Lucene search

K
cve[email protected]CVE-2015-5600
HistoryAug 03, 2015 - 1:59 a.m.

CVE-2015-5600

2015-08-0301:59:00
CWE-264
web.nvd.nist.gov
10808
2
openssh
cve-2015-5600
vulnerability
auth2-chall.c
sshd
nvd
denial of service
cpu consumption
brute-force attacks
keyboard-interactive devices

7.1 High

AI Score

Confidence

Low

8.5 High

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

COMPLETE

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

0.164 Low

EPSS

Percentile

95.9%

The kbdint_next_device function in auth2-chall.c in sshd in OpenSSH through 6.9 does not properly restrict the processing of keyboard-interactive devices within a single connection, which makes it easier for remote attackers to conduct brute-force attacks or cause a denial of service (CPU consumption) via a long and duplicative list in the ssh -oKbdInteractiveDevices option, as demonstrated by a modified client that provides a different password for each pam element on this list.

CPENameOperatorVersion
openbsd:opensshopenbsd opensshle6.9

References

Social References

More

7.1 High

AI Score

Confidence

Low

8.5 High

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

COMPLETE

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

0.164 Low

EPSS

Percentile

95.9%