What’s Vulnerable › Vulnerabilities

CVE-2022-4087: iPXE TLS tls.c tls_new_ciphertext information exposure

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-11-21 · updated 2026-06-17
• Weakness: CWE-284

Description

A vulnerability was found in iPXE. It has been declared as problematic. This vulnerability affects the function tls_new_ciphertext of the file src/net/tls.c of the component TLS. The manipulation of the argument pad_len leads to information exposure through discrepancy. The name of the patch is 186306d6199096b7a7c4b4574d4be8cdb8426729. It is recommended to apply a patch to fix this issue. VDB-214054 is the identifier assigned to this vulnerability.

Affected products

• iPXE: before 2022-11-08 — fixed in 2022-11-08

How to fix

Upgrade to a fixed version: iPXE 2022-11-08. Check the vendor advisory for mitigations.

References

• https://github.com/ipxe/ipxe/commit/186306d6199096b7a7c4b4574d4be8cdb8426729
• https://vuldb.com/?id.214054
• https://github.com/ipxe/ipxe/commit/186306d6199096b7a7c4b4574d4be8cdb8426729
• https://vuldb.com/?id.214054

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