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CVE-2018-11778

29
FAUCET Score

CVE-2018-11778 is a stack-based buffer overflow vulnerability affecting Apache Ranger versions prior to 1.2.0, specifically within the UnixAuthenticationService. This high-severity vulnerability (CVSS 8.8) allows an authenticated attacker to achieve high impact on confidentiality, integrity, and availability with low attack complexity. While the vulnerability is not listed in CISA's KEV catalog and has no known public exploits or significant community discussion, affected systems should be upgraded to version 1.2.0 to mitigate the risk.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.2.0CPE matchmatch criteria
cpe:2.3:a:apache:ranger:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

8.8HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
4.01%
Probability of exploitation in next 30 days
EPSS Percentile
89.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0401 is in the 89th percentile among its peer group of 17,808 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 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 (1)

mavenpatch availablevia ghsa
Product: org.apache.ranger:rangerFixed in: 1.2.0

Vendor Advisories (1)

mavenGHSA-c99h-fgqm-6679high

UnixAuthenticationService in Apache Ranger was updated to correctly handle user input to avoid Stack-based buffer overflow

Oct 17, 2018

References

cwiki.apache.org / confluence/display/RANGER/Vulnerabilities+found+in+Ranger
Vendor Advisory
lists.apache.org / thread.html/r04bc435a92911de4b52d2b98f169bd7cf2e8bbeb53b03788df8f932c%40%3Cdev.ranger.apache.org%3E
lists.apache.org / thread.html/rd88077a781ef38f7687c100f93992f4dda8aa101925050c4af470998%40%3Cdev.ranger.apache.org%3E
seclists.org / oss-sec/2018/q4/11
Mailing ListThird Party Advisory