Denial of service in OpenSSL - CVE-2016-6304

Vulnerability identifier: #VU819

CSH Severity: Low

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-2016-6304

CWE-ID: CWE-400

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote unauthenticated user to cause DoS conditions on the target system.
The weakness is due to insufficient validation of input length. By sending messages with excessive length attackers can cause resource exhaustion that leads to denial of service
Successful exploitation of the vulnerability allows a malicious user to trigger the vulnerable service to deny.

OpenSSL
Arch Linux
Gentoo Linux
Fedora
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux for Power, big endian
Red Hat Enterprise Linux for Scientific Computing
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux Server - TUS
Red Hat Enterprise Linux for Power, big endian - Extended Update Support
Red Hat Enterprise Linux Server - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux EUS Compute Node
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Slackware Linux
openssl (Alpine package)
lib32-openssl
openssl (Red Hat package)
openssl101e
openssl
openssl-solibs
dev-libs/openssl

Update 1.1.0 to version 1.1.0a.
Update 1.0.2 to version 1.0.2i.
Update 1.0.1 to version 1.0.1u.

openssl (Alpine package) - update to 1.0.1u-r0
lib32-openssl - update to 1
openssl (Red Hat package) - addressed in versions 1.0.0-20.el6_2.9, 1.0.0-27.el6_4.6, 1.0.1e-16.el6_5.17, 1.0.1e-30.el6_6.13, 1.0.1e-42.el6_7.6, 1.0.1e-48.el6_8.3, 1.0.1e-51.el7_2.7
openssl101e - update to 1.0.1e-9.el5
openssl - addressed in versions 1.0.1u, 1.0.2i
openssl-solibs - addressed in versions 1.0.1u, 1.0.2i
openssl - update to 1.0.2.i-1
dev-libs/openssl - update to 1.0.2j
openssl - addressed in versions 1.0.2j-1.fc23, 1.0.2j-1.fc24, 1.0.2j-1.fc25

• https://www.openssl.org/news/secadv/20160922.txt

• Denial of service in OpenSSL
• Denial of service in openssl (Alpine package)
• Gentoo update for OpenSSL
• Slackware Linux update for openssl
• Arch Linux update for lib32-openssl
• Arch Linux update for openssl
• Fedora 24 update for openssl
• Fedora 23 update for openssl
• Fedora 25 update for openssl
• Fedora EPEL 5 update for openssl101e
• Red Hat Enterprise Linux 6 and Red Hat Enterprise Linux 7 update for openssl
• Red Hat Enterprise Linux 6 update for openssl