HIGH
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
Published May 30, 2006
7.8
HIGHCVSS 2.0
EPSS 2.40%
Description
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.
Affected products
No data.
OR
- ≤ 0.44.2
- 0.37.3
- 0.38.1
- 0.40
- 0.43
- 0.43.1
- 0.43.2
- 0.44
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.
7.8 HIGH NVD
AV:N/AC:L/Au:N/C:N/I:N/A:C
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Complete
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
2.40% 0.02400
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
EPSS probability 0.02400
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 (13 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 2.40% (0.02400) | 83.45th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.35% (0.02355) | 81.47th | v5 (v2026.06.15) |
| Mar 17, 2025 | 2.86% (0.02863) | 85.34th | v4 (v2025.03.14) |
| Dec 12, 2024 | 8.57% (0.08565) | 94.75th | v3 (v2023.03.01) |
| Feb 3, 2024 | 8.57% (0.08565) | 93.91th | v3 (v2023.03.01) |
| Dec 10, 2023 | 6.42% (0.06423) | 92.93th | v3 (v2023.03.01) |
| Sep 3, 2023 | 7.60% (0.07599) | 93.29th | v3 (v2023.03.01) |
| May 11, 2023 | 8.57% (0.08565) | 93.49th | v3 (v2023.03.01) |
| Apr 3, 2023 | 3.85% (0.03853) | 90.52th | v3 (v2023.03.01) |
| Mar 7, 2023 | 3.51% (0.03511) | 90.09th | v3 (v2023.03.01) |
| Mar 6, 2023 | 2.69% (0.02686) | 82.85th | v2 (v2022.01.01) |
| Apr 1, 2022 | 2.69% (0.02686) | 81.17th | v2 (v2022.01.01) |
| Feb 4, 2022 | 2.69% (0.02686) | 62.66th | v2 (v2022.01.01) |
Weaknesses (0)
No CWE recorded.
References (13)
- http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=368834 x_refsource_CONFIRMPatch
- http://secunia.com/advisories/20519 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/20548 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/20792 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/21350 third-party-advisoryx_refsource_SECUNIA
- http://security.gentoo.org/glsa/glsa-200608-06.xml vendor-advisoryx_refsource_GENTOO
- http://securitytracker.com/id?1016248 vdb-entryx_refsource_SECTRACK
- http://www.courier-mta.org/beta/patches/verp-fix/README.txt x_refsource_CONFIRMPatch
- http://www.debian.org/security/2006/dsa-1101 vendor-advisoryx_refsource_DEBIAN
- http://www.securityfocus.com/bid/18345 vdb-entryx_refsource_BID
- http://www.vupen.com/english/advisories/2006/2214 vdb-entryx_refsource_VUPEN
- https://exchange.xforce.ibmcloud.com/vulnerabilities/26998 vdb-entryx_refsource_XF
- https://usn.ubuntu.com/294-1/ vendor-advisoryx_refsource_UBUNTU
| Link | Providers | Tags |
|---|---|---|
| http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=368834 | x_refsource_CONFIRMPatch | |
| http://secunia.com/advisories/20519 | third-party-advisoryx_refsource_SECUNIA | |
| http://secunia.com/advisories/20548 | third-party-advisoryx_refsource_SECUNIA | |
| http://secunia.com/advisories/20792 | third-party-advisoryx_refsource_SECUNIA | |
| http://secunia.com/advisories/21350 | third-party-advisoryx_refsource_SECUNIA | |
| http://security.gentoo.org/glsa/glsa-200608-06.xml | vendor-advisoryx_refsource_GENTOO | |
| http://securitytracker.com/id?1016248 | vdb-entryx_refsource_SECTRACK | |
| http://www.courier-mta.org/beta/patches/verp-fix/README.txt | x_refsource_CONFIRMPatch | |
| http://www.debian.org/security/2006/dsa-1101 | vendor-advisoryx_refsource_DEBIAN | |
| http://www.securityfocus.com/bid/18345 | vdb-entryx_refsource_BID | |
| http://www.vupen.com/english/advisories/2006/2214 | vdb-entryx_refsource_VUPEN | |
| https://exchange.xforce.ibmcloud.com/vulnerabilities/26998 | vdb-entryx_refsource_XF | |
| https://usn.ubuntu.com/294-1/ | vendor-advisoryx_refsource_UBUNTU |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published May 30, 2006
Updated Aug 7, 2024
Reserved May 30, 2006
Link CVE-2006-2659
CISA Vulnrichment
Updated n/a