Out-of-bounds read in Mozilla Firefox - CVE-2017-7753

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Main Vulnerability Database Vulnerabilities #VU7836

Out-of-bounds read in Mozilla Firefox - CVE-2017-7753

Published: August 14, 2017


Vulnerability identifier: #VU7836
CSH Severity: Low
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2017-7753
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to obtain potentially sensitive information on the target system.

The weakness exists due to out-of-bounds read when applying style rules to pseudo-elements, such as ::first-line, using cached style data. A remote attacker can trick the victim into visiting a specially crafted website, trigger memory corruption and read arbitrary files on the system.

Successful exploitation of the vulnerability results in information disclosure.

Affected software

Mozilla Firefox
Gentoo Linux
Debian Linux
Arch Linux
Red Hat Enterprise Linux for x86_64
SUSE Linux
Ubuntu
Opensuse
Mozilla Thunderbird

How to mitigate CVE-2017-7753

Update to version 55.0.


External References

Related Security Bulletins