CVE-2019-11703 Memory corruption in Thunderbird
A heap buffer overflow in Thunderbird's iCal parser allows attackers to cause a crash or potentially execute arbitrary code via crafted emails.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2019-11703?
CVE-2019-11703 is a critical memory corruption vulnerability in Mozilla Thunderbird, published on 23 Jul 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A flaw in Thunderbird's implementation of iCal causes a heap buffer overflow in parser_get_next_char when processing certain email messages, resulting in a potentially exploitable crash. This vulnerability affects Thunderbird < 60.7.1.
Weakness: CWE-787
Which versions are affected by CVE-2019-11703?
It affects 1 product.
Products include Mozilla Thunderbird.
How do I fix CVE-2019-11703?
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-2019-11703 being exploited?
There is no known exploitation of CVE-2019-11703 in the wild and no public exploit code.
Public exploit code: 1 Exploit-DB entry.
Other vulnerabilities in Mozilla Thunderbird
Sources
Also known as DEBIAN-CVE-2019-11703, GHSA-j937-8hgv-v466, UBUNTU-CVE-2019-11703.