libimobiledevice libplist 1.12 PLIST File bplist.c parse_unicode_node out-of-bounds write

CVSS Meta Temp Score
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CTI Interest Score
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5.8$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in libimobiledevice libplist 1.12. This vulnerability affects the function parse_unicode_node of the file bplist.c of the component PLIST File Handler. This manipulation causes out-of-bounds write. This vulnerability is tracked as CVE-2017-6438. The attack is restricted to local execution. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability has been found in libimobiledevice libplist 1.12 and classified as problematic. Affected by this vulnerability is the function parse_unicode_node of the file bplist.c of the component PLIST File Handler. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. The CWE definition for the vulnerability is CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Heap-based buffer overflow in the parse_unicode_node function in bplist.c in libimobiledevice libplist 1.12 allows local users to cause a denial of service (out-of-bounds write) and possibly code execution via a crafted plist file.

The bug was discovered 03/02/2017. The weakness was disclosed 03/15/2017 by zhunki (GitHub Repository). It is possible to read the advisory at github.com. This vulnerability is known as CVE-2017-6438 since 03/02/2017. Attacking locally is a requirement. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 13 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 100187 (Fedora 24 : libplist (2017-3849af4477)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 276634 (Fedora Security Update for libplist (FEDORA-2017-4047180cd3)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 3 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (100187) and SecurityFocus (BID 97281†). The entries VDB-95188, VDB-98164, VDB-98165 and VDB-98166 are pretty similar. Be aware that VulDB is the high quality 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: 6.6
VulDB Meta Temp Score: 6.2

VulDB Base Score: 5.9
VulDB Temp Score: 5.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.3
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Out-of-bounds write
CWE: CWE-787 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 100187
Nessus Name: Fedora 24 : libplist (2017-3849af4477)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 867773
OpenVAS Name: Fedora Update for libplist FEDORA-2017-4047180cd3
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Timelineinfo

03/02/2017 🔍
03/02/2017 +0 days 🔍
03/15/2017 +13 days 🔍
03/15/2017 +0 days 🔍
03/15/2017 +0 days 🔍
03/16/2017 +1 days 🔍
05/12/2017 +57 days 🔍
05/16/2017 +4 days 🔍
09/09/2020 +1212 days 🔍

Sourcesinfo

Product: github.com

Advisory: github.com
Researcher: zhunki
Status: Not defined

CVE: CVE-2017-6438 (🔍)
GCVE (CVE): GCVE-0-2017-6438
GCVE (VulDB): GCVE-100-98167
SecurityFocus: 97281 - libplist 'parse_unicode_node()' Function Local Heap Buffer Overflow Vulnerability
OSVDB: - CVE-2017-6438 - libplist - Out-of-Bounds Write Issue

See also: 🔍

Entryinfo

Created: 03/16/2017 11:15
Updated: 09/09/2020 09:57
Changes: 03/16/2017 11:15 (77), 09/09/2020 09:57 (7)
Complete: 🔍
Cache ID: 216:004:103

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