CVE-2015-6563

Description

The monitor component in sshd in OpenSSH before 7.0 on non-OpenBSD platforms accepts extraneous username data in MONITOR_REQ_PAM_INIT_CTX requests, which allows local users to conduct impersonation attacks by leveraging any SSH login access in conjunction with control of the sshd uid to send a crafted MONITOR_REQ_PWNAM request, related to monitor.c and monitor_wrap.c.

Category

1.9
CVSS
Severity: Low
CVSS 2.0 •
EPSS 0.20%
Vendor Advisory fedoraproject.org Vendor Advisory apple.com Vendor Advisory gentoo.org Vendor Advisory redhat.com Vendor Advisory opensuse.org Vendor Advisory openssh.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://www.openwall.com/lists/oss-security/2015/08/22/1 mailing list
http://lists.fedoraproject.org/pipermail/package-announce/2015-August/165170.html vendor advisory
http://lists.apple.com/archives/security-announce/2015/Oct/msg00005.html vendor advisory
https://support.apple.com/HT205375
http://www.securityfocus.com/bid/76317 vdb entry
https://github.com/openssh/openssh-portable/commit/d4697fe9a28dab7255c60433e4dd23cf7fce8a8b
http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
https://security.gentoo.org/glsa/201512-04 vendor advisory
http://www.openssh.com/txt/release-7.0 vendor advisory
http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
http://rhn.redhat.com/errata/RHSA-2016-0741.html vendor advisory
http://seclists.org/fulldisclosure/2015/Aug/54 mailing list
http://www.oracle.com/technetwork/topics/security/bulletinjan2016-2867206.html
http://lists.opensuse.org/opensuse-security-announce/2015-09/msg00017.html vendor advisory
https://lists.debian.org/debian-lts-announce/2018/09/msg00010.html mailing list
https://security.netapp.com/advisory/ntap-20180201-0002/
https://www.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-security-advisory-2019-766
https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf

Frequently Asked Questions

What is the severity of CVE-2015-6563?
CVE-2015-6563 has been scored as a low severity vulnerability.
How to fix CVE-2015-6563?
To fix CVE-2015-6563, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2015-6563 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2015-6563 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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