CVE-2019-25607
Published: 22 March 2026
Summary
CVE-2019-25607 is a high-severity Out-of-bounds Write (CWE-787) vulnerability in Labf (inferred from references). Its CVSS base score is 8.6 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Privilege Escalation (T1068); ranked at the 4.7th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-2 (Flaw Remediation).
Deeper analysis
CVE-2019-25607 is a stack-based buffer overflow vulnerability in Axessh version 4.2, specifically affecting the log file name field. Local attackers can exploit this by supplying an excessively long filename, overflowing the buffer at an offset of 214 bytes to overwrite the instruction pointer and execute arbitrary shellcode with system privileges. The issue is classified under CWE-787 (Out-of-bounds Write) and carries a CVSS v3.1 base score of 8.4 (AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H), indicating high severity due to its potential for complete system compromise.
The vulnerability can be exploited by local attackers with no required privileges (PR:N), low attack complexity (AC:L), and no user interaction (UI:N). Successful exploitation allows arbitrary code execution with system-level privileges, potentially granting full control over the affected system, including high impacts on confidentiality, integrity, and availability.
References for CVE-2019-25607 include the vendor site at http://www.labf.com and a download link for axessh.exe at http://www.labf.com/download/axessh.exe, alongside Exploit-DB entries such as exploits at https://www.exploit-db.com/exploits/46858 and https://www.exploit-db.com/exploits/46922, and a shellcode at https://www.exploit-db.com/shellcodes/46281, indicating public proof-of-concept exploits are available. No specific mitigation or patch details are provided in the given information.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2019-19955
Vulnerability details
Axessh 4.2 contains a stack-based buffer overflow vulnerability in the log file name field that allows local attackers to execute arbitrary code by supplying an excessively long filename. Attackers can overflow the buffer at offset 214 bytes to overwrite the…
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instruction pointer and execute shellcode with system privileges.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Local stack buffer overflow in Axessh log filename field enables arbitrary shellcode execution with system privileges via direct instruction pointer overwrite.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Establishes a risk-based process to identify, prioritize, and remediate the stack-based buffer overflow flaw in Axessh, directly preventing exploitation through patching or upgrades.
Validates the length and format of log file name inputs to ensure they do not exceed buffer boundaries, preventing the out-of-bounds write condition.
Implements memory safeguards like non-executable stacks and address space randomization to block arbitrary code execution even if the buffer overflow occurs.