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SCA: security update for github.com/lf-edge/eve (GHSA-4jvr-vj2c-8q37)

high Tenable Cloud Security Plugin ID 437539

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - Vault Key Sealed With SHA1 PCRs The measured boot solution implemented in EVE OS leans on a PCR locking
 mechanism. Different parts of the system update different PCR values in the TPM, resulting in a unique
 value for each PCR entry. These PCRs are then used in order to seal/unseal a key from the TPM which is
 used to encrypt/decrypt the “vault” directory. This “vault” directory is the most sensitive point in the
 system and as such, its content should be protected. This mechanism is noted in Zededa’s documentation as
 the “measured boot” mechanism, designed to protect said “vault”. The code that’s responsible for
 generating and fetching the key from the TPM assumes that SHA256 PCRs are used in order to seal/unseal the
 key, and as such their presence is being checked. The issue here is that the key is not sealed using
 SHA256 PCRs, but using SHA1 PCRs. This leads to several issues: • Machines that have their SHA256 PCRs
 enabled but SHA1 PCRs disabled, as well as not sealing their keys at all, meaning the “vault” is not
 protected from an attacker. • SHA1 is considered insecure and reduces the complexity level required to
 unseal the key in machines which have their SHA1 PCRs enabled. An attacker can very easily retrieve the
 contents of the “vault”, which will effectively render the “measured boot” mechanism meaningless.
 (CVE-2023-43635)

See Also

https://github.com/advisories/GHSA-4jvr-vj2c-8q37

Plugin Details

Severity: High

ID: 437539

Version: Revision 1.4

Type: Local

Family: SCA Checks

Published: 2/5/2026

Updated: 7/2/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Medium

Score: 5

Percentile: 94.39

Vendor

Vendor Severity: Medium

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

Vector: CVSS2#AV:L/AC:L/Au:S/C:C/I:C/A:C

CVSS Score Source: CVE-2023-43635

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 2/4/2026

Vulnerability Publication Date: 9/20/2023

Reference Information

CVE: CVE-2023-43635