CVE-2015-8023 Auth bypass in n/a

What is CVE-2015-8023?

CVE-2015-8023 is a medium-severity authentication bypass vulnerability in Canonical Ubuntu Linux, published on 18 Nov 2015. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

The server implementation of the EAP-MSCHAPv2 protocol in the eap-mschapv2 plugin in strongSwan 4.2.12 through 5.x before 5.3.4 does not properly validate local state, which allows remote attackers to bypass authentication via an empty Success message in response to an initial Challenge message.

Weakness: CWE-264, CWE-20

Which versions are affected by CVE-2015-8023?

It affects 2 products.

Products include Canonical Ubuntu Linux, Strongswan Strongswan.

How do I fix CVE-2015-8023?

Upgrade to a fixed version.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2015-8023 being exploited?

There is no known exploitation of CVE-2015-8023 in the wild and no public exploit code.

Other vulnerabilities in Canonical Ubuntu Linux

• CVE-2020-11651 SaltStack Salt Authentication Bypass Exploited Critical 9.8
• CVE-2020-7247 OpenSMTPD Remote Code Execution Exploited Critical 9.8
• CVE-2019-16928 Exim Out-of-bounds Write Exploited Critical 9.8
• CVE-2018-6789 Exim Buffer Overflow Exploited Critical 9.8
• CVE-2015-2590 Oracle Java SE and Java SE Embedded Remote Code Execution Exploited Critical 9.8

All Canonical Ubuntu Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2015-8023, DLA-345-1, DSA-3398-1, GHSA-4qm7-rm85-wr68, SUSE-SU-2015:2183-1, SUSE-SU-2015:2183-2 and 3 more.