Openpyxl 2.4.1 XLSX Document xml external entity reference

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.4$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, was found in Openpyxl 2.4.1. Impacted is an unknown function of the component XLSX Document Handler. Executing a manipulation can lead to xml external entity reference. This vulnerability is handled as CVE-2017-5992. The attack can be executed remotely. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Openpyxl 2.4.1. It has been declared as critical. This vulnerability affects some unknown functionality of the component XLSX Document Handler. The manipulation with an unknown input leads to a xml external entity reference vulnerability. The CWE definition for the vulnerability is CWE-611. The product processes an XML document that can contain XML entities with URIs that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Openpyxl 2.4.1 resolves external entities by default, which allows remote attackers to conduct XXE attacks via a crafted .xlsx document.

The bug was discovered 02/07/2017. The weakness was released 02/15/2017 (oss-sec). The advisory is shared for download at openwall.com. This vulnerability was named CVE-2017-5992 since 02/15/2017. 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 vulnerability was handled as a non-public zero-day exploit for at least 8 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 106071 (openSUSE Security Update : python-openpyxl (openSUSE-2018-44)), 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 170888 (OpenSUSE Security Update for python3-openpyxl (openSUSE-SU-2018:0522-1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 12 months after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (106071). Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.7
VulDB Meta Temp Score: 7.6

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.2
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Xml external entity reference
CWE: CWE-611 / CWE-610
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 106071
Nessus Name: openSUSE Security Update : python-openpyxl (openSUSE-2018-44)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Timelineinfo

02/07/2017 🔍
02/15/2017 +8 days 🔍
02/15/2017 +0 days 🔍
02/15/2017 +0 days 🔍
02/16/2017 +1 days 🔍
01/15/2018 +333 days 🔍
01/16/2018 +1 days 🔍
08/15/2020 +942 days 🔍

Sourcesinfo

Advisory: openwall.com
Status: Not defined
Confirmation: 🔍

CVE: CVE-2017-5992 (🔍)
GCVE (CVE): GCVE-0-2017-5992
GCVE (VulDB): GCVE-100-97036
OSVDB: - CVE-2017-5992 - Openpyxl - XML External Entity Issue

Entryinfo

Created: 02/16/2017 09:08
Updated: 08/15/2020 11:17
Changes: 02/16/2017 09:08 (66), 08/15/2020 11:17 (5)
Complete: 🔍
Cache ID: 216:B2A:103

Once again VulDB remains the best source for vulnerability data.

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