CVE-2009-3942 Security feature bypass in n/a
Man-in-the-middle attackers can spoof SSL servers by exploiting null byte handling in certificate domain names when OpenSSL is used.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2009-3942?
CVE-2009-3942 is a medium-severity vulnerability in n/a, published on 16 Nov 2009. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Martin Lambers msmtp before 1.4.19, when OpenSSL is used, does not properly handle a '\0' character in a domain name in the (1) subject's Common Name or (2) Subject Alternative Name field of an X.509 certificate, which allows man-in-the-middle attackers to spoof arbitrary SSL servers via a crafted certificate issued by a legitimate Certification Authority, a related issue to CVE-2009-2408.
Weakness: CWE-310
Which versions are affected by CVE-2009-3942?
It affects 1 product.
Products include Martin Lambers Msmtp.
How do I fix CVE-2009-3942?
No fix has been published for CVE-2009-3942 yet. Limit exposure of the affected software until one is available.
Is CVE-2009-3942 being exploited?
There is no known exploitation of CVE-2009-3942 in the wild and no public exploit code.
Sources
Also known as GHSA-fq9p-mw8p-ccwj.