CVE-2018-1000119

Sinatra rack-protection versions 1.5.4 and 2.0.0.rc3 and earlier contains a timing attack vulnerability in the CSRF token checking that can result in signatures can be exposed. This attack appear to be exploitable via network connectivity to the ruby application. This vulnerability appears to have been fixed in 1.5.5 and 2.0.0.

Published: 2018-03-07 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2018-1000119 is rated Moderate Risk (45.3/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.43%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2018-1000119

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-11-21 0.34% 0.43% +0.09%
2 2025-11-18 0.45% 0.34% -0.11%
3 2025-08-20 — 0.45% —

Full EPSS history (10 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-1000119

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.9 3.0 MEDIUM
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 2.2 3.6 [email protected]
4.3 2.0 MEDIUM
AV:N/AC:M/Au:N/C:P/I:N/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 8.6 2.9 [email protected]

Weakness enumeration for CVE-2018-1000119

GitHub Security Advisory for CVE-2018-1000119

GHSA-688c-3x49-6rqj · Severity: medium · Ecosystem: rubygems — rack-protection gem timing attack vulnerability when validating CSRF token

OS Trackers for CVE-2018-1000119

vendor priority summary link
redhat medium — https://access.redhat.com/security/cve/CVE-2018-1000119
ubuntu medium CVE-2018-1000119 medium priority: Ubuntu including 1 source packages (ruby-rack-protection), 7 status rows across 7 suites (artful, bionic, cosmic, disco, trusty, upstream, xenial): released 3, not-affected 2, DNE 1, ignored 1. https://ubuntu.com/security/CVE-2018-1000119

Affected software / configurations for CVE-2018-1000119

Vendor Product Version Raw CPE
sinatrarb rack-protection < 1.5.5 cpe:2.3:a:sinatrarb:rack-protection:*:*:*:*:*:*:*:*
sinatrarb rack-protection 2.0.0 cpe:2.3:a:sinatrarb:rack-protection:2.0.0:rc1:*:*:*:*:*:*
sinatrarb rack-protection 2.0.0 cpe:2.3:a:sinatrarb:rack-protection:2.0.0:rc2:*:*:*:*:*:*
sinatrarb rack-protection 2.0.0 cpe:2.3:a:sinatrarb:rack-protection:2.0.0:rc3:*:*:*:*:*:*

References for CVE-2018-1000119

cvelogic Threat Intelligence