CVE-2017-7787

Publication date 10 August 2017

Last updated 25 August 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

7.5 · High

Score breakdown

Description

Same-origin policy protections can be bypassed on pages with embedded iframes during page reloads, allowing the iframes to access content on the top level page, leading to information disclosure. This vulnerability affects Thunderbird < 52.3, Firefox ESR < 52.3, and Firefox < 55.

Read the notes from the security team

Status

Package Ubuntu Release Status
firefox 19.04 disco
Fixed in 55.0.2+build1-0ubuntu4
18.10 cosmic
Fixed in 55.0.2+build1-0ubuntu4
18.04 LTS bionic
Fixed in 55.0.2+build1-0ubuntu4
17.10 artful
Fixed in 55.0.2+build1-0ubuntu4
17.04 zesty
Fixed in 55.0.1+build2-0ubuntu0.17.04.2
16.04 LTS xenial
Fixed in 55.0.1+build2-0ubuntu0.16.04.2
14.04 LTS trusty
Fixed in 55.0.1+build2-0ubuntu0.14.04.2
mozjs38 19.04 disco Not in release
18.10 cosmic Not in release
18.04 LTS bionic
Not affected
17.10 artful Ignored end of life
17.04 zesty Ignored end of life
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
thunderbird 19.04 disco
Fixed in 1:52.4.0+build1-0ubuntu2
18.10 cosmic
Fixed in 1:52.4.0+build1-0ubuntu2
18.04 LTS bionic
Fixed in 1:52.4.0+build1-0ubuntu2
17.10 artful
Fixed in 1:52.4.0+build1-0ubuntu2
17.04 zesty
Fixed in 1:52.3.0+build1-0ubuntu0.17.04.1
16.04 LTS xenial
Fixed in 1:52.3.0+build1-0ubuntu0.16.04.1
14.04 LTS trusty
Fixed in 1:52.3.0+build1-0ubuntu0.14.04.1

Notes

tyhicks

mozjs38 contains a copy of the SpiderMonkey JavaScript engine

Severity score breakdown

CVSS version: CVSS v3.0

Base score 7.5 · High

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References

Related Ubuntu Security Notices (USN)

    • USN-3391-1
    • Firefox vulnerabilities
    • 15 August 2017
    • USN-3416-1
    • Thunderbird vulnerabilities
    • 14 September 2017

Other references

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