Authentication Bypass via HTTP Header Spoofing

published 2023-07-18 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-38410

cvss: 9.1; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 1.2%; EPSS 1.2% chance of exploitation in 30 days, percentile 68%
public exploits: 0; none known

AMI MegaRAC SPx12 contains a vulnerability in BMC where a User may cause an authentication bypass by spoofing the HTTP header. A successful exploit of this vulnerability may lead to loss of confidentiality, integrity, and availability.

Patch / fix

fixed in 1

AMI MegaRAC_SPx12 12.4

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 2 y ago (2024-10-25)

Exploit prediction

1.19% chance of exploitation in the next 30 days, higher than 68% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	9.1	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
CNA	3.1	8.4	CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
NVD	3.1	8.0	CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

AMI MegaRAC_SPx12

Classification

Weakness

CWE-306 Missing Authentication for Critical Functionality
CWE-290 Authentication Bypass by Spoofing

References

Sources

CVE List CVE-2023-34329
NVD CVE-2023-34329

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary