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CVE-2015-1777

16
FAUCET Score

CVE-2015-1777 describes a vulnerability in rhnreg_ks within Red Hat Network Client Tools affecting Red Hat Gluster Storage 2.1 and RHEL 5, 6, and 7. This flaw stems from improper hostname validation in X.509 certificates from SSL servers, enabling remote attackers to disrupt system registration through a man-in-the-middle attack. Rated Medium (CVSS 5.9), the attack requires high complexity but can lead to a high integrity impact, preventing system registration. 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
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:a:redhat:rhn-client-tools:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.9MEDIUM

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.26%
Probability of exploitation in next 30 days
EPSS Percentile
66.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0126 is in the 34th percentile among its peer group of 19,956 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, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

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

Remediation

Vendor Patches (4)

redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: rhn-client-tools
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: rhn-client-tools
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: rhn-client-tools
redhatend of lifevia redhat_api
Product: Red Hat Storage 2.1Fixed in: rhn-client-tools

Vendor Advisories (1)

redhatCVE-2015-1777Moderate

rhn-setup: rhnreg_ks fails to properly validate SSL/TLS certificates

Mar 4, 2015

References

bugzilla.redhat.com / show_bug.cgi
Issue Tracking
openwall.com / lists/oss-security/2015/03/04/7
Mailing List
securityfocus.com / bid/72943
Third Party AdvisoryVDB Entry