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CVE-2018-8970

UNKNOWN
Published 2018-03-24T21:00:00
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No CVSS data available

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.

Available Exploits

No exploits available for this CVE.

Related News

No news articles found for this CVE.

GitHub Security Advisories

Community-driven vulnerability intelligence from GitHub

⚠ Unreviewed HIGH

GHSA-7gr4-mrjx-cjx9

Advisory Details

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.

CVSS Scoring

CVSS Score

7.5

CVSS Vector

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

References

ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2018-8970
WEB https://github.com/libressl-portable/openbsd/commit/0654414afcce51a16d35d05060190a3ec4618d42
WEB https://boringssl.googlesource.com/boringssl/+/e759a9cd84198613199259dbed401f4951747cff
WEB https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-2.7.1-relnotes.txt

Advisory provided by GitHub Security Advisory Database. Published: May 14, 2022, Modified: May 14, 2022

References

https://github.com/libressl-portable/openbsd/commit/0654414afcce51a16d35d05060190a3ec4618d42
https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-2.7.1-relnotes.txt
https://boringssl.googlesource.com/boringssl/+/e759a9cd84198613199259dbed401f4951747cff

HackerOne Reports

Silent omission of certificate hostname verification in LibreSSL and BoringSSL Critical
tiran
Internet Bug Bounty
Improper Certificate Validation
View Report
Published: 2018-03-24T21:00:00
Last Modified: 2024-08-05T07:10:47.345Z
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