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CVE-2015-6563

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Date: August 23, 2015

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.

Language: C

Severity Score

Related Resources (21)

https://www.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-security-advisory-2019-766
http://lists.fedoraproject.org/pipermail/package-announce/2015-August/165170.html
https://security.gentoo.org/glsa/201512-04
https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
https://support.apple.com/HT205375
http://www.securityfocus.com/bid/76317
https://github.com/openssh/openssh-portable/commit/d4697fe9a28dab7255c60433e4dd23cf7fce8a8b
http://rhn.redhat.com/errata/RHSA-2016-0741.html
https://access.redhat.com/security/cve/CVE-2015-6563
http://www.oracle.com/technetwork/topics/security/bulletinjan2016-2867206.html
http://lists.opensuse.org/opensuse-security-announce/2015-09/msg00017.html
https://security.netapp.com/advisory/ntap-20180201-0002/
http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
https://nvd.nist.gov/vuln/detail/CVE-2015-6563
http://www.openwall.com/lists/oss-security/2015/08/22/1
http://seclists.org/fulldisclosure/2015/Aug/54
http://www.openssh.com/txt/release-7.0
http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
http://lists.apple.com/archives/security-announce/2015/Oct/msg00005.html
https://lists.debian.org/debian-lts-announce/2018/09/msg00010.html
https://www.mend.io/vulnerability-database/CVE-2015-6563

Severity Score

Weakness Type (CWE)

Input Validation

CWE-20

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): HIGH
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): LOW
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV): LOCAL
Access Complexity (AC): MEDIUM
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): PARTIAL
Availability (A): NONE
Additional information:

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