CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
5.5 | $0-$5k | 0.00 |
A vulnerability classified as critical was found in Microsoft Excel (Spreadsheet Software) (the affected version unknown). This vulnerability affects an unknown part of the component XML Import 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.
The weakness was published 11/30/2019 by John Page (hyp3rlinx) (Website). The advisory is shared for download at hyp3rlinx.altervista.org. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. Technical details are unknown but a public exploit is available.
A public exploit has been developed by John Page (hyp3rlinx) and been published immediately after the advisory. It is possible to download the exploit at hyp3rlinx.altervista.org. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 204 days. During that time the estimated underground price was around $5k-$25k.
There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.
Product
Type
Vendor
Name
License
CPE 2.3
CPE 2.2
CVSSv4
VulDB CVSS-B Score: 🔍VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv3
VulDB Meta Base Score: 6.3VulDB Meta Temp Score: 5.5
VulDB Base Score: 6.3
VulDB Temp Score: 5.5
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv2
AV | AC | Au | C | I | A |
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💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
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unlock | unlock | unlock | unlock | unlock | unlock |
unlock | unlock | unlock | unlock | unlock | unlock |
unlock | unlock | unlock | unlock | unlock | unlock |
VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍
Exploiting
Class: Xml external entity referenceCWE: CWE-611 / CWE-610
ATT&CK: Unknown
Local: No
Remote: Yes
Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: John Page (hyp3rlinx)
Download: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍
0-Day | unlock | unlock | unlock | unlock |
---|---|---|---|---|
Today | unlock | unlock | unlock | unlock |
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: no mitigation knownStatus: 🔍
0-Day Time: 🔍
Exploit Delay Time: 🔍
Timeline
05/10/2019 🔍11/30/2019 🔍
11/30/2019 🔍
12/08/2019 🔍
12/08/2019 🔍
Sources
Vendor: microsoft.comAdvisory: hyp3rlinx.altervista.org
Researcher: John Page (hyp3rlinx)
Status: Not defined
scip Labs: https://www.scip.ch/en/?labs.20161013
Entry
Created: 12/08/2019 13:54Updated: 12/08/2019 13:59
Changes: 12/08/2019 13:54 (45), 12/08/2019 13:59 (2)
Complete: 🔍
Submitter: hyp3rlinx, misc
Submit
Accepted
- Submit #126: Microsoft Excel 2016 v1901 Import Error XML External Entity Injection (by hyp3rlinx)
- Submit #127: Microsoft Excel 2016 v1901 Error Import Based XML External Entity Injection (by misc)
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