msmtp SSL NULL prefix flaw
Published Nov 16, 2009
6.4
MEDIUMCVSS 2.0
EPSS 1.08%
Description
Martin Lambers msmtp before 1.4.19, when OpenSSL is used, does not properly handle a '\0' character in a domain name in the (1) subject's Common Name or (2) Subject Alternative Name field of an X.509 certificate, which allows man-in-the-middle attackers to spoof arbitrary SSL servers via a crafted certificate issued by a legitimate Certification Authority, a related issue to CVE-2009-2408.
Affected products
No data.
- ≤ 1.4.18
- 0.2.5
- 0.2.6
- 0.3.0
- 0.3.1
- 0.4.0
- 0.4.1
- 0.4.2
- 0.5.0
- 0.5.1
- 0.5.2
- 0.5.3
- 0.6.0
- 0.6.1
- 0.6.2
- 0.6.3
- 0.6.4
- 0.6.5
- 0.6.6
- 0.7.0
- 0.7.1
- 0.7.2
- 1.0.0
- 1.2.1
- 1.2.2
- 1.2.3
- 1.2.4
- 1.4.0
- 1.4.1
- 1.4.2
- 1.4.3
- 1.4.4
- 1.4.5
- 1.4.6
- 1.4.7
- 1.4.8
- 1.4.9
- 1.4.10
- 1.4.12
- 1.4.13
- 1.4.14
- 1.4.15
- 1.4.16
- 1.4.17
Running on/with
- 1.2.0
- 1.4.11
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:N/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 3, 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 (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 1.08% (0.01080) | 63.91th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.08% (0.01080) | 60.61th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.19% (0.00190) | 38.61th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.07% (0.00069) | 32.14th | v3 (v2023.03.01) |
| Jun 12, 2024 | 0.07% (0.00069) | 29.97th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.07% (0.00069) | 27.96th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.02% (0.01018) | 40.69th | v2 (v2022.01.01) |
| Sep 10, 2022 | 1.02% (0.01018) | 38.88th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.02% (0.01018) | 36.86th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.02% (0.01018) | 19.50th | v2 (v2022.01.01) |
References (8)
- http://lists.opensuse.org/opensuse-security-announce/2010-01/msg00007.html vendor-advisoryx_refsource_SUSE
- http://msmtp.sourceforge.net/news.html x_refsource_CONFIRM
- http://secunia.com/advisories/37321 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://www.vupen.com/english/advisories/2009/3224 vdb-entryx_refsource_VUPENVendor Advisory
- https://access.redhat.com/security/cve/CVE-2009-3942 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=537932 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2009-3942
- https://www.cve.org/CVERecord?id=CVE-2009-3942
| Link | Providers | Tags |
|---|---|---|
| http://lists.opensuse.org/opensuse-security-announce/2010-01/msg00007.html | vendor-advisoryx_refsource_SUSE | |
| http://msmtp.sourceforge.net/news.html | x_refsource_CONFIRM | |
| http://secunia.com/advisories/37321 | third-party-advisoryx_refsource_SECUNIAVendor Advisory | |
| http://www.vupen.com/english/advisories/2009/3224 | vdb-entryx_refsource_VUPENVendor Advisory | |
| https://access.redhat.com/security/cve/CVE-2009-3942 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=537932 | Issue Tracking | |
| https://nvd.nist.gov/vuln/detail/CVE-2009-3942 | ||
| https://www.cve.org/CVERecord?id=CVE-2009-3942 |
Change history (0)
No recorded changes yet.