(nnrpd): Prone to STARTTLS plaintext command injection
Published Nov 11, 2012
6.8
MEDIUMCVSS 2.0
EPSS 3.23%
Description
The STARTTLS implementation in nnrpd in INN before 2.5.3 does not properly restrict I/O buffering, which allows man-in-the-middle attackers to insert commands into encrypted sessions by sending a cleartext command that is processed after TLS is in place, related to a "plaintext command injection" attack, a similar issue to CVE-2011-0411.
Affected products
No data.
- ≤ 2.5.2
- 1.4
- 1.4sec
- 1.4sec2
- 1.4unoff3
- 1.4unoff4
- 1.5
- 1.5.1
- 1.7
- 1.7.2
- 2.0
- 2.1
- 2.2
- 2.2.1
- 2.2.2
- 2.2.3
- 2.4.0
No data.
Red Hat Enterprise Linux 5
inn
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | inn | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
Not vulnerable. This issue did not affect the versions of inn as shipped with Red Hat Enterprise Linux 5 as they did not include support for the STARTTLS command.
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:M/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 (12 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 3.23% (0.03233) | 87.83th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.23% (0.03233) | 86.60th | v5 (v2026.06.15) |
| Mar 30, 2025 | 18.81% (0.18812) | 94.79th | v4 (v2025.03.14) |
| Mar 29, 2025 | 23.74% (0.23737) | 93.58th | v4 (v2025.03.14) |
| Mar 19, 2025 | 17.96% (0.17965) | 94.41th | v4 (v2025.03.14) |
| Mar 17, 2025 | 19.94% (0.19940) | 95.00th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.21% (0.00209) | 59.77th | v3 (v2023.03.01) |
| Dec 6, 2023 | 0.21% (0.00209) | 58.62th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.22% (0.00220) | 58.35th | v3 (v2023.03.01) |
| Mar 6, 2023 | 2.21% (0.02211) | 81.20th | v2 (v2022.01.01) |
| Apr 1, 2022 | 2.21% (0.02211) | 79.41th | v2 (v2022.01.01) |
| Feb 4, 2022 | 2.21% (0.02211) | 58.05th | v2 (v2022.01.01) |
References (7)
- http://lists.opensuse.org/opensuse-updates/2012-09/msg00058.html vendor-advisoryx_refsource_SUSE
- http://secunia.com/advisories/50661 third-party-advisoryx_refsource_SECUNIA
- http://www.mandriva.com/security/advisories?name=MDVSA-2012:156 vendor-advisoryx_refsource_MANDRIVA
- https://access.redhat.com/security/cve/CVE-2012-3523 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=850478 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2012-3523
- https://www.cve.org/CVERecord?id=CVE-2012-3523
| Link | Providers | Tags |
|---|---|---|
| http://lists.opensuse.org/opensuse-updates/2012-09/msg00058.html | vendor-advisoryx_refsource_SUSE | |
| http://secunia.com/advisories/50661 | third-party-advisoryx_refsource_SECUNIA | |
| http://www.mandriva.com/security/advisories?name=MDVSA-2012:156 | vendor-advisoryx_refsource_MANDRIVA | |
| https://access.redhat.com/security/cve/CVE-2012-3523 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=850478 | Issue Tracking | |
| https://nvd.nist.gov/vuln/detail/CVE-2012-3523 | ||
| https://www.cve.org/CVERecord?id=CVE-2012-3523 |
Change history (0)
No recorded changes yet.