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MitreCVE-2020-12872

HistoryMay 15, 2020 - 7:15 p.m.

CVE-2020-12872

2020-05-1519:15:12

CWE-326

mitre

web.nvd.nist.gov

156

cve-2020-12872

yaws

tls ciphers

sweet32 attacks

erlang/otp

CVSS2

2.1

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

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

CVSS3

5.5

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

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

AI Score

Confidence

High

EPSS

0.001

Percentile

35.3%

JSON

yaws_config.erl in Yaws through 2.0.2 and/or 2.0.7 loads obsolete TLS ciphers, as demonstrated by ones that allow Sweet32 attacks, if running on an Erlang/OTP virtual machine with a version less than 21.0.

Affected configurations

Nvd

Node

yawsyawsRange2.0.2–2.0.6

VendorProductVersionCPE
yawsyaws*cpe:2.3:a:yaws:yaws:*:*:*:*:*:*:*:*

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

References

github.com/erlyaws/yaws/blob/c0fd79f17d52628fcec527da7fa3e788c283c445/src/yaws_config.erl#L2068-L2075

github.com/erlyaws/yaws/issues/402

github.com/erlyaws/yaws/releases

medium.com/%40charlielabs101/cve-2020-12872-df315411aa70

sweet32.info/

CVSS2

2.1

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

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

CVSS3

5.5

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

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

AI Score

Confidence

High

EPSS

0.001

Percentile

35.3%

JSON

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