Heap-based buffer overflow in smtp_in.c for Exim 3 (exim3) before 3.36 and Exim 4 (exim4) before 4.21 may allow remote attackers to execute arbitrary code via an invalid (1) HELO or (2) EHLO argument with a large number of spaces followed by a NULL character and a newline, which is not properly trimmed before the "(no argument given)" string is appended to the buffer
Published Sep 6, 2003
7.5
HIGHCVSS 2.0
EPSS 5.65%
Description
Heap-based buffer overflow in smtp_in.c for Exim 3 (exim3) before 3.36 and Exim 4 (exim4) before 4.21 may allow remote attackers to execute arbitrary code via an invalid (1) HELO or (2) EHLO argument with a large number of spaces followed by a NULL character and a newline, which is not properly trimmed before the "(no argument given)" string is appended to the buffer.
Affected products
No data.
- 3.0
- 3.3
- 3.3.1
- 3.3.2
- 3.11
- 3.12
- 3.13
- 3.14
- 3.15
- 3.16
- 3.17
- 3.18
- 3.19
- 3.20
- 3.21
- 3.22
- 3.30
- 3.31
- 3.32
- 3.33
- 3.34
- 3.35
- 3.36
- 4.10
- 4.20
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.
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/C:P/I:P/A:P
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
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (11 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 5.65% (0.05650) | 92.73th | v5 (v2026.06.15) |
| Jun 15, 2026 | 5.51% (0.05512) | 91.76th | v5 (v2026.06.15) |
| Mar 30, 2025 | 7.02% (0.07018) | 90.60th | v4 (v2025.03.14) |
| Mar 29, 2025 | 5.08% (0.05082) | 82.64th | v4 (v2025.03.14) |
| Mar 19, 2025 | 7.02% (0.07018) | 90.34th | v4 (v2025.03.14) |
| Mar 17, 2025 | 5.61% (0.05612) | 89.64th | v4 (v2025.03.14) |
| Dec 12, 2024 | 12.90% (0.12902) | 95.72th | v3 (v2023.03.01) |
| Mar 7, 2023 | 12.90% (0.12902) | 94.56th | v3 (v2023.03.01) |
| Mar 6, 2023 | 11.27% (0.11270) | 95.02th | v2 (v2022.01.01) |
| Apr 1, 2022 | 11.27% (0.11270) | 94.61th | v2 (v2022.01.01) |
| Feb 4, 2022 | 11.27% (0.11270) | 88.71th | v2 (v2022.01.01) |
No CWE recorded.
References (9)
- http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000735 vendor-advisoryx_refsource_CONECTIVA
- http://marc.info/?l=bugtraq&m=106252015820395&w=2 mailing-listx_refsource_BUGTRAQ
- http://marc.info/?l=vuln-dev&m=106264740820334&w=2 mailing-listx_refsource_VULN-DEV
- http://packages.debian.org/changelogs/pool/main/e/exim/exim_3.36-13/changelog x_refsource_CONFIRM
- http://packages.debian.org/changelogs/pool/main/e/exim4/exim4_4.34-10/changelog x_refsource_CONFIRM
- http://www.debian.org/security/2003/dsa-376 vendor-advisoryx_refsource_DEBIANPatchVendor Advisory
- http://www.exim.org/pipermail/exim-announce/2003q3/000094.html x_refsource_CONFIRM
- http://www.exim.org/pipermail/exim-users/Week-of-Mon-20030811/057720.html mailing-listx_refsource_MLIST
- http://www.exim.org/pipermail/exim-users/Week-of-Mon-20030811/057809.html mailing-listx_refsource_MLIST
| Link | Providers | Tags |
|---|---|---|
| http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000735 | vendor-advisoryx_refsource_CONECTIVA | |
| http://marc.info/?l=bugtraq&m=106252015820395&w=2 | mailing-listx_refsource_BUGTRAQ | |
| http://marc.info/?l=vuln-dev&m=106264740820334&w=2 | mailing-listx_refsource_VULN-DEV | |
| http://packages.debian.org/changelogs/pool/main/e/exim/exim_3.36-13/changelog | x_refsource_CONFIRM | |
| http://packages.debian.org/changelogs/pool/main/e/exim4/exim4_4.34-10/changelog | x_refsource_CONFIRM | |
| http://www.debian.org/security/2003/dsa-376 | vendor-advisoryx_refsource_DEBIANPatchVendor Advisory | |
| http://www.exim.org/pipermail/exim-announce/2003q3/000094.html | x_refsource_CONFIRM | |
| http://www.exim.org/pipermail/exim-users/Week-of-Mon-20030811/057720.html | mailing-listx_refsource_MLIST | |
| http://www.exim.org/pipermail/exim-users/Week-of-Mon-20030811/057809.html | mailing-listx_refsource_MLIST |
Change history (0)
No recorded changes yet.