CVE-2017-7791: debian debian_linux Improper Input Validation
Vulnerability summary
CVE-2017-7791 is a medium (CVSS 5.3) Improper Input Validation vulnerability in debian debian_linux. EPSS estimates a 1.80% chance of exploitation in the next 30 days, higher than 78.1% of scored vulnerabilities. 1 public exploit is recorded.
Advisory lineage
Upstream 0 · Downstream 17 · Related 8Timeline
- 11-06-2018PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
On pages containing an iframe, the "data:" protocol can be used to create a modal alert that will render over arbitrary domains following page navigation, spoofing of the origin of the modal alert from the iframe content. This vulnerability affects Thunderbird < 52.3, Firefox ESR < 52.3, and Firefox < 55.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated5.3MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
- OSV · DebianEcosystem advisory · calculated5.3MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
EPSS trend
Probability
1.80%
Chance of exploitation in the next 30 days
Percentile
78%
Versus all other CVEs
30-day change
-0.04 pp
From 1.84% on 18-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (bugzilla.mozilla.org)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Redhat6 products
- enterprise_linuxEOL5.0 | 6.0 | 7.0
- enterprise_linux_desktop5.0 | 6.0 | 7.0
- enterprise_linux_server5.0 | 6.0 | 7.0
- enterprise_linux_server_aus7.3 | 7.4
- enterprise_linux_server_eus7.3 | 7.4 | 7.5
Mozilla3 products
- firefox≥ unspecified, < 55 | < 55.0 | < 52.3.0
- firefox_esr≥ unspecified, < 52.3
- thunderbird≥ unspecified, < 52.3 | < 52.3.0
Ubuntu3 products
- firefox< 55.0.1+build2-0ubuntu0.14.04.2 | < 55.0.1+build2-0ubuntu0.16.04.2
- mozjs38All versions (No fix recorded)
- thunderbird< 1:52.3.0+build1-0ubuntu0.14.04.1 | < 1:52.3.0+build1-0ubuntu0.16.04.1 | < 1:52.4.0+build1-0ubuntu2
Debian2 products
- firefox-esr< 52.3.0esr-1
- debian_linuxEOL8.0 | 9.0
4 vendors · 14 products
References
16 links- bugzilla.mozilla.org/show_bug.cgi?id=1365875X Refsource CONFIRMExploitIssue TrackingPatchVendor Advisory
