The signature verification routine in the Airmail GPG-PGP Plugin, versions 1.0 (9) and earlier, does not verify the status of the signature at all, which allows remote attackers to spoof arbitrary email signatures by crafting a signed email with an invalid signature
Published May 16, 2019
5.9
MEDIUMCVSS 3.0
EPSS 1.73%
Description
The signature verification routine in the Airmail GPG-PGP Plugin, versions 1.0 (9) and earlier, does not verify the status of the signature at all, which allows remote attackers to spoof arbitrary email signatures by crafting a signed email with an invalid signature. Also, it does not verify the validity of the signing key, which allows remote attackers to spoof arbitrary email signatures by crafting a key with a fake user ID (email address) and injecting it into the user's keyring.
Affected products
No data.
- ≤ 1.0\(9\)
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.
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
AV:N/AC:M/Au:N/C:N/I:P/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 2, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Table of values (17 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 1.73% (0.01729) | 76.77th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.73% (0.01729) | 74.55th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.34% (0.00345) | 54.85th | v4 (v2025.03.14) |
| Jul 20, 2024 | 1.61% (0.01608) | 87.59th | v3 (v2023.03.01) |
| Jun 13, 2024 | 1.61% (0.01608) | 87.47th | v3 (v2023.03.01) |
| May 9, 2024 | 2.26% (0.02263) | 89.56th | v3 (v2023.03.01) |
| Oct 12, 2023 | 1.86% (0.01857) | 86.99th | v3 (v2023.03.01) |
| Sep 9, 2023 | 1.95% (0.01950) | 87.24th | v3 (v2023.03.01) |
| Sep 3, 2023 | 1.38% (0.01383) | 84.68th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.98% (0.00976) | 81.07th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.32% (0.01319) | 71.27th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.32% (0.01319) | 69.22th | v2 (v2022.01.01) |
| Feb 4, 2022 | 8.93% (0.08934) | 82.99th | v2 (v2022.01.01) |
| Feb 3, 2022 | 7.69% (0.07689) | 84.25th | v1 |
| Jan 6, 2022 | 7.69% (0.07689) | 84.10th | v1 |
| Jan 5, 2022 | 1.82% (0.01823) | 75.50th | v5 (v2026.06.15) |
| Apr 14, 2021 | 1.82% (0.01823) | 0.00th | v1 |
References (6)
- http://packetstormsecurity.com/files/152703/Johnny-You-Are-Fired.html x_refsource_MISCThird Party AdvisoryVDB Entry
- http://seclists.org/fulldisclosure/2019/Apr/38 mailing-listx_refsource_FULLDISCMailing ListThird Party Advisory
- https://github.com/Airmail/AirmailPlugIn-Framework/commits/master x_refsource_MISCPatchThird Party Advisory
- https://github.com/RUB-NDS/Johnny-You-Are-Fired x_refsource_MISCThird Party Advisory
- https://github.com/RUB-NDS/Johnny-You-Are-Fired/blob/master/paper/johnny-fired.pdf x_refsource_MISCThird Party Advisory
- https://www.openwall.com/lists/oss-security/2019/04/30/4 mailing-listx_refsource_MLISTMailing ListThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| http://packetstormsecurity.com/files/152703/Johnny-You-Are-Fired.html | x_refsource_MISCThird Party AdvisoryVDB Entry | |
| http://seclists.org/fulldisclosure/2019/Apr/38 | mailing-listx_refsource_FULLDISCMailing ListThird Party Advisory | |
| https://github.com/Airmail/AirmailPlugIn-Framework/commits/master | x_refsource_MISCPatchThird Party Advisory | |
| https://github.com/RUB-NDS/Johnny-You-Are-Fired | x_refsource_MISCThird Party Advisory | |
| https://github.com/RUB-NDS/Johnny-You-Are-Fired/blob/master/paper/johnny-fired.pdf | x_refsource_MISCThird Party Advisory | |
| https://www.openwall.com/lists/oss-security/2019/04/30/4 | mailing-listx_refsource_MLISTMailing ListThird Party Advisory |
Change history (0)
No recorded changes yet.