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MitreCVE-2020-12457

HistoryAug 21, 2020 - 2:15 p.m.

CVE-2020-12457

2020-08-2114:15:10

CWE-835

mitre

web.nvd.nist.gov

wolfssl

tls 1.3

changecipherspec

denial of service

vulnerability

nvd

cve-2020-12457

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

EPSS

0.001

Percentile

41.7%

JSON

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.

Affected configurations

Nvd

Node

wolfsslwolfsslRange<4.5.0

VendorProductVersionCPE
wolfsslwolfssl*cpe:2.3:a:wolfssl:wolfssl:*:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
wolfssl	wolfssl	*	cpe:2.3:a:wolfssl:wolfssl::::::::

References

github.com/wolfSSL/wolfssl/pull/2927

github.com/wolfSSL/wolfssl/releases/tag/v4.5.0-stable

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

EPSS

0.001

Percentile

41.7%

JSON

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