HIGH
In Nimbus JOSE+JWT before 4.39, there is no integer-overflow check when converting length values from bytes to bits, which allows attackers to conduct HMAC bypass attacks by shifting Additional Authenticated Data (AAD) and ciphertext so that different plaintext is obtained for the same HMAC
Published Aug 20, 2017
7.5
HIGHCVSS 3.0
EPSS 0.89%
Description
In Nimbus JOSE+JWT before 4.39, there is no integer-overflow check when converting length values from bytes to bits, which allows attackers to conduct HMAC bypass attacks by shifting Additional Authenticated Data (AAD) and ciphertext so that different plaintext is obtained for the same HMAC.
Affected products
No data.
OR
- 1.0
- 1.1
- 1.2
- 1.3
- 1.4
- 1.5
- 1.6
- 1.7
- 1.8
- 1.9
- 1.9.1
- 1.10
- 1.11
- 1.12
- 2.0
- 2.0.1
- 2.1
- 2.1.1
- 2.2
- 2.3
- 2.4
- 2.5
- 2.6
- 2.7
- 2.8
- 2.9
- 2.10
- 2.10.1
- 2.11.0
- 2.12.0
- 2.13.0
- 2.13.1
- 2.14
- 2.15
- 2.15.1
- 2.15.2
- 2.16
- 2.17
- 2.17.1
- 2.17.2
- 2.18
- 2.18.1
- 2.18.2
- 2.19
- 2.19.1
- 2.20
- 2.21
- 2.22
- 2.22.1
- 2.23
- 2.24
- 2.25
- 2.26
- 2.26.1
- 3.0
- 3.1
- 3.1.1
- 3.1.2
- 3.2
- 3.2.1
- 3.2.2
- 3.3
- 3.4
- 3.5
- 3.6
- 3.7
- 3.8
- 3.8.1
- 3.8.2
- 3.9
- 3.9.1
- 3.9.2
- 3.10
- 4.0
- 4.0.1
- 4.1
- 4.1.1
- 4.2
- 4.3
- 4.3.1
- 4.4
- 4.5
- 4.6
- 4.7
- 4.8
- 4.9
- 4.10
- 4.11
- 4.11.1
- 4.11.2
- 4.12
- 4.13
- 4.13.1
- 4.14
- 4.15
- 4.15.1
- 4.16
- 4.16.1
- 4.16.2
- 4.17
- 4.18
- 4.19
- 4.20
- 4.21
- 4.22
- 4.23
- 4.24
- 4.25
- 4.26
- 4.26.1
- 4.27
- 4.27.1
- 4.28
- 4.29
- 4.30
- 4.31
- 4.31.1
- 4.32
- 4.33
- 4.34
- 4.34.1
- 4.34.2
- 4.35
- 4.36.1
- 4.37
- 4.37.1
- 4.38
No data.
No Red Hat product state for this CVE.
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.
7.5 HIGH NVD
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact None
Integrity Impact High
Availability Impact None
5.0 MEDIUM NVD
AV:N/AC:L/Au:N/C:N/I:P/A:N
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact Partial
Availability Impact None
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
0.89% 0.00888
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.00888
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Table of values (9 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.89% (0.00888) | 57.85th | v5 (v2026.06.15) |
| Sep 20, 2026 | 0.89% (0.00888) | 57.77th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.23% (0.00232) | 61.72th | v3 (v2023.03.01) |
| Sep 3, 2023 | 0.23% (0.00232) | 60.63th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.40% (0.00398) | 69.39th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.02% (0.01018) | 40.69th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.02% (0.01018) | 19.50th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.04% (0.01040) | 28.32th | v5 (v2026.06.15) |
| Apr 14, 2021 | 1.04% (0.01040) | 0.00th | v1 |
Weaknesses (1)
References (7)
- https://bitbucket.org/connect2id/nimbus-jose-jwt/commits/0d2bd649ea386539220d4facfe1f65eb1dadb86c x_refsource_CONFIRMThird Party Advisory
- https://bitbucket.org/connect2id/nimbus-jose-jwt/issues/224/byte-to-bit-overflow-in-cbc x_refsource_CONFIRMPatchThird Party Advisory
- https://bitbucket.org/connect2id/nimbus-jose-jwt/src/master/CHANGELOG.txt x_refsource_CONFIRMRelease NotesThird Party Advisory
- https://github.com/advisories/GHSA-2qp9-wg27-9pcv Advisory
- https://lists.apache.org/thread.html/9317fd092b257a0815434b116a8af8daea6e920b6673f4fd5583d5fe%40%3Ccommits.druid.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/9317fd092b257a0815434b116a8af8daea6e920b6673f4fd5583d5fe@%3Ccommits.druid.apache.org%3E
- https://nvd.nist.gov/vuln/detail/CVE-2017-12972
| Link | Providers | Tags |
|---|---|---|
| https://bitbucket.org/connect2id/nimbus-jose-jwt/commits/0d2bd649ea386539220d4facfe1f65eb1dadb86c | x_refsource_CONFIRMThird Party Advisory | |
| https://bitbucket.org/connect2id/nimbus-jose-jwt/issues/224/byte-to-bit-overflow-in-cbc | x_refsource_CONFIRMPatchThird Party Advisory | |
| https://bitbucket.org/connect2id/nimbus-jose-jwt/src/master/CHANGELOG.txt | x_refsource_CONFIRMRelease NotesThird Party Advisory | |
| https://github.com/advisories/GHSA-2qp9-wg27-9pcv | Advisory | |
| https://lists.apache.org/thread.html/9317fd092b257a0815434b116a8af8daea6e920b6673f4fd5583d5fe%40%3Ccommits.druid.apache.org%3E | mailing-listx_refsource_MLIST | |
| https://lists.apache.org/thread.html/9317fd092b257a0815434b116a8af8daea6e920b6673f4fd5583d5fe@%3Ccommits.druid.apache.org%3E | ||
| https://nvd.nist.gov/vuln/detail/CVE-2017-12972 |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Aug 20, 2017
Updated Aug 5, 2024
Reserved Aug 20, 2017
Link CVE-2017-12972
CISA Vulnrichment
GHSA-2QP9-WG27-9PCV Updated n/a