CVE-2016-2179

Publication date 16 September 2016

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

The DTLS implementation in OpenSSL before 1.1.0 does not properly restrict the lifetime of queue entries associated with unused out-of-order messages, which allows remote attackers to cause a denial of service (memory consumption) by maintaining many crafted DTLS sessions simultaneously, related to d1_lib.c, statem_dtls.c, statem_lib.c, and statem_srvr.c.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
openssl	19.04 disco	Fixed 1.0.2g-1ubuntu9
	18.10 cosmic	Fixed 1.0.2g-1ubuntu9
	18.04 LTS bionic	Fixed 1.0.2g-1ubuntu9
	17.10 artful	Fixed 1.0.2g-1ubuntu9
	17.04 zesty	Fixed 1.0.2g-1ubuntu9
	16.10 yakkety	Fixed 1.0.2g-1ubuntu9
	16.04 LTS xenial	Fixed 1.0.2g-1ubuntu4.4
	14.04 LTS trusty	Fixed 1.0.1f-1ubuntu2.20
	12.04 LTS precise	Fixed 1.0.1-4ubuntu5.37
openssl098	19.04 disco	Not in release
	18.10 cosmic	Not in release
	18.04 LTS bionic	Not in release
	17.10 artful	Not in release
	17.04 zesty	Not in release
	16.10 yakkety	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
	12.04 LTS precise	Ignored end of life

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
openssl	Upstream: https://git.openssl.org/?p=openssl.git;a=commit;h=00a4c1421407b6ac796688871b0a49a179c694d9 Upstream: https://git.openssl.org/?p=openssl.git;a=commit;h=26f2c5774f117aea588e8f31fad38bcf14e83bec

Severity score breakdown

Parameter	Value
Base score	7.5 · High
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

Related Ubuntu Security Notices (USN)

USN-3087-1
OpenSSL vulnerabilities
22 September 2016