Multiple vulnerabilities in Apple iOS

Published: 2016-08-24 | Updated: 2017-02-21
Severity Critical
Patch available YES
Number of vulnerabilities 3
CVE ID CVE-2016-4657
CVE-2016-4656
CVE-2016-4655
CWE ID CWE-119
CWE-200
Exploitation vector Network
Public exploit Vulnerability #1 is being exploited in the wild.
Vulnerability #2 is being exploited in the wild.
Vulnerability #3 is being exploited in the wild.
Vulnerable software Apple iOS Subscribe
Apple Safari
MAC OS X
Vendor Apple Inc.

Security Advisory

1) Memory corruption

Severity: Critical

CVSSv3: 8.9 [CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:F/RL:O/RC:C] [PCI]

CVE-ID: CVE-2016-4657

CWE-ID: CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer

Description

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

The vulnerability exists due to boundary error in WebKit. A remote attacker can create a specially crafted Web site, trick the victim into visiting it, trigger memory corruption and execute arbitrary code with privileges of the current user.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Note: the vulnerability was being actively exploited.

Mitigation

Update to version 9.3.5.

Vulnerable software versions

Apple iOS: 9.3.0, 9.3.1, 9.3.2, 9.3.3, 9.3.4

Apple Safari: 9.1, 9.1.1, 9.1.2

CPE External links

https://support.apple.com/en-us/HT207107

Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, a fully functional exploit for this vulnerability is available.

2) Memory corruption

Severity: Medium

CVSSv3: 8.2 [CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:F/RL:O/RC:C] [PCI]

CVE-ID: CVE-2016-4656

CWE-ID: CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer

Description

The vulnerability allows a local attacker to gain elevated privileges on the target system.

The vulnerability exists due to a boundary error when processing a malicious application. A local attacker can run a specially crafted application, trigger memory corruption and execute arbitrary code with SYSTEM privileges.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Note: the vulnerability was being actively exploited.

Mitigation

Update Apple iOS to version 9.3.5.
Update MAC OS X to version 10.11.6.

Vulnerable software versions

Apple iOS: 9.3.0, 9.3.1, 9.3.2, 9.3.3, 9.3.4

MAC OS X: 10.10., 10.10.1, 10.10.2, 10.10.3, 10.10.4, 10.11, 10.11.1, 10.11.2, 10.11.3, 10.11.4, 10.11.5

CPE External links

https://support.apple.com/en-us/HT207107
https://support.apple.com/en-us/HT207130

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, a fully functional exploit for this vulnerability is available.

3) Information disclosure

Severity: Critical

CVSSv3: 8 [CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L/E:F/RL:O/RC:C] [PCI]

CVE-ID: CVE-2016-4655

CWE-ID: CWE-200 - Information Exposure

Description

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

The weakness exists due to improper input validation. A remote attacker can run a specially crafted application, bypass security restrictions and obtain portions of kernel memory.

Successful exploitation of the vulnerability results in information disclosure on the vulnerable system.

Note: the vulnerability was being actively exploited.


Mitigation

Update Apple iOS to version 9.3.5.
Update MAC OS X to version 10.11.6.

Vulnerable software versions

Apple iOS: 10.0.0, 10.0.0

MAC OS X: 10.10., 10.10.1, 10.10.2, 10.10.3, 10.10.4, 10.11, 10.11.1, 10.11.2, 10.11.3, 10.11.4, 10.11.5

CPE External links

https://support.apple.com/en-us/HT207107
https://support.apple.com/en-us/HT207130

Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, a fully functional exploit for this vulnerability is available.