CVE-2025-1131— Asterisk Unsafe Shell Sourcing in safe_asterisk Leads to Local Privilege Escalation
Quick assessment
Affected
Asterisk Asterisk
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Asterisk是Asterisk开源的一款PBX系统的软件，运行在Linux系统上，支持使用SIP、IAX、H323协议进行IP通话。 Asterisk存在安全漏洞，该漏洞源于未验证/etc/asterisk/startup.d目录中.sh文件的所有权或权限，可能导致本地权限提升。
Possible ATT&CK Techniques 3 AI
T1543 · Create or Modify System Process T1059 · Command and Scripting Interpreter T1068 · Exploitation for Privilege Escalation
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I. Basic Information for CVE-2025-1131
Vulnerability Information
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Vulnerability Title
Asterisk Unsafe Shell Sourcing in safe_asterisk Leads to Local Privilege Escalation
Source: CVE Program / CVE List V5
Vulnerability Description
A local privilege escalation vulnerability exists in the safe_asterisk script included with the Asterisk toolkit package. When Asterisk is started via this script (common in SysV init or FreePBX environments), it sources all .sh files located in /etc/asterisk/startup.d/ as root, without validating ownership or permissions.
Non-root users with legitimate write access to /etc/asterisk can exploit this behaviour by placing malicious scripts in the startup.d directory, which will then execute with root privileges upon service restart.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:N/V:C/RE:H/U:Amber
Source: CVE Program / CVE List V5
Vulnerability Type
对搜索路径元素未加控制
Source: CVE Program / CVE List V5
Vulnerability Title
Asterisk 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Asterisk是Asterisk开源的一款PBX系统的软件，运行在Linux系统上，支持使用SIP、IAX、H323协议进行IP通话。 Asterisk存在安全漏洞，该漏洞源于未验证/etc/asterisk/startup.d目录中.sh文件的所有权或权限，可能导致本地权限提升。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2025-1131
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Vendor Advisories for CVE-2025-1131 (1)
IV. Related Vulnerabilities
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Same vendor: Asterisk
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Same weakness: CWE-427
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V. Comments for CVE-2025-1131
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