CVE-2016-9243

Publication date 9 November 2016

Last updated 11 September 2024

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

7.5 · High

Score breakdown

HKDF in cryptography before 1.5.2 returns an empty byte-string if used with a length less than algorithm.digest_size.

Status

Package Ubuntu Release Status
python-cryptography 16.10 yakkety
Fixed 1.5-2ubuntu0.1
16.04 LTS xenial
Fixed 1.2.3-1ubuntu0.1
14.04 LTS trusty Not in release
12.04 LTS precise Not in release

Patch details

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

Package Patch details
python-cryptography

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 High
Availability impact None
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

References

Related Ubuntu Security Notices (USN)

    • USN-3138-1
    • python-cryptography vulnerability
    • 28 November 2016

Other references