Citrix Application Delivery Controller/Gateway 10.5/11.1/12.0/12.1/13.0 path traversal

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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8.2$0-$5k0.00

A vulnerability was found in Citrix Application Delivery Controller and Gateway 10.5/11.1/12.0/12.1/13.0 (Connectivity Software). It has been classified as very critical. Affected is some unknown processing. The manipulation with an unknown input leads to a path traversal vulnerability. CWE is classifying the issue as CWE-22. The software uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the software does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

An issue was discovered in Citrix Application Delivery Controller (ADC) and Gateway 10.5, 11.1, 12.0, 12.1, and 13.0. They allow Directory Traversal.

The weakness was shared 12/27/2019 (Website). The advisory is shared for download at support.citrix.com. This vulnerability is traded as CVE-2019-19781 since 12/13/2019. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are unknown but a public exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 01/20/2020). The MITRE ATT&CK project declares the attack technique as T1006. This vulnerability has a historic impact due to its background and reception.

A public exploit has been developed by Project Zero India in Bash and been published 3 weeks after the advisory. It is declared as highly functional. The exploit is shared for download at github.com. As 0-day the estimated underground price was around $25k-$100k.

Applying the patch Fix for Citrix ADC and Citrix Gateway is able to eliminate this problem. The bugfix is ready for download at citrix.com. A possible mitigation has been published 4 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Exploit-DB (47901).

Productinfo

Type

Vendor

Name

License

  • commercial

CPE 2.3info

CPE 2.2info

CVSSv3info

VulDB Meta Base Score: 8.5
VulDB Meta Temp Score: 8.4

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

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Path traversal
CWE: CWE-22
ATT&CK: T1006

Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Highly functional
Author: Project Zero India
Programming Language: 🔍
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Patch: Fix for Citrix ADC and Citrix Gateway

Timelineinfo

12/13/2019 🔍
12/27/2019 +14 days 🔍
12/27/2019 +0 days 🔍
01/11/2020 +15 days 🔍
01/20/2020 +9 days 🔍
01/20/2020 +0 days 🔍

Sourcesinfo

Vendor: citrix.com

Advisory: support.citrix.com
Status: Not defined

CVE: CVE-2019-19781 (🔍)
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 12/27/2019 06:05 PM
Updated: 01/20/2020 02:11 PM
Changes: 12/27/2019 06:05 PM (39), 01/13/2020 07:45 AM (7), 01/20/2020 02:10 PM (2), 01/20/2020 02:11 PM (20)
Complete: 🔍
Committer: misc

Discussion

misc (+1)
3 years ago
Additional exploit and scanner from TrustedSec: https://github.com/trustedsec/cve-2019-19781

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