CVE-2020-12457 — HIGH (7.5)

Q: How severe is CVE-2020-12457?

CVE-2020-12457 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2020-12457?

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

Vulnerability Description

An issue was discovered in wolfSSL before 4.5.0. It mishandles the change_cipher_spec (CCS) message processing logic for TLS 1.3. If an attacker sends ChangeCipherSpec messages in a crafted way involving more than one in a row, the server becomes stuck in the ProcessReply() loop, i.e., a denial of service.

CVSS Score

7.5

HIGH

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

HIGH

Affected Products

Vendor	Product	Versions
Wolfssl	Wolfssl	< 4.5.0

Related Weaknesses (CWE)

CWE-835

References

https://github.com/wolfSSL/wolfssl/pull/2927PatchThird Party Advisory
https://github.com/wolfSSL/wolfssl/releases/tag/v4.5.0-stableThird Party Advisory
https://github.com/wolfSSL/wolfssl/pull/2927PatchThird Party Advisory
https://github.com/wolfSSL/wolfssl/releases/tag/v4.5.0-stableThird Party Advisory

FAQ

What is CVE-2020-12457?

CVE-2020-12457 is a vulnerability with a CVSS score of 7.5 (HIGH). An issue was discovered in wolfSSL before 4.5.0. It mishandles the change_cipher_spec (CCS) message processing logic for TLS 1.3. If an attacker sends ChangeCipherSpec messages in a crafted way involv...

How severe is CVE-2020-12457?

CVE-2020-12457 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2020-12457?

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