Multiple vulnerabilities in Mozilla Firefox and Firefox ESR

Description

Multiple serious vulnerabilities were found in Mozilla Firefox and Firefox ESR. Malicious users can exploit these vulnerabilities to execute arbitrary code, cause denial of service, bypass security restrictions.

Below is a complete list of vulnerabilities:

1. An use-after-free vulnerability in Skia can be exploited remotely via specially crafted website to execute arbitrary code;
2. An integer overflow vulnerability in Skia can be exploited remotely via specially crafted website to cause denial of service;
3. A cross-origin theft of images issue in ImageBitmapRenderingContext can be exploited to bypass security restrictions
4. A buffer overflow vulnerability in Skia can be exploited remotely via specially crafted website to cause denial of service;

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Technical details

Vulnerability (3) only affects Firefox 65.

Vulnerability (4) only affects Firefox ESR on macOS

Original advisories

• Mozilla Foundation Security Advisory 2019-04

• Mozilla Foundation Security Advisory 2019-05

Related products

• Mozilla-Firefox
• Mozilla-Firefox-ESR

CVE list

• CVE-2018-18335
  high
• CVE-2018-18356
  high
• CVE-2019-5785
  warning
• CVE-2018-18511
  warning

Read more

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