CVE-2021-36357 — CRITICAL (9.8)

Vulnerability Description

An issue was discovered in OpenPOWER 2.6 firmware. unpack_timestamp() calls le32_to_cpu() for endian conversion of a uint16_t "year" value, resulting in a type mismatch that can truncate a higher integer value to a smaller one, and bypass a timestamp check. The fix is to use the right endian conversion function.

CVSS Score

9.8

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Openpowerfoundation	Skiboot	2.6

Related Weaknesses (CWE)

CWE-681

References

https://github.com/open-power/skiboot/commit/5be38b672c1410e2f10acd3ad2eecfdc81dPatchThird Party Advisory
https://github.com/open-power/skiboot/commit/5be38b672c1410e2f10acd3ad2eecfdc81dPatchThird Party Advisory

FAQ

What is CVE-2021-36357?

CVE-2021-36357 is a vulnerability with a CVSS score of 9.8 (CRITICAL). An issue was discovered in OpenPOWER 2.6 firmware. unpack_timestamp() calls le32_to_cpu() for endian conversion of a uint16_t "year" value, resulting in a type mismatch that can truncate a higher inte...

How severe is CVE-2021-36357?

CVE-2021-36357 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2021-36357?

Check the references section above for vendor advisories and patch information. Affected products include: Openpowerfoundation Skiboot.