FreeBSD10F7BC76-0335-4A88-B391-0B05B3A8CE1CNSS -- MD5 downgrade in TLS 1.2 signatures
5.9 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
4.3 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:N/I:P/A:N
0.003 Low
EPSS
Percentile
68.9%
The Mozilla Project reports:
Security researcher Karthikeyan Bhargavan reported an
issue in Network Security Services (NSS) where MD5
signatures in the server signature within the TLS 1.2
ServerKeyExchange message are still accepted. This is an
issue since NSS has officially disallowed the accepting MD5
as a hash algorithm in signatures since 2011. This issues
exposes NSS based clients such as Firefox to theoretical
collision-based forgery attacks.
| OS | Version | Architecture | Package | Version | Filename |
|---|---|---|---|---|---|
| FreeBSD | any | noarch | nss | = 3.20 | UNKNOWN |
| FreeBSD | any | noarch | nss | < 3.20.2 | UNKNOWN |
| FreeBSD | any | noarch | linux-c6-nss | = 3.20 | UNKNOWN |
| FreeBSD | any | noarch | linux-c6-nss | < 3.20.2 | UNKNOWN |
| FreeBSD | any | noarch | linux-firefox | < 43.0.2,1 | UNKNOWN |
| FreeBSD | any | noarch | linux-thunderbird | < 38.5.1 | UNKNOWN |
| FreeBSD | any | noarch | linux-seamonkey | < 2.40 | UNKNOWN |
Related
5.9 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
4.3 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:N/I:P/A:N
0.003 Low
EPSS
Percentile
68.9%