Apple iOS up to 4.x CFF Font Parser 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 described as critical has been identified in Apple iOS up to 4.x. This impacts an unknown function of the component CFF Font Parser. Executing a manipulation can lead to memory corruption. This vulnerability is handled as CVE-2010-1797. The attack can be executed remotely. Additionally, an exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Apple iOS up to 4.x (Smartphone Operating System). It has been declared as critical. This vulnerability affects an unknown code block of the component CFF Font Parser. 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. CVE summarizes:

Multiple stack-based buffer overflows in the cff_decoder_parse_charstrings function in the CFF Type2 CharStrings interpreter in cff/cffgload.c in FreeType before 2.4.2, as used in Apple iOS before 4.0.2 on the iPhone and iPod touch and before 3.2.2 on the iPad, allow remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via crafted CFF opcodes in embedded fonts in a PDF document, as demonstrated by JailbreakMe. NOTE: some of these details are obtained from third party information.

The weakness was released 08/03/2010 by comex with jailbreakme.com as HT4291 as confirmed advisory (Website). The advisory is shared for download at support.apple.com. This vulnerability was named CVE-2010-1797 since 05/06/2010. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are unknown but a public exploit is available.

It is possible to download the exploit at exploit-db.com. It is declared as proof-of-concept. As 0-day the estimated underground price was around $100k and more. The vulnerability scanner Nessus provides a plugin with the ID 68080 (Oracle Linux 3 / 4 / 5 : freetype (ELSA-2010-0607)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Oracle Linux Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 118377 (FreeType Compact Font Format (CFF) Multiple Stack Based Buffer Overflow Vulnerabilities).

Upgrading eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at support.apple.com. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published 2 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (60856), Tenable (68080), SecurityFocus (BID 42151†), OSVDB (67305†) and Secunia (SA40982†). Entries connected to this vulnerability are available at VDB-4157, VDB-54413, VDB-54412 and VDB-54410. Once again VulDB remains the best source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

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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VulDB Base Score: 🔍
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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
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 68080
Nessus Name: Oracle Linux 3 / 4 / 5 : freetype (ELSA-2010-0607)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 880406
OpenVAS Name: CentOS Update for freetype CESA-2010:0607 centos3 i386
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
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Patch: support.apple.com

Timelineinfo

05/06/2010 🔍
08/02/2010 +88 days 🔍
08/03/2010 +1 days 🔍
08/16/2010 +13 days 🔍
08/19/2010 +3 days 🔍
08/21/2010 +2 days 🔍
09/07/2010 +16 days 🔍
07/12/2013 +1039 days 🔍
09/26/2024 +4094 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: HT4291
Researcher: comex
Organization: jailbreakme.com
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2010-1797 (🔍)
GCVE (CVE): GCVE-0-2010-1797
GCVE (VulDB): GCVE-100-4156

OVAL: 🔍

X-Force: 60856
SecurityFocus: 42151 - Apple iOS for iPhone/iPad/iPod touch Privilege Escalation Vulnerability
Secunia: 40982 - Ubuntu update for freetype, Highly Critical
OSVDB: 67305 - FreeType base/ftobjs.c Mac_Read_POST_Resource Function Crafted LWFN Font Handling Overflow
Vupen: ADV-2010-2106

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

Entryinfo

Created: 08/19/2010 02:00
Updated: 09/26/2024 07:23
Changes: 08/19/2010 02:00 (82), 04/12/2019 14:27 (4), 03/18/2021 08:35 (1), 03/18/2021 08:39 (7), 03/18/2021 08:43 (1), 09/26/2024 07:23 (17)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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