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Debian Security Advisory DSA 3967-1 (mbedtls - security update)

Information

Severity

Severity

Medium

Family

Family

Debian Local Security Checks

CVSSv2 Base

CVSSv2 Base

6.8

CVSSv2 Vector

CVSSv2 Vector

AV:N/AC:M/Au:N/C:P/I:P/A:P

Solution Type

Solution Type

Vendor Patch

Created

Created

4 years ago

Modified

Modified

8 months ago

Summary

An authentication bypass vulnerability was discovered in mbed TLS, a lightweight crypto and SSL/TLS library, when the authentication mode is configured as optional . A remote attacker can take advantage of this flaw to mount a man-in-the-middle attack and impersonate an intended peer via an X.509 certificate chain with many intermediates.

Affected Software

Affected Software

mbedtls on Debian Linux

Detection Method

Detection Method

This check tests the installed software version using the apt package manager.

Solution

Solution

For the stable distribution (stretch), this problem has been fixed in version 2.4.2-1+deb9u1. For the testing distribution (buster), this problem has been fixed in version 2.6.0-1. For the unstable distribution (sid), this problem has been fixed in version 2.6.0-1. We recommend that you upgrade your mbedtls packages.

Common Vulnerabilities and Exposures (CVE)