The STARTTLS implementation in nnrpd in INN before 2.5.3 does not properly restrict I/O…
Priority LOW 36CWE-264Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Medium
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- Partial · Partial · Partial
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA. Impact type from CWE-264.
Summary
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.
Why it matters now
EPSS 0.03233 88th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 17
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:isc:inn:*:*:*:*:*:*:*:* | up to 2.5.2 | Vulnerable | ISC |
| cpe:2.3:a:isc:inn:1.4:*:*:*:*:*:*:* | 1.4 | Vulnerable | ISC |
| cpe:2.3:a:isc:inn:1.4sec:*:*:*:*:*:*:* | 1.4sec | Vulnerable | ISC |
| cpe:2.3:a:isc:inn:1.4sec2:*:*:*:*:*:*:* | 1.4sec2 | Vulnerable | ISC |
| cpe:2.3:a:isc:inn:1.4unoff3:*:*:*:*:*:*:* | 1.4unoff3 | Vulnerable | ISC |
| cpe:2.3:a:isc:inn:1.4unoff4:*:*:*:*:*:*:* | 1.4unoff4 | Vulnerable | ISC |
| cpe:2.3:a:isc:inn:1.5:*:*:*:*:*:*:* | 1.5 | Vulnerable | ISC |
| cpe:2.3:a:isc:inn:1.5.1:*:*:*:*:*:*:* | 1.5.1 | Vulnerable | ISC |
| cpe:2.3:a:isc:inn:1.7:*:*:*:*:*:*:* | 1.7 | Vulnerable | ISC |
| cpe:2.3:a:isc:inn:1.7.2:*:*:*:*:*:*:* | 1.7.2 | Vulnerable | ISC |
- cpe:2.3:a:isc:inn:*:*:*:*:*:*:*:* Versions up to 2.5.2 Vulnerable ·ISC
- cpe:2.3:a:isc:inn:1.4:*:*:*:*:*:*:* Versions 1.4 Vulnerable ·ISC
- cpe:2.3:a:isc:inn:1.4sec:*:*:*:*:*:*:* Versions 1.4sec Vulnerable ·ISC
- cpe:2.3:a:isc:inn:1.4sec2:*:*:*:*:*:*:* Versions 1.4sec2 Vulnerable ·ISC
- cpe:2.3:a:isc:inn:1.4unoff3:*:*:*:*:*:*:* Versions 1.4unoff3 Vulnerable ·ISC
- cpe:2.3:a:isc:inn:1.4unoff4:*:*:*:*:*:*:* Versions 1.4unoff4 Vulnerable ·ISC
- cpe:2.3:a:isc:inn:1.5:*:*:*:*:*:*:* Versions 1.5 Vulnerable ·ISC
- cpe:2.3:a:isc:inn:1.5.1:*:*:*:*:*:*:* Versions 1.5.1 Vulnerable ·ISC
- cpe:2.3:a:isc:inn:1.7:*:*:*:*:*:*:* Versions 1.7 Vulnerable ·ISC
- cpe:2.3:a:isc:inn:1.7.2:*:*:*:*:*:*:* Versions 1.7.2 Vulnerable ·ISC
Show 7 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:isc:inn:2.0:*:*:*:*:*:*:* | 2.0 | Vulnerable | ISC |
| cpe:2.3:a:isc:inn:2.1:*:*:*:*:*:*:* | 2.1 | Vulnerable | ISC |
| cpe:2.3:a:isc:inn:2.2:*:*:*:*:*:*:* | 2.2 | Vulnerable | ISC |
| cpe:2.3:a:isc:inn:2.2.1:*:*:*:*:*:*:* | 2.2.1 | Vulnerable | ISC |
| cpe:2.3:a:isc:inn:2.2.2:*:*:*:*:*:*:* | 2.2.2 | Vulnerable | ISC |
| cpe:2.3:a:isc:inn:2.2.3:*:*:*:*:*:*:* | 2.2.3 | Vulnerable | ISC |
| cpe:2.3:a:isc:inn:2.4.0:*:*:*:*:*:*:* | 2.4.0 | Vulnerable | ISC |
- cpe:2.3:a:isc:inn:2.0:*:*:*:*:*:*:* Versions 2.0 Vulnerable ·ISC
- cpe:2.3:a:isc:inn:2.1:*:*:*:*:*:*:* Versions 2.1 Vulnerable ·ISC
- cpe:2.3:a:isc:inn:2.2:*:*:*:*:*:*:* Versions 2.2 Vulnerable ·ISC
- cpe:2.3:a:isc:inn:2.2.1:*:*:*:*:*:*:* Versions 2.2.1 Vulnerable ·ISC
- cpe:2.3:a:isc:inn:2.2.2:*:*:*:*:*:*:* Versions 2.2.2 Vulnerable ·ISC
- cpe:2.3:a:isc:inn:2.2.3:*:*:*:*:*:*:* Versions 2.2.3 Vulnerable ·ISC
- cpe:2.3:a:isc:inn:2.4.0:*:*:*:*:*:*:* Versions 2.4.0 Vulnerable ·ISC
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
Not affected: 1 product
- Red Hat Enterprise Linux 5
Timeline
- 2026-10-02 Threatist record created from CVE-2012-3523
- 2026-10-03 Alias added: GHSA-g67q-3725-x6h7
References
Advisory 2
More ISC Inn vulnerabilities
- TI-1999-00042 Command execution via shell metachars in INN daemon (innd) 1.5 using "newgroup" and… CVSS 3.1CRITICAL 9.8
- TI-2002-00509 Format string vulnerabilities in (1) inews or (2) rnews for INN 2.2.3 and earlier allow… CVSS 2.0HIGH 10.0
- TI-1999-00704 The INN inndstart program allows local users to gain privileges by specifying an… CVSS 2.0HIGH 10.0
- TI-1999-00099 Remote access in AIX innd 1.5.1, using control messages. CVSS 2.0HIGH 10.0
- TI-2004-00034 Buffer overflow in the ARTpost function in art.c in the control message handling code for… CVSS 2.0HIGH 7.5
- TI-1999-00656 Buffer overflow in INN inews program. CVSS 2.0HIGH 7.5
Sources
- CVE-2012-3523 · CVE Program
- CVE-2012-3523 · NVD
- FIRST EPSS
- GHSA-g67q-3725-x6h7 · GitHub Advisory Database · CC BY 4.0
- CVE-2012-3523 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences