/?day=2023-11-14&host_type=src&vulnerability=cve-2020-8209; https://dashboard.shadowserver.org/statistics/honeypot/vulnerability/map/?day=2023-11-19&host_type=s
Suricata
ET WEB_SPECIFIC_APPS Citrix XenMobile Server Directory Traversal Attempt Inbound (CVE-2020-8209)
suricata·2020-11-19·CVSS 7.5
CVE-2020-8209 [HIGH] ET WEB_SPECIFIC_APPS Citrix XenMobile Server Directory Traversal Attempt Inbound (CVE-2020-8209)
ET WEB_SPECIFIC_APPS Citrix XenMobile Server Directory Traversal Attempt Inbound (CVE-2020-8209)
Rule: alert http any any -> [$HOME_NET,$HTTP_SERVERS] any (msg:"ET WEB_SPECIFIC_APPS Citrix XenMobile Server Directory Traversal Attempt Inbound (CVE-2020-8209)"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"?sbFileName=../"; fast_pattern; reference:url,github.com/B1anda0/CVE-2020-8209/blob/main/CVE-2020-8209.py; reference:cve,2020-8209; classtype:attempted-admin; sid:2031221; rev:1; metadata:created_at 2020_11_19, cve CVE_2020_8209, deployment Perimeter, deployment Internal, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_11_19, mitre_tactic_id TA0007, mitre_tactic_name Discovery, mitre_technique_id T1083,
Nuclei
Citrix XenMobile Server - Local File Inclusion
nuclei·CVSS 7.5
CVE-2020-8209 [HIGH] Citrix XenMobile Server - Local File Inclusion
Citrix XenMobile Server - Local File Inclusion
Citrix XenMobile Server 10.12 before RP2, Citrix XenMobile Server 10.11 before RP4, Citrix XenMobile Server 10.10 before RP6, and Citrix XenMobile Server before 10.9 RP5 are susceptible to local file inclusion vulnerabilities.
reference:
- https://swarm.ptsecurity.com/path-traversal-on-citrix-xenmobile-server/
- https://support.citrix.com/article/CTX277457
- https://nvd.nist.gov/vuln/detail/CVE-2020-8209
Template:
id: CVE-2020-8209
info:
name: Citrix XenMobile Server - Local File Inclusion
author: dwisiswant0
severity: high
description: |
Citrix XenMobile Server 10.12 before RP2, Citrix XenMobile Server 10.11 before RP4, Citrix XenMobile Server 10.10 before RP6, and Citrix XenMobile Server before 10.9 RP5 are susceptible to local file incl
2020-08-17
Published
Exploited in the wild