SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityModified

CVE-2017-5448

An out-of-bounds write in "ClearKeyDecryptor" while decrypting some Clearkey-encrypted media content.

HIGH 8.6EPSS 2.07%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (2.07%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

An out-of-bounds write in "ClearKeyDecryptor" while decrypting some Clearkey-encrypted media content. The "ClearKeyDecryptor" code runs within the Gecko Media Plugin (GMP) sandbox. If a second mechanism is found to escape the sandbox, this vulnerability allows for the writing of arbitrary data within memory, resulting in a potentially exploitable crash. This vulnerability affects Firefox ESR < 45.9, Firefox ESR < 52.1, and Firefox < 53.

CVSS 3.0
8.6 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
EPSS
2.07% probability · 80th percentile
CISA KEV
Not listed
Weakness
CWE-787
Affected
debian/debian linux · redhat/enterprise linux · redhat/enterprise linux desktop · redhat/enterprise linux server · redhat/enterprise linux server aus · redhat/enterprise linux server eus · redhat/enterprise linux workstation · mozilla/firefox
Source
security@mozilla.org

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.