PT-2019-3511 · Microsoft · Windows

Thijs Alkemade + 1 · Published 2019-10-08 · Updated 2026-03-01 · CVE-2019-1318

Positive Technologies (AI Summary)

CVSS v3.1

5.9

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Windows versions prior to the fixed version

Description The issue is related to a Transport Layer Security (TLS) protocol implementation flaw in Windows operating systems, specifically concerning session fixation weaknesses. This can be exploited by a remote attacker to gain unauthorized access to protected information by connecting to a peer node. The vulnerability allows for spoofing when TLS accesses non-Extended Master Secret (EMS) sessions.

Recommendations For Windows versions prior to the fixed version, apply the necessary security updates to resolve the issue. As a temporary workaround, consider restricting access to TLS sessions to minimize the risk of exploitation. Avoid using non-Extended Master Secret (EMS) sessions in TLS until the issue is resolved. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Information Disclosure

Authentication Bypass by Spoofing

Weakness Enumeration

CWE-200

CWE-290

Related Identifiers

BDU:2019-03686

CVE-2019-1318

Affected Products

Windows

References · 7

• https://nvd.nist.gov/vuln/detail/CVE-2019-1318 · Security Note
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1318 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2019-1318 · Vendor Advisory
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2019-1318 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-1318 · Security Note
• https://bdu.fstec.ru/vul/2019-03686 · Security Note
• https://t.me/sysadm_in_channel/1223 · Telegram Post