CVE-2015-5600
- State
- Published
- Severity
- 8.1 High
- Published
- Aug 3, 2015
- Updated
- May 27, 2026
- Reserved
- Jul 20, 2015
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 8.1 High | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H | CISA-ADP |
Weaknesses
- CWE-400 Uncontrolled Resource Consumption
Affected Products
| Product | Versions |
|---|---|
n/an/a |
|
References
- http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
- USN-2710-2vendor-advisory
- FEDORA-2015-13469vendor-advisory
- http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05157667
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05128992
- http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
- http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html
- GLSA-201512-04vendor-advisory
- https://kc.mcafee.com/corporate/index?page=content&id=SB10136
- https://security.netapp.com/advisory/ntap-20151106-0001/
- RHSA-2016:0466vendor-advisory
- http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/auth2-chall.c.diff?r1=1.42&r2=1.43&f=h
- http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
- http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10697
- APPLE-SA-2015-08-13-2vendor-advisory
- http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/auth2-chall.c
- https://kc.mcafee.com/corporate/index?page=content&id=SB10157
- 75990vdb-entry
- 91787vdb-entry
- https://h20564.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c04952480
- SUSE-SU-2015:1581vendor-advisory
- 92012vdb-entry
- https://support.apple.com/kb/HT205031
- [debian-lts-announce] 20180910 [SECURITY] [DLA 1500-1] openssh security updatemailing-list
- [oss-security] 20150723 Re: CVE Request for OpenSSH vulnerability - authentication limits bypassmailing-list
- USN-2710-1vendor-advisory
- FEDORA-2015-11981vendor-advisory
- 1032988vdb-entry
- 20150717 OpenSSH keyboard-interactive authentication brute force vulnerability (MaxAuthTries bypass)mailing-list
- http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html
- https://www.arista.com/en/support/advisories-notices/security-advisories/1174-security-advisory-12
- https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
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