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CVE-2017-15804

32
FAUCET Score

CVE-2017-15804 describes a critical buffer overflow vulnerability in the glob function of the GNU C Library (glibc) versions prior to 2.27, specifically during the unescaping of usernames using the tilde (~) operator. This flaw carries a CVSS v3.0 score of 9.8 (CRITICAL), indicating it can be exploited remotely with low complexity and no user interaction, potentially leading to complete compromise of confidentiality, integrity, and availability. While there is no evidence of active exploitation, no known public exploit code (Metasploit, Nuclei, ExploitDB), or KEV listing, the vulnerability has garnered significant community discussion, with 10 mentions, suggesting awareness among security researchers.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.26CPE matchmatch criteria
cpe:2.3:a:gnu:glibc:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.80%
Probability of exploitation in next 30 days
EPSS Percentile
85.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0280 is in the 76th percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: glibc-0:2.12-1.212.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: glibc-0:2.17-222.el7
View patch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: compat-glibc

Vendor Advisories (1)

redhatCVE-2017-15804Moderate

glibc: Buffer overflow during unescaping of user names with the ~ operator

Oct 21, 2017

References

access.redhat.com / errata/RHSA-2018:0805
access.redhat.com / errata/RHSA-2018:1879
sourceware.org / bugzilla/show_bug.cgi
Issue TrackingPatchThird Party Advisory
sourceware.org / git/gitweb.cgi
securityfocus.com / bid/101535