Apache Sling up to 2.3.21 Sling.evalString cross site scripting

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.1	$0-$5k	0.64

Summaryinfo

A vulnerability categorized as problematic has been discovered in Apache Sling up to 2.3.21. The impacted element is the function Sling.evalString. The manipulation as part of String results in cross site scripting. This vulnerability was named CVE-2017-9802. The attack may be performed from remote. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Apache Sling up to 2.3.21. It has been classified as problematic. Affected is the function Sling.evalString. The manipulation as part of a String leads to a cross site scripting vulnerability. CWE is classifying the issue as CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. This is going to have an impact on integrity. CVE summarizes:

The Javascript method Sling.evalString() in Apache Sling Servlets Post before 2.3.22 uses the javascript 'eval' function to parse input strings, which allows for XSS attacks by passing specially crafted input strings.

The bug was discovered 08/14/2017. The weakness was presented 08/14/2017 (Website). The advisory is shared for download at lists.apache.org. This vulnerability is traded as CVE-2017-9802 since 06/21/2017. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1059.007.

The commercial vulnerability scanner Qualys is able to test this issue with plugin 11853 (Apache Sling Cross-Site-Scripting Vulnerability).

Upgrading to version 2.3.22 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 100284†). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

Apache

Name

Sling

Version

License

open-source

Website

Vendor: https://www.apache.org/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.2
VulDB Meta Temp Score: 5.1

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.1
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Cross site scripting
CWE: CWE-79 / CWE-94 / CWE-74
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
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Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Sling 2.3.22

Timelineinfo

06/21/2017 🔍
08/14/2017 +54 days 🔍
08/14/2017 +0 days 🔍
08/14/2017 +0 days 🔍
08/14/2017 +0 days 🔍
08/14/2017 +0 days 🔍
12/15/2022 +1949 days 🔍

Sourcesinfo

Vendor: apache.org

Advisory: 143758
Researcher: Dmitriev V.
Status: Not defined
Confirmation: 🔍

CVE: CVE-2017-9802 (🔍)
GCVE (CVE): GCVE-0-2017-9802
GCVE (VulDB): GCVE-100-105288
SecurityFocus: 100284 - Apache Sling Servlets Post CVE-2017-9802 Cross Site Scripting Vulnerability

Entryinfo

Created: 08/14/2017 18:44
Updated: 12/15/2022 17:08
Changes: 08/14/2017 18:44 (63), 11/06/2019 19:48 (3), 01/09/2021 12:20 (2), 12/15/2022 17:08 (3)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.