Upstream information

CVE-2018-8970 at MITRE

Description

The int_x509_param_set_hosts function in lib/libcrypto/x509/x509_vpm.c in LibreSSL 2.7.0 before 2.7.1 does not support a certain special case of a zero name length, which causes silent omission of hostname verification, and consequently allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate. NOTE: the LibreSSL documentation indicates that this special case is supported, but the BoringSSL documentation does not.

SUSE information

Overall state of this security issue: Does not affect SUSE products

This issue is currently rated as having important severity.

CVSS v2 Scores
  National Vulnerability Database
Base Score 5.8
Vector AV:N/AC:M/Au:N/C:P/I:P/A:N
Access Vector Network
Access Complexity Medium
Authentication None
Confidentiality Impact Partial
Integrity Impact Partial
Availability Impact None
CVSS v3 Scores
  National Vulnerability Database
Base Score 7.4
Vector AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Access Vector Network
Access Complexity High
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact High
Integrity Impact High
Availability Impact None
SUSE Bugzilla entry: 1086778 [RESOLVED / FIXED]

SUSE Security Advisories:

List of released packages

Product(s) Fixed package version(s) References
openSUSE Leap 42.3
  • libcrypto43 >= 2.8.0-11.1
  • libcrypto43-32bit >= 2.8.0-11.1
  • libcrypto43-debuginfo >= 2.8.0-11.1
  • libcrypto43-debuginfo-32bit >= 2.8.0-11.1
  • libressl >= 2.8.0-11.1
  • libressl-debuginfo >= 2.8.0-11.1
  • libressl-debugsource >= 2.8.0-11.1
  • libressl-devel >= 2.8.0-11.1
  • libressl-devel-32bit >= 2.8.0-11.1
  • libressl-devel-doc >= 2.8.0-11.1
  • libssl45 >= 2.8.0-11.1
  • libssl45-32bit >= 2.8.0-11.1
  • libssl45-debuginfo >= 2.8.0-11.1
  • libssl45-debuginfo-32bit >= 2.8.0-11.1
  • libtls17 >= 2.8.0-11.1
  • libtls17-32bit >= 2.8.0-11.1
  • libtls17-debuginfo >= 2.8.0-11.1
  • libtls17-debuginfo-32bit >= 2.8.0-11.1
Patchnames:
openSUSE-2018-953