Citrix : Security Vulnerabilities, CVEs, (Code Execution)

A vulnerability has been discovered in the Citrix Secure Access client for Ubuntu which, if exploited, could allow an attacker to remotely execute code if a victim user opens an attacker-crafted link and accepts further prompts.

Improper Control of Generation of Code ('Code Injection') in NetScaler ADC and NetScaler Gateway allows an attacker with access to NSIP, CLIP or SNIP with management interface to perform Authenticated (low privileged) remote code execution on Management Interface.

Unauthenticated remote code execution

In Citrix XenMobile Server through 10.12 RP9, there is an Authenticated Command Injection vulnerability, leading to remote code execution with root privileges.

In Citrix XenMobile Server through 10.12 RP9, there is an Authenticated Directory Traversal vulnerability, leading to remote code execution.

An arbitrary file write issue exists in all versions of Citrix ShareFile StorageZones (aka storage zones) Controller, including the most recent 5.10.x releases as of May 2020, which allows remote code execution. RCE and file access is granted to everything hosted by ShareFile, be it on-premise or inside Citrix Cloud itself (both are internet facing). NOTE: unlike most CVEs, exploitability depends on the product version that was in use when a particular setup step was performed, NOT the product version that is in use during a current assessment of a CVE consumer's product inventory. Specifically, the vulnerability can be exploited if a storage zone was created by one of these product versions: 5.9.0, 5.8.0, 5.7.0, 5.6.0, 5.5.0, or earlier. This CVE differs from CVE-2020-7473 and CVE-2020-8982.

Citrix Secure Mail for Android before 20.11.0 suffers from improper access control allowing unauthenticated access to read limited calendar related data stored within Secure Mail. Note that a malicious app would need to be installed on the Android device or a threat actor would need to execute arbitrary code on the Android device.

Citrix Secure Mail for Android before 20.11.0 suffers from Improper Control of Generation of Code ('Code Injection') by allowing unauthenticated access to read data stored within Secure Mail. Note that a malicious app would need to be installed on the Android device or a threat actor would need to execute arbitrary code on the Android device.

Unauthenticated remote code execution with root privileges in Citrix SD-WAN Center versions before 11.2.2, 11.1.2b and 10.2.8

* Xen Mobile through 10.8.0 includes a service listening on port 5001 within its firewall that accepts unauthenticated input. If this service is supplied with raw serialised Java objects, it deserialises them back into Java objects in memory, giving rise to a remote code execution vulnerability. NOTE: the vendor disputes that this is a vulnerability, stating it is "already mitigated by the internal firewall that limits access to configuration services to localhost.

The AppFirewall functionality in Citrix NetScaler Application Delivery Controller and NetScaler Gateway 10.5 before Build 68.7, 11.0 before Build 71.24, 11.1 before Build 58.13, and 12.0 before Build 57.24 allows remote attackers to execute arbitrary code via unspecified vectors.

Quick emulator (QEMU) before 2.8 built with the Cirrus CLGD 54xx VGA Emulator support is vulnerable to an out-of-bounds access issue. The issue could occur while copying VGA data in cirrus_bitblt_cputovideo. A privileged user inside guest could use this flaw to crash the QEMU process OR potentially execute arbitrary code on host with privileges of the QEMU process.

Quick emulator (QEMU) built with the Cirrus CLGD 54xx VGA emulator support is vulnerable to an out-of-bounds access issue. It could occur while copying VGA data via bitblt copy in backward mode. A privileged user inside a guest could use this flaw to crash the QEMU process resulting in DoS or potentially execute arbitrary code on the host with privileges of QEMU process on the host.

Citrix Provisioning Services before 7.12 allows attackers to execute arbitrary code by overwriting a function pointer.

Use-after-free vulnerability in Citrix Provisioning Services before 7.12 allows attackers to execute arbitrary code via unspecified vectors.

Buffer overflow in Citrix Provisioning Services before 7.12 allows attackers to execute arbitrary code via unspecified vectors.

A heap buffer overflow flaw was found in QEMU's Cirrus CLGD 54xx VGA emulator's VNC display driver support before 2.9; the issue could occur when a VNC client attempted to update its display after a VGA operation is performed by a guest. A privileged user/process inside a guest could use this flaw to crash the QEMU process or, potentially, execute arbitrary code on the host with privileges of the QEMU process.

Xen, when running on a 64-bit hypervisor, allows local x86 guest OS users to modify arbitrary memory and consequently obtain sensitive information, cause a denial of service (host crash), or execute arbitrary code on the host by leveraging broken emulation of bit test instructions.

The VGA module in QEMU improperly performs bounds checking on banked access to video memory, which allows local guest OS administrators to execute arbitrary code on the host by changing access modes after setting the bank register, aka the "Dark Portal" issue.

Citrix Command Center before 5.1 Build 35.4 and 5.2 before Build 42.7 does not properly restrict access to the Advent Java Management Extensions (JMX) Servlet, which allows remote attackers to execute arbitrary code via unspecified vectors to servlets/Jmx_dynamic.

Unspecified vulnerability in the management interface in Citrix NetScaler Application Delivery Controller (ADC) and NetScaler Gateway 10.x before 10.1-129.11 and 10.5 before 10.5-50.10 allows remote attackers to execute arbitrary code via unknown vectors.

The XML Service interface in Citrix XenApp 6.5 and 6.5 Feature Pack 1 allows remote attackers to execute arbitrary code via unspecified vectors.

Citrix XenApp Online Plug-in for Windows 12.1 and earlier, and Citrix Receiver for Windows 3.2 and earlier could allow remote attackers to execute arbitrary code by convincing a target to open a specially crafted file from an SMB or WebDAV fileserver.

Heap-based buffer overflow in the SoapServer service in Citrix Provisioning Services 5.0, 5.1, 5.6, 5.6 SP1, 6.0, and 6.1 allows remote attackers to execute arbitrary code via a crafted string associated with date and time data.

The NSEPA.NsepaCtrl.1 ActiveX control in nsepa.ocx in Citrix Access Gateway Enterprise Edition 8.1 before 8.1-67.7, 9.0 before 9.0-70.5, and 9.1 before 9.1-96.4 attempts to validate signed DLLs by checking the certificate subject, not the signature, which allows man-in-the-middle attackers to execute arbitrary code via HTTP header data referencing a DLL that was signed with a crafted certificate.