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freebsdFreeBSD3D7DFD63-823B-11EA-B3A8-240A644DD835
HistoryJan 25, 2020 - 12:00 a.m.

Client/server denial of service when handling AES-CTR ciphers

2020-01-2500:00:00
vuxml.freebsd.org
10

5.3 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

LOW

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

5 Medium

CVSS2

Access Vector

NETWORK

Access 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

0.004 Low

EPSS

Percentile

73.9%

JSON

The libssh team reports (originally reported by Yasheng Yang from
Google):

A malicious client or server could crash the counterpart implemented
with libssh AES-CTR ciphers are used and don’t get fully initialized. It
will crash when it tries to cleanup the AES-CTR ciphers when closing the
connection.

OSVersionArchitecturePackageVersionFilename
FreeBSDanynoarchlibssh= 0.8.0UNKNOWN
FreeBSDanynoarchlibssh< 0.8.9UNKNOWN

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5.3 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

LOW

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

5 Medium

CVSS2

Access Vector

NETWORK

Access 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

0.004 Low

EPSS

Percentile

73.9%

JSON
Related for 3D7DFD63-823B-11EA-B3A8-240A644DD835
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