CVE-2019-11705: mozilla thunderbird Out-of-bounds Write
Vulnerability summary
CVE-2019-11705 is a critical (CVSS 9.8) Out-of-bounds Write vulnerability in mozilla thunderbird. EPSS estimates a 9.90% chance of exploitation in the next 30 days, higher than 95.5% of scored vulnerabilities. 1 public exploit is recorded.
Advisory lineage
Upstream 0 · Downstream 13 · Related 7Timeline
- 23-07-2019PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
A flaw in Thunderbird's implementation of iCal causes a stack buffer overflow in icalrecur_add_bydayrules when processing certain email messages, resulting in a potentially exploitable crash. This vulnerability affects Thunderbird < 60.7.1.
CVSS metrics
5 scores · 3 sources · 3 versions- OSV · UbuntuEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
9.90%
Chance of exploitation in the next 30 days
Percentile
96%
Versus all other CVEs
30-day change
0.00 pp
From 9.90% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundThunderbird ESR < 60.7.XXX - 'icalrecur_add_bydayrules' Stack-Based Buffer Overflow
Maturity: poc
Weaknesses
CWE · root causeAffected systems
Debian1 product
- thunderbird< 1:60.7.1-1
Mozilla1 product
- thunderbird≥ unspecified, < 60.7.1 | < 60.7.1
Ubuntu1 product
- thunderbird< 1:60.7.1+build1-0ubuntu0.16.04.1 | < 1:60.7.1+build1-0ubuntu0.18.04.1
3 vendors · 3 products
References
9 links- bugzilla.mozilla.org/show_bug.cgi?id=1553808X Refsource MISCIssue TrackingPermissions RequiredVendor AdvisoryREPORT
