Cross-site scripting in ViewVC browser interface



Published: 2020-04-03
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2020-5283
CWE-ID CWE-79
Exploitation vector Network
Public exploit N/A
Vulnerable software
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ViewVC
Web applications / Modules and components for CMS

Vendor ViewVC

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Cross-site scripting

EUVDB-ID: #VU26561

Risk: Low

CVSSv3.1: 4.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-5283

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Exploit availability: No

Description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data in CVS repository in "show_subdir_lastmod" support. A remote authenticated attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Mitigation

Install update from vendor's website.

Vulnerable software versions

ViewVC: 0.3.0 - 1.2.0

External links

http://github.com/viewvc/viewvc/commit/ad0f966e9a997b17d853a6972ea283d4dcd70fa8
http://github.com/viewvc/viewvc/issues/211
http://github.com/viewvc/viewvc/security/advisories/GHSA-xpxf-fvqv-7mfg


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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