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hackeronePkkothawadeH1:199436
HistoryJan 18, 2017 - 5:43 p.m.

Yelp: Yelp.com is vulnerable to SWEET32 attack

2017-01-1817:43:32
pkkothawade
hackerone.com
53

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

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

5 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

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

0.004 Low

EPSS

Percentile

71.1%

Researchers have found new attack against 3DES-CBC cipher in TLS,that they can decrypt customer data using a method called SWEET32 Birthday Attack.

This Vulnerability has got CVE-2016-2183 and has cvss score 5.0

This vulnerability can be found manually by simply using nmap script

nmap -Pn -p --script ssl-enum-ciphers ip

Mitigation for SWEET32 attack

->Prefer minimum 128-bit cipher suites

->Limit the length of TLS sessions with a 64-bit cipher, which could be done with TLS renegotiation or closing and starting a new connection

-> Disable cipher suites using 3DES
Reference link: https://sweet32.info/

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

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

5 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

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

0.004 Low

EPSS

Percentile

71.1%