CVE-2005-0021 Memory corruption in n/a
Buffer overflows in Exim allow remote attackers to execute arbitrary code via crafted IPv6 addresses or DNS lookups.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2005-0021?
CVE-2005-0021 is a high-severity memory corruption vulnerability in n/a, published on 6 Jan 2005. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Multiple buffer overflows in Exim before 4.43 may allow attackers to execute arbitrary code via (1) an IPv6 address with more than 8 components, as demonstrated using the -be command line option, which triggers an overflow in the host_aton function, or (2) the -bh command line option or dnsdb PTR lookup, which triggers an overflow in the dns_build_reverse function.
Which versions are affected by CVE-2005-0021?
It affects 1 product.
Products include University of Cambridge Exim.
How do I fix CVE-2005-0021?
Upgrade to a fixed version.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2005-0021 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2005-0021 exists.
Public exploit code: 2 Exploit-DB entries.
Other vulnerabilities in n/a
Sources
Also known as DEBIAN-CVE-2005-0021, DSA-635-1, DSA-637-1, GHSA-4wq7-f94f-64w2.