VulnerabilityModified

CVE-2021-45450

In Mbed TLS before 2.28.0 and 3.x before 3.1.0, psa_cipher_generate_iv and psa_cipher_encrypt allow policy bypass or oracle-based decryption when the output buffer is at memory locations accessible to an untrusted application.

HIGH 7.5EPSS 1.14%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (1.14%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

CVSS 3.1: 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS: 1.14% probability · 65th percentile
CISA KEV: Not listed
Weakness: CWE-327
Affected: trustedfirmware/mbed tls · fedoraproject/fedora
Source: cve@mitre.org

References

https://github.com/ARMmbed/mbedtls/releases/tag/v2.28.0Release Notes, Third Party Advisory
https://github.com/ARMmbed/mbedtls/releases/tag/v3.1.0Release Notes, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IL66WKJGXY5AXMTFE7QDMGL3RIBD6PX5/Mailing List
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TALJHOYAYSUJTLN6BYGLO4YJGNZUY74W/Mailing List
https://security.gentoo.org/glsa/202301-08Third Party Advisory
https://github.com/ARMmbed/mbedtls/releases/tag/v2.28.0Release Notes, Third Party Advisory
https://github.com/ARMmbed/mbedtls/releases/tag/v3.1.0Release Notes, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IL66WKJGXY5AXMTFE7QDMGL3RIBD6PX5/Mailing List
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TALJHOYAYSUJTLN6BYGLO4YJGNZUY74W/Mailing List
https://security.gentoo.org/glsa/202301-08Third Party Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.