CVE-2016-6304
openssl: OCSP Status Request extension unbounded memory growth
Severity
ImportantRed Hat Product Security
CVSS 3.0
Review impact separately from score.
Published · September 22, 2016
Updated · September 21, 2026
Description
A memory leak flaw was found in the way OpenSSL handled TLS status request extension data during session renegotiation. A remote attacker could cause a TLS server using OpenSSL to consume an excessive amount of memory and, possibly, exit unexpectedly after exhausting all available memory, if it enabled OCSP stapling support.
Statement
TLS server applications using OpenSSL versions in Red Hat Enterprise Linux 6 and 7 are only affected if they enable OCSP stapling support. Applications not enabling OCSP stapling support are not affected. Few applications implement OCSP stapling support and typically do not enable it by default.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.0 · 7.5CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0 · 5AV:N/AC:L/Au:N/C:N/I:N/A:P
CWE-400 · Uncontrolled Resource Consumption