CVE-2006-4434 Use after free in n/a
Remote attackers can cause a denial of service in Sendmail by triggering a use-after-free error via a long header line, though impact is disputed.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2006-4434?
CVE-2006-4434 is a high-severity use after free vulnerability in n/a, published on 29 Aug 2006. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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."
Weakness: CWE-416
Which versions are affected by CVE-2006-4434?
It affects 1 product.
Products include Sendmail Sendmail.
How do I fix CVE-2006-4434?
Upgrade to a fixed version.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2006-4434 being exploited?
There is no known exploitation of CVE-2006-4434 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as DEBIAN-CVE-2006-4434, DSA-1164, GHSA-535c-fwmj-7hhw.