Buffer overflow in Mozilla Thunderbird
CVE-2019-11703
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.105 (95.7th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 96th percentile — 95.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.105 · newest: 0.105 · change: 0.000
Affected products
- Mozilla Thunderbird — versions unspecified
Weakness classification (CWE)
References
- www.mozilla.org/security/advisories/mfsa2019-17/ (Vendor Advisory)
- bugzilla.mozilla.org/show_bug.cgi (Exploit, Issue Tracking, Vendor Advisory)
- security.gentoo.org/glsa/201908-20 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2019-11703?
- CVE-2019-11703 is a critical-severity vulnerability in Mozilla Thunderbird, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2019-07-23.
- How severe is CVE-2019-11703?
- Critical severity. CVSS v3 base score is 9.8 out of 10.