CVE-2018-8970

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 v3.0

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

CVSS v2.0

5.8 MEDIUMAV:N/AC:M/Au:N/C:P/I:P/A:N

EPSS

1.04% chance of exploitation in the next 30 days, 62th percentile

Published

2018-03-24

Updated

2024-08-05

Proof-of-concept exploits (1)

• tiran/CVE-2018-89701★ · 2018-03-25

References

• CVE Record
• NVD entry

Related

• CVE-2018-8969
• CVE-2018-8973
• CVE-2018-8968
• CVE-2018-8974
• CVE-2018-8967
• CVE-2018-8975