CVE-2006-4434
Use-after-free vulnerability in Sendmail before 8.13.8 allows remote attackers to cause a denial of service (crash) via a long "header…
- 7.5HighCVSS base score
- 4.5%Exploitation in 30 daysEPSS · top 8.3% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
Use-after-free vulnerability in Sendmail before 8.13.8 allows remote attackers to cause a denial of service (crash) via a long "header line", which causes a previously freed variable to be referenced. NOTE: the original developer has disputed the severity of this issue, saying "The only denial of service that is possible here is to fill up the disk with core dumps if the OS actually generates different core dumps (which is unlikely)... the bug is in the shutdown code (finis()) which leads directly to exit(3), i.e., the process would terminate anyway, no mail delivery or receiption is affected."
Timeline
ID reserved
By mitre
- 1 day later
· 1 day later
Published
- 18 years later
· 18 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 4.5% · top 8.3% of all CVEs (12 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Affected products
n/a
- affected n/a
References
References19
- [3.9] 20060825 005: SECURITY FIX: August 25, 2006 (opens in a new tab)vendor-advisoryx_refsource_OPENBSDx_transferred
- 20060829 Sendmail vendor dispute - CVE-2006-4434 (fwd) (opens in a new tab)mailing-listx_refsource_VIMx_transferred
- 1016753 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- 21637 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- ADV-2006-3994 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
- 28193 (opens in a new tab)vdb-entryx_refsource_OSVDBx_transferred
- 21749 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- 21700 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- DSA-1164 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- 21641 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- http://www.sendmail.org/releases/8.13.8.html (opens in a new tab)x_refsource_CONFIRMx_transferred
- ADV-2006-3393 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
- MDKSA-2006:156 (opens in a new tab)vendor-advisoryx_refsource_MANDRIVAx_transferred
- 19714 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- SUSE-SR:2006:021 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- 102664 (opens in a new tab)vendor-advisoryx_refsource_SUNALERTx_transferred
- 22369 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- [3.8] 20060825 010: SECURITY FIX: August 25, 2006 (opens in a new tab)vendor-advisoryx_refsource_OPENBSDx_transferred
- 21696 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2006-4422 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2006-4434)Record last updated .