SB2019101412 - Multiple vulnerabilities in Nostromo

Description

This security bulletin contains information about 2 vulnerabilities.

1) Buffer overflow (CVE-ID: CVE-2019-16279)

CWE-ID: CWE-119 - Memory corruption

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to the missing header count functionality in the "http_header_comp()" function. A remote attacker can transmit more headers than accepted by nhttpd, trigger memory corruption and cause a denial of service on the target system.

2) Path traversal (CVE-ID: CVE-2019-16278)

CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Amber

The vulnerability allows a remote attacker to perform directory traversal attacks.

The vulnerability exists due to input validation error in the "http_verify" function when processing directory traversal sequences. A remote attacker can send a specially crafted HTTP request and read arbitrary files on the system.

Note: This vulnerability leads to remote code execution.

Remediation

Install update from vendor's website.

References

• http://www.nazgul.ch/dev/nostromo_cl.txt
• http://packetstormsecurity.com/files/155045/Nostromo-1.9.6-Directory-Traversal-Remote-Command-Execution.html
• https://www.rapid7.com/db/modules/exploit/multi/http/nostromo_code_exec
• https://www.sudokaikan.com/2019/10/cve-2019-16278-unauthenticated-remote.html