CVE-2015-2318 Information

Description

The TLS stack in Mono before 3.12.1 allows man-in-the-middle attackers to conduct message skipping attacks and consequently impersonate clients by leveraging missing handshake state validation aka a \SMACK SKIP-TLS\ issue.

CVSS Vector

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

Reference

http://www.mono-project.com/news/2015/03/07/mono-tls-vulnerability/ http://www.openwall.com/lists/oss-security/2015/03/17/9 http://www.securityfocus.com/bid/73253 http://www.ubuntu.com/usn/USN-2547-1 https://bugzilla.redhat.com/show_bug.cgi?id=1202869 https://github.com/mono/mono/commit/1509226c41d74194c146deb173e752b8d3cdeec4 https://mitls.org/pages/attacks/SMACKskip https://www.debian.org/security/2015/dsa-3202

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

8.1