Apple iOS up to 10.3.3 zlib numeric error

CVSS Meta Temp Score
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CTI Interest Score
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8.6$5k-$25k0.00

Summaryinfo

A vulnerability marked as very critical has been reported in Apple iOS up to 10.3.3. This vulnerability affects unknown code of the component zlib. Performing a manipulation results in numeric error. This vulnerability is identified as CVE-2016-9840. The attack can be initiated remotely. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as very critical has been found in Apple iOS up to 10.3.3 (Smartphone Operating System). This affects an unknown code of the component zlib. The manipulation with an unknown input leads to a numeric error vulnerability. CWE is classifying the issue as CWE-189. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

inftrees.c in zlib 1.2.8 might allow context-dependent attackers to have unspecified impact by leveraging improper pointer arithmetic.

The bug was discovered 12/05/2016. The weakness was released 09/25/2017 as HT208112 as confirmed advisory (Website). The advisory is shared at support.apple.com. This vulnerability is uniquely identified as CVE-2016-9840 since 12/05/2016. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 03/28/2025). It is expected to see the exploit prices for this product increasing in the near future. The advisory points out:

Multiple issues were addressed by updating to version 1.2.11.

The vulnerability was handled as a non-public zero-day exploit for at least 169 days. During that time the estimated underground price was around $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 100378 (SUSE SLES11 Security Update : java-1_7_1-ibm (SUSE-SU-2017:1387-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 371397 (IBM Cognos Business Intelligence Multiple Security Vulnerabilities(swg22014202)).

Upgrading to version 11 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (100378) and SecurityFocus (BID 102803†). Entries connected to this vulnerability are available at VDB-21337, VDB-63776, VDB-90671 and VDB-96545. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.8
VulDB Meta Temp Score: 8.6

VulDB Base Score: 8.8
VulDB Temp Score: 8.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.8
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Numeric error
CWE: CWE-189
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 100378
Nessus Name: SUSE SLES11 Security Update : java-1_7_1-ibm (SUSE-SU-2017:1387-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 801105
OpenVAS Name: Apple Mac OS X Multiple Vulnerabilities-HT208144
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: iOS 11
Patch: github.com

Timelineinfo

12/05/2016 🔍
12/05/2016 +0 days 🔍
05/23/2017 +169 days 🔍
05/24/2017 +1 days 🔍
09/25/2017 +124 days 🔍
09/25/2017 +0 days 🔍
10/23/2017 +28 days 🔍
01/17/2018 +85 days 🔍
03/28/2025 +2627 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: HT208112
Researcher: Jeriko One
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-9840 (🔍)
GCVE (CVE): GCVE-0-2016-9840
GCVE (VulDB): GCVE-100-108441

OVAL: 🔍

SecurityFocus: 102803
SecurityTracker: 1039427

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

Entryinfo

Created: 10/23/2017 11:27
Updated: 03/28/2025 19:02
Changes: 10/23/2017 11:27 (68), 11/29/2019 13:22 (14), 01/19/2021 19:23 (2), 01/19/2021 19:28 (3), 01/04/2023 11:36 (3), 03/28/2025 19:02 (15)
Complete: 🔍
Cache ID: 216:108:103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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