CVE-2018-8970

CVSS V2 Medium 5.8 CVSS V3 High 7.4
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.
Overview
  • CVE ID
  • CVE-2018-8970
  • Assigner
  • cve@mitre.org
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2018-03-24T21:29:00
  • Last Modified Date
  • 2018-04-24T16:40:13
Weakness Enumerations
CWE URL
CWE-295 http://cwe.mitre.org/data/definitions/295.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
cpe:2.3:a:openbsd:libressl:2.7.0:*:*:*:*:*:*:* 1 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:N/AC:M/Au:N/C:P/I:P/A:N
  • Access Vector
  • NETWORK
  • Access Compatibility
  • MEDIUM
  • Authentication
  • NONE
  • Confidentiality Impact
  • PARTIAL
  • Integrity Impact
  • PARTIAL
  • Availability Impact
  • NONE
  • Base Score
  • 5.8
  • Severity
  • MEDIUM
  • Exploitability Score
  • 8.6
  • Impact Score
  • 4.9
CVSS Version 3
  • Version
  • 3.0
  • Vector String
  • CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
  • Attack Vector
  • NETWORK
  • Attack Compatibility
  • HIGH
  • Privileges Required
  • NONE
  • User Interaction
  • NONE
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • HIGH
  • Availability Impact
  • NONE
  • Base Score
  • 7.4
  • Base Severity
  • HIGH
  • Exploitability Score
  • 2.2
  • Impact Score
  • 5.2
References
Reference URL Reference Tags
https://github.com/libressl-portable/openbsd/commit/0654414afcce51a16d35d05060190a3ec4618d42 Patch Third Party Advisory
https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-2.7.1-relnotes.txt Vendor Advisory
https://boringssl.googlesource.com/boringssl/+/e759a9cd84198613199259dbed401f4951747cff Third Party Advisory
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2018-8970
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-8970
History
Created Old Value New Value Data Type Notes
2022-05-10 18:45:13 Added to TrackCVE
2022-12-03 03:47:18 2018-03-24T21:29Z 2018-03-24T21:29:00 CVE Published Date updated
2022-12-03 03:47:18 2018-04-24T16:40:13 CVE Modified Date updated
2022-12-03 03:47:18 Analyzed Vulnerability Status updated