Apple iOS up to 8.4.0 Libc memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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6.6$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in Apple iOS up to 8.4.0. Affected by this issue is some unknown functionality of the component Libc. This manipulation causes memory corruption. This vulnerability is registered as CVE-2015-3796. Furthermore, an exploit is available. To fix this issue, it is recommended to deploy a patch.

Detailsinfo

A vulnerability was found in Apple iOS up to 8.4.0 (Smartphone Operating System). It has been declared as critical. Affected by this vulnerability is an unknown functionality of the component Libc. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was published 08/11/2015 by Ilja van Sprundel with Google Project Zero as HT205030 as confirmed advisory (Website). It is possible to read the advisory at support.apple.com. This vulnerability is known as CVE-2015-3796 since 05/07/2015. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are unknown but a public exploit is available.

A public exploit has been developed by Google Security Research and been published 2 months after the advisory. It is possible to download the exploit at exploit-db.com. It is declared as proof-of-concept. We expect the 0-day to have been worth approximately $100k and more. The vulnerability scanner Nessus provides a plugin with the ID 90315 (Apple TV < 7.2.1 Multiple Vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Misc.. The commercial vulnerability scanner Qualys is able to test this issue with plugin 276248 (Fedora Security Update for tregitc2f5d13 (FEDORA-2016-0a952a3bc0)).

Upgrading to version 8.4.1 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The best possible mitigation is suggested to be patching the affected component. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Exploit-DB (38263), Tenable (90315), SecurityFocus (BID 76343†) and SecurityTracker (ID 1033275†). Similar entries are available at VDB-77102, VDB-77103, VDB-77104 and VDB-77105. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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CVSSv4info

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CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 6.6

VulDB Base Score: 7.3
VulDB Temp Score: 6.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: Google Security Research
Download: 🔍

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Nessus ID: 90315
Nessus Name: Apple TV < 7.2.1 Multiple Vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 867773
OpenVAS Name: Fedora Update for tre FEDORA-2016-cd09eab674
OpenVAS File: 🔍
OpenVAS Family: 🔍

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Exploit-DB: 🔍

Threat Intelligenceinfo

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Countermeasuresinfo

Recommended: Patch
Status: 🔍

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Upgrade: iOS 8.4.1

Timelineinfo

05/07/2015 🔍
08/11/2015 +96 days 🔍
08/11/2015 +0 days 🔍
08/13/2015 +2 days 🔍
08/14/2015 +1 days 🔍
08/14/2015 +0 days 🔍
08/16/2015 +2 days 🔍
09/22/2015 +37 days 🔍
09/22/2015 +0 days 🔍
01/01/2025 +3389 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: HT205030
Researcher: Ilja van Sprundel
Organization: Google Project Zero
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2015-3796 (🔍)
GCVE (CVE): GCVE-0-2015-3796
GCVE (VulDB): GCVE-100-77155
SecurityFocus: 76343 - Apple Mac OS X and iOS Multiple Security Vulnerabilities
SecurityTracker: 1033275 - Apple iOS Multiple Flaws Let Remote Users Execute Arbitrary Code, Obtain Potentially Sensitive Information, and Deny Service and Let Apps Gain Elevated Privileges

scip Labs: https://www.scip.ch/en/?labs.20150917
See also: 🔍

Entryinfo

Created: 08/14/2015 12:48
Updated: 01/01/2025 12:31
Changes: 08/14/2015 12:48 (61), 10/09/2017 09:48 (23), 06/10/2022 02:11 (3), 06/10/2022 02:18 (1), 01/01/2025 12:31 (14)
Complete: 🔍
Cache ID: 216::103

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