CVE-2006-4434
What it is
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."
At a glance
- Exploitability
- Can be exploited over the network without logging in. High risk of service disruption.
- Exploit odds
- 4.5% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 4.5% in the next 30 days (EPSS).
- Severity: 7.5 HIGH (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 4.5% · EPSS, next 30 days
- Weakness
- CWE-416 · Use after free
- Record status
- Modified
Affected
- Sendmail < 8.13.8
Attack profile CVSS 3.1 · 7.5
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Raw vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2006-4434.md and follow it. Check whether this project is affected by CVE-2006-4434. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- http://secunia.com/advisories/21637
- http://secunia.com/advisories/21641
- http://secunia.com/advisories/21696
- http://secunia.com/advisories/21700
- http://secunia.com/advisories/21749
- http://secunia.com/advisories/22369
- http://securitytracker.com/id?1016753
- http://www.securityfocus.com/bid/19714
- http://www.vupen.com/english/advisories/2006/3393
- http://www.vupen.com/english/advisories/2006/3994
References
- http://secunia.com/advisories/21637
- http://secunia.com/advisories/21641
- http://secunia.com/advisories/21696
- http://secunia.com/advisories/21700
- http://secunia.com/advisories/21749
- http://secunia.com/advisories/22369
- http://securitytracker.com/id?1016753
- http://sunsolve.sun.com/search/document.do?assetkey=1-26-102664-1
- http://www.attrition.org/pipermail/vim/2006-August/000999.html
- http://www.debian.org/security/2006/dsa-1164
- http://www.mandriva.com/security/advisories?name=MDKSA-2006:156
- http://www.novell.com/linux/security/advisories/2006_21_sr.html
- http://www.openbsd.org/errata.html#sendmail3
- http://www.openbsd.org/errata38.html#sendmail3
- http://www.osvdb.org/28193
- http://www.securityfocus.com/bid/19714
- http://www.sendmail.org/releases/8.13.8.html
- http://www.vupen.com/english/advisories/2006/3393
- http://www.vupen.com/english/advisories/2006/3994
- http://secunia.com/advisories/21637
- http://secunia.com/advisories/21641
- http://secunia.com/advisories/21696
- http://secunia.com/advisories/21700
- http://secunia.com/advisories/21749
- http://secunia.com/advisories/22369