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Fencer Vulns
low 2.6

CVE-2022-4087 json

iPXE TLS tls.c tls_new_ciphertext information exposure

published 2022-11-21 3 y ago modified 2026-06-17 4 mo ago also EUVD-2022-51458

cvss
2.6
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 45%
public exploits
0
none known

Summary

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.

Patch / fix

  • ipxe ipxe 2022-11-08

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2022-4087 updated cvss 4.3

ipxe: Padding oracle attack vulnerability

  • Red Hat Enterprise Linux 7 ipxe-roms, ipxe-bootimgs, ipxe-roms-qemu
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 8 ipxe-roms, ipxe-bootimgs, ipxe-roms-qemu, ipxe-bootimgs-x86, ipxe-bootimgs-aarch64 Red Hat Enterprise Linux 9 ipxe-roms, ipxe-roms-qemu, ipxe-bootimgs-x86, ipxe-bootimgs-aarch64
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
18 mo ago

Exploit prediction

0.54% chance of exploitation in the next 30 days, higher than 45% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 2.6 CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
NVD 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Affected products

  • unspecified iPXE

Classification

Weakness

References

Sources

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.