NULL pointer dereference in OpenSSL - CVE-2009-1387

CSH
CYBERSECURITY HELP
Sign In REGISTER
 
Main Vulnerability Database Vulnerabilities #VU45695

NULL pointer dereference in OpenSSL - CVE-2009-1387

Published: August 14, 2020


Vulnerability identifier: #VU45695
CSH Severity: Medium
CVSS v4: 8.7 [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]
CVE-ID: CVE-2009-1387
CWE-ID: CWE-476
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

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

The vulnerability exists due to a NULL pointer dereference error in the  dtls1_retrieve_buffered_fragment function in ssl/d1_both.c in OpenSSL. A remote attacker can pass specially crafted data to the application and perform a denial of service (DoS) attack via an out-of-sequence DTLS handshake message, related to a "fragment bug.".


Affected software

OpenSSL
openssl (Alpine package)

How to mitigate CVE-2009-1387

Install update from vendor's website.

OpenSSL - update to 1.0.0
openssl (Alpine package) - addressed in versions 0.9.8m-r0, 0.9.8l-r1

External References

Related Security Bulletins