Race condition in OpenSSL - CVE-2015-3216

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Main Vulnerability Database Vulnerabilities #VU82377

Race condition in OpenSSL - CVE-2015-3216

Published: October 25, 2023


Vulnerability identifier: #VU82377
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2015-3216
CWE-ID: CWE-362
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local user to perform a denial of service attack.

The vulnerability exists due to a race condition in a certain Red Hat patch to the PRNG lock implementation in the ssleay_rand_bytes function in OpenSSL. A local user can exploit the race and cause a denial of service (application crash) by establishing many TLS sessions to a multithreaded server, leading to use of a negative value for a certain length field.


Affected software

OpenSSL
Fedora
openssl
FlashSystem 840 9840-AE1 & 9843-AE1
IBM Integrated Management Module
FlashSystem 900 9840-AE2 and 9843-AE2

How to mitigate CVE-2015-3216

Install updates from vendor's website.

openssl - addressed in versions 1.0.1k-10.fc21, 1.0.1k-10.fc22
FlashSystem 840 9840-AE1 & 9843-AE1 - update to 1.3.0.2
FlashSystem 900 9840-AE2 and 9843-AE2 - update to 1.3.0.2
IBM Integrated Management Module - update to 1.49 YUOOG9A

External References

Related Security Bulletins