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CVE-2018-8970

N/A
Published: March 24, 2018 at 09:00 PM UTC
Updated: June 17, 2026 at 02:05 AM UTC
1 product affected across 1 vendorLibressl

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Severity
N/A
Exploit prediction
EPSS 1%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (3)

x_refsource_MISCThird Party Advisory
Source: [email protected]
https://boringssl.googlesource.com/boringssl/+/e759a9cd84198613199259dbed401f4951747cff
x_refsource_MISCVendor Advisory
Source: [email protected]
https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-2.7.1-relnotes.txt
x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/libressl-portable/openbsd/commit/0654414afcce51a16d35d05060190a3ec4618d42

CVSS

5.8MEDIUM[email protected]
Confidentiality
PARTIAL
Integrity
PARTIAL
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-295

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