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CVE-2015-6563

17
FAUCET Score

CVE-2015-6563 describes a vulnerability in OpenSSH before version 7.0 on non-OpenBSD platforms, specifically affecting the sshd monitor component. This flaw allows local users with SSH login access and control over the sshd UID to impersonate other users by sending crafted requests. The vulnerability has a low CVSS score of 1.9, indicating a local attack vector with medium complexity and a potential impact of partial integrity compromise. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 6.9CPE matchmatch criteria
cpe:2.3:a:openbsd:openssh:*:*:*:*:*:*:*:*
<= 10.11.0CPE matchmatch criteria
cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

1.9LOW

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

Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
Access Vector
LOCAL
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
3.4
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
0.38%
Probability of exploitation in next 30 days
EPSS Percentile
30.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0038 is in the 84th percentile among its peer group of 418 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (4)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: openssh-0:5.3p1-117.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: openssh-0:6.6.1p1-22.el7
View patch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: openssh
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: openssh

Vendor Advisories (1)

redhatCVE-2015-6563Moderate

openssh: Privilege separation weakness related to PAM support

Aug 11, 2015

References

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