CVE-2016-6302

Publication date 16 September 2016

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

The tls_decrypt_ticket function in ssl/t1_lib.c in OpenSSL before 1.1.0 does not consider the HMAC size during validation of the ticket length, which allows remote attackers to cause a denial of service via a ticket that is too short.

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

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=1bbe48ab149893a78bf99c8eb8895c928900a16f Upstream: https://git.openssl.org/?p=openssl.git;a=commit;h=baaabfd8fdcec04a691695fad9a664bea43202b6 Upstream: https://git.openssl.org/?p=openssl.git;a=commit;h=e97763c92c655dcf4af2860b3abd2bc4c8a267f9

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