Expat Document memory corruption

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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9.6$0-$5k0.00

A vulnerability has been found in Expat (affected version not known) and classified as very critical. This vulnerability affects some unknown functionality of the component Document Handler. 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:

Expat allows context-dependent attackers to cause a denial of service (crash) or possibly execute arbitrary code via a malformed input document, which triggers a buffer overflow.

The weakness was presented 05/26/2016 by Gustavo Grieco as Bug 1296102 as confirmed bug report (Bugzilla). The advisory is shared for download at bugzilla.redhat.com. This vulnerability was named CVE-2016-0718 since 12/16/2015. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 08/22/2022).

The vulnerability scanner Nessus provides a plugin with the ID 91259 (Ubuntu 12.04 LTS / 14.04 LTS / 15.10 / 16.04 LTS : expat vulnerability (USN-2983-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Ubuntu Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 168881 (OpenSuSE Security Update for expat (openSUSE-SU-2016:1441-1)).

Applying a patch is able to eliminate this problem. The bugfix is ready for download at bugzilla.redhat.com. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (91259). Additional details are provided at seclists.org.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
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CVSSv3info

VulDB Meta Base Score: 9.8
VulDB Meta Temp Score: 9.6

VulDB Base Score: 9.8
VulDB Temp Score: 9.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

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

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 91259
Nessus Name: Ubuntu 12.04 LTS / 14.04 LTS / 15.10 / 16.04 LTS : expat vulnerability (USN-2983-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 855576
OpenVAS Name: SuSE Update for expat openSUSE-SU-2016:1441-1 (expat)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: bugzilla.redhat.com

Timelineinfo

12/16/2015 🔍
05/18/2016 +154 days 🔍
05/19/2016 +1 days 🔍
05/20/2016 +1 days 🔍
05/26/2016 +6 days 🔍
05/26/2016 +0 days 🔍
05/27/2016 +1 days 🔍
08/22/2022 +2278 days 🔍

Sourcesinfo

Advisory: Bug 1296102
Researcher: Gustavo Grieco
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-0718 (🔍)
OVAL: 🔍

SecurityTracker: 1036348
SecurityFocus: 90729 - Expat CVE-2016-0718 Buffer Overflow Vulnerability

Misc.: 🔍

Entryinfo

Created: 05/27/2016 11:03
Updated: 08/22/2022 10:18
Changes: 05/27/2016 11:03 (67), 03/16/2019 21:12 (15), 08/22/2022 10:18 (3)
Complete: 🔍
Cache ID: 3:4ED:103

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