Remote code execution in Apple Safari

1) Use-after-free error

EUVDB-ID: #VU8119

Risk: High

CVSSv3.1: 8.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-7071

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The weakness exists due to use-after-free error when handling HTMLSlotElement objects. A remote attacker can trick the victim into visiting a specially crafted website or open a malicious file and execute arbitrary code on vulnerable installations of Apple Safari under the context of the current process.

Successful exploitation of the vulnerability may result in system compromise.

Mitigation

Update to version 10.1.

Vulnerable software versions

Apple Safari: 7.0 - 9.1.3

External links

http://www.zerodayinitiative.com/advisories/ZDI-17-714/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.