libs/comverp.c in Courier MTA before 0.53.2 allows attackers to cause a denial of service…
Priority LOW 39Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · Complete
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA.
Summary
libs/comverp.c in Courier MTA before 0.53.2 allows attackers to cause a denial of service (CPU consumption) via unknown vectors involving usernames that contain the "=" (equals) character, which is not properly handled during encoding.
Why it matters now
EPSS 0.024 84th 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 · 8
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:double_precision_incorporated:courier_mta:*:*:*:*:*:*:*:* | up to 0.44.2 | Vulnerable | Double Precision Incorporated |
| cpe:2.3:a:double_precision_incorporated:courier_mta:0.37.3:*:*:*:*:*:*:* | 0.37.3 | Vulnerable | Double Precision Incorporated |
| cpe:2.3:a:double_precision_incorporated:courier_mta:0.38.1:*:*:*:*:*:*:* | 0.38.1 | Vulnerable | Double Precision Incorporated |
| cpe:2.3:a:double_precision_incorporated:courier_mta:0.40:*:*:*:*:*:*:* | 0.40 | Vulnerable | Double Precision Incorporated |
| cpe:2.3:a:double_precision_incorporated:courier_mta:0.43:*:*:*:*:*:*:* | 0.43 | Vulnerable | Double Precision Incorporated |
| cpe:2.3:a:double_precision_incorporated:courier_mta:0.43.1:*:*:*:*:*:*:* | 0.43.1 | Vulnerable | Double Precision Incorporated |
| cpe:2.3:a:double_precision_incorporated:courier_mta:0.43.2:*:*:*:*:*:*:* | 0.43.2 | Vulnerable | Double Precision Incorporated |
| cpe:2.3:a:double_precision_incorporated:courier_mta:0.44:*:*:*:*:*:*:* | 0.44 | Vulnerable | Double Precision Incorporated |
- cpe:2.3:a:double_precision_incorporated:courier_mta:*:*:*:*:*:*:*:* Versions up to 0.44.2 Vulnerable ·Double Precision Incorporated
- cpe:2.3:a:double_precision_incorporated:courier_mta:0.37.3:*:*:*:*:*:*:* Versions 0.37.3 Vulnerable ·Double Precision Incorporated
- cpe:2.3:a:double_precision_incorporated:courier_mta:0.38.1:*:*:*:*:*:*:* Versions 0.38.1 Vulnerable ·Double Precision Incorporated
- cpe:2.3:a:double_precision_incorporated:courier_mta:0.40:*:*:*:*:*:*:* Versions 0.40 Vulnerable ·Double Precision Incorporated
- cpe:2.3:a:double_precision_incorporated:courier_mta:0.43:*:*:*:*:*:*:* Versions 0.43 Vulnerable ·Double Precision Incorporated
- cpe:2.3:a:double_precision_incorporated:courier_mta:0.43.1:*:*:*:*:*:*:* Versions 0.43.1 Vulnerable ·Double Precision Incorporated
- cpe:2.3:a:double_precision_incorporated:courier_mta:0.43.2:*:*:*:*:*:*:* Versions 0.43.2 Vulnerable ·Double Precision Incorporated
- cpe:2.3:a:double_precision_incorporated:courier_mta:0.44:*:*:*:*:*:*:* Versions 0.44 Vulnerable ·Double Precision Incorporated
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2006-2659
- 2026-10-03 Alias added: GHSA-jf3h-hc4x-5q33
References
More Double Precision Incorporated Courier Mta vulnerabilities
- TI-2004-00194 Multiple buffer overflows in (1) iso2022jp.c or (2) shiftjis.c for Courier-IMAP before… CVSS 2.0HIGH 7.5
- TI-2003-00036 SQL injection vulnerability in the PostgreSQL auth module for courier 0.40 and earlier… CVSS 2.0HIGH 7.5
- TI-2002-00887 Double Precision Courier e-mail MTA allows remote attackers to cause a denial of service… CVSS 2.0MEDIUM 5.0
- TI-2002-01246 Courier sqwebmail before 0.40.0 does not quickly drop privileges after startup in certain… CVSS 2.0MEDIUM 4.6
Sources
- CVE-2006-2659 · CVE Program
- CVE-2006-2659 · NVD
- FIRST EPSS
- GHSA-jf3h-hc4x-5q33 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences