mesos: Exposure of HMAC value via timing vulnerability in JWT validation
Published Sep 21, 2018
5.9
MEDIUMCVSS 3.0
EPSS 3.06%
Description
Apache Mesos can be configured to require authentication to call the Executor HTTP API using JSON Web Token (JWT). In Apache Mesos versions pre-1.4.2, 1.5.0, 1.5.1, 1.6.0 the comparison of the generated HMAC value against the provided signature in the JWT implementation used is vulnerable to a timing attack because instead of a constant-time string comparison routine a standard `==` operator has been used. A malicious actor can therefore abuse the timing difference of when the JWT validation function returns to reveal the correct HMAC value.
Affected products
-
- Version 1.5.0, 1.5.1StatusaffectedConstraints-
- Version 1.6.0StatusaffectedConstraints-
- Version versions prior to 1.4.2StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Apache Software Foundation | Apache Mesos | n/a |
|
No data.
Red Hat Fuse 7
mesos
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Fuse 7 | mesos | Not affected | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
AV:N/AC:M/Au:N/C:P/I:N/A:N
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (19 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 3.06% (0.03056) | 87.13th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.06% (0.03056) | 85.83th | v5 (v2026.06.15) |
| Nov 21, 2025 | 1.08% (0.01079) | 77.17th | v4 (v2025.03.14) |
| Nov 18, 2025 | 2.55% (0.02548) | 84.18th | v4 (v2025.03.14) |
| Oct 18, 2025 | 1.08% (0.01079) | 77.07th | v4 (v2025.03.14) |
| Mar 30, 2025 | 2.49% (0.02492) | 83.93th | v4 (v2025.03.14) |
| Mar 29, 2025 | 24.38% (0.24380) | 93.70th | v4 (v2025.03.14) |
| Mar 17, 2025 | 1.85% (0.01849) | 81.82th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.07% (0.00072) | 33.16th | v3 (v2023.03.01) |
| Jun 18, 2024 | 0.07% (0.00072) | 31.13th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.07% (0.00072) | 29.13th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00885) | 27.89th | v2 (v2022.01.01) |
| Sep 10, 2022 | 0.89% (0.00885) | 26.24th | v2 (v2022.01.01) |
| Apr 1, 2022 | 0.89% (0.00885) | 24.24th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.89% (0.00885) | 10.50th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.97% (0.01969) | 50.09th | v1 |
| Jan 6, 2022 | 1.97% (0.01969) | 49.58th | v1 |
| Sep 1, 2021 | 1.97% (0.01969) | 76.66th | v1 |
| Apr 14, 2021 | 1.97% (0.01969) | 0.00th | v1 |
References (9)
- https://access.redhat.com/security/cve/CVE-2018-8023 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1632810 Issue Tracking
- https://github.com/advisories/GHSA-c8cc-p3j7-4c7f Advisory
- https://lists.apache.org/thread.html/9b9d3f6bd09f3ebd2284b82077033bdc71da550a1c4c010c2494acc3%40%3Cdev.mesos.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/9b9d3f6bd09f3ebd2284b82077033bdc71da550a1c4c010c2494acc3@%3Cdev.mesos.apache.org%3E
- https://lists.apache.org/thread.html/r0dd7ff197b2e3bdd80a0326587ca3d0c22e10d1dba17c769d6da7d7a%40%3Cuser.flink.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/r0dd7ff197b2e3bdd80a0326587ca3d0c22e10d1dba17c769d6da7d7a@%3Cuser.flink.apache.org%3E
- https://nvd.nist.gov/vuln/detail/CVE-2018-8023
- https://www.cve.org/CVERecord?id=CVE-2018-8023
Change history (0)
No recorded changes yet.