SB2021031539 - Ubuntu update for lighttpd

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Main Vulnerability Database SB2021031539

SB2021031539 - Ubuntu update for lighttpd

Published: March 15, 2021 Updated: October 31, 2026

Security Bulletin ID SB2021031539
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 vulnerabilities.


1) Modification of Information (CVE-ID: CVE-2015-3200)

CWE-ID: CWE-284 - Improper Access Control

CVSSv4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a remote user to modify information on the target system.
The weakness exists due to access control flaw that allows a malicious user to obtain and modify data.
Successful exploitation of the vulnerability leads to modification of information on the vulnerable system.


2) Path traversal (CVE-ID: CVE-2018-19052)

CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

CVSSv4: 6.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to perform directory traversal attacks.

The vulnerability exists due to input validation error when processing directory traversal sequences. A remote attacker can send a specially crafted HTTP request and read arbitrary file located in a directory above an alias target, with a specific mod_alias configuration where the matched alias lacks a trailing '/' character, but the alias target filesystem path does have a trailing '/' character


Remediation

Install update from vendor's website.

References