Coverage › CVE-2023-6548

CVE-2023-6548 Mapped Sigma

Citrix NetScaler ADC and NetScaler Gateway Code Injection Vulnerability

Vendor / product

Citrix — NetScaler ADC and NetScaler Gateway

Description (CISA)

Citrix NetScaler ADC and NetScaler Gateway contain a code injection vulnerability that allows for authenticated remote code execution on the management interface with access to NSIP, CLIP, or SNIP.

Added to KEV

2024-01-17

Due date

2024-01-24

Required action

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Known ransomware use

Unknown

CWE

CWE-94

CISA notes

https://support.citrix.com/article/CTX584986/netscaler-adc-and-netscaler-gateway-security-bulletin-for-cve20236548-and-cve20236549
https://nvd.nist.gov/vuln/detail/CVE-2023-6548

Elsewhere

cve.org · NVD · CISA KEV · JSON

ATT&CK techniques · CTID Mappings Explorer, ATT&CK 16.1, KEV snapshot 2025-07-28

1 mapping object across 1 technique. exploitation technique states how the vulnerability is exploited; primary and secondary impact state what exploitation achieves. They are different claims and are labelled as such.

Detection chain · ATT&CK Enterprise v19.2 detection strategies, analytics, log sources

T1055 Process Injection exploitation technique

• DET0508 Behavioral Detection of Process Injection Across Platforms
  AN1399 Windows

  Detects process injection by correlating memory manipulation API calls (e.g., VirtualAllocEx, WriteProcessMemory), suspicious thread creation (e.g., CreateRemoteThread), and unusual DLL loads within another process's context.

  WinEventLog:Sysmon EventCode=10 → DC0035 Process Access

  WinEventLog:Sysmon EventCode=1 → DC0032 Process Creation

  WinEventLog:Sysmon EventCode=7 → DC0016 Module Load

  etw:Microsoft-Windows-Kernel-Process API calls → DC0021 OS API Execution

  Tunable: AccessMask TimeWindow InjectedProcessList
  AN1400 Linux

  Detects ptrace- or memfd-based process injection through audit logs capturing system calls (e.g., ptrace, mmap) targeting running processes along with suspicious file descriptors or memory writes.

  auditd:SYSCALL ptrace, mmap, process_vm_writev → DC0021 OS API Execution

  auditd:SYSCALL open → DC0055 File Access

  linux:procfs /proc/[pid]/maps, /proc/[pid]/mem → DC0020 Process Modification

  Tunable: TargetPIDThreshold TimeWindow
  AN1401 macOS

  Detects memory-based injection by monitoring task_for_pid, mach_vm_write, and dylib injection patterns through DYLD_INSERT_LIBRARIES or manual memory mapping.

  macos:unifiedlog subsystem=com.apple.security, library=libsystem_kernel.dylib → DC0035 Process Access

  macos:endpointsecurity ES_EVENT_TYPE_NOTIFY_EXEC, ES_EVENT_TYPE_NOTIFY_MMAP → DC0034 Process Metadata

  macos:syslog DYLD_INSERT_LIBRARIES anomalies → DC0016 Module Load

  Tunable: TargetProcessSignature MachSyscallContext

Sigma rules tagged attack.t1055 (37)

All 37 rules on the technique page →