CVE-2016-0701

Publication date 28 January 2016

Last updated 25 August 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

3.7 · Low

Score breakdown

Description

The DH_check_pub_key function in crypto/dh/dh_check.c in OpenSSL 1.0.2 before 1.0.2f does not ensure that prime numbers are appropriate for Diffie-Hellman (DH) key exchange, which makes it easier for remote attackers to discover a private DH exponent by making multiple handshakes with a peer that chose an inappropriate number, as demonstrated by a number in an X9.42 file.

Read the notes from the security team

Status

Package Ubuntu Release Status
openssl 15.10 wily
Fixed 1.0.2d-0ubuntu1.3
15.04 vivid
Not affected
14.04 LTS trusty
Not affected
12.04 LTS precise
Not affected
openssl098 15.10 wily Not in release
15.04 vivid
Not affected
14.04 LTS trusty Not in release
12.04 LTS precise
Not affected

Notes

mdeslaur

1.0.2 only

Patch details

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

Package Patch details
openssl

Severity score breakdown

CVSS version: CVSS v3.0

Base score 3.7 · Low

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

References

Related Ubuntu Security Notices (USN)

    • USN-2883-1
    • OpenSSL vulnerability
    • 28 January 2016

Other references

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