Path Traversal Vulnerability in Lighttpd Web Server
CVE-2018-19052

7.5HIGH

Key Information:

Vendor

Lighttpd

Status
Lighttpd
Vendor
CVE Published:
7 November 2018

Badges

👾 Exploit Exists🟡 Public PoC🟣 EPSS 49%

What is CVE-2018-19052?

A vulnerability in the mod_alias_physical_handler function within the lighttpd web server allows an attacker to exploit improper configuration. Specifically, if an alias configuration is set without a trailing '/' character, yet the filesystem path for the alias target includes a trailing '/', an attacker can traverse directories. This results in the potential exposure of sensitive files above the alias target, which could lead to unauthorized access to system data.

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Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

cve-2018-19052
Created by iveresk

References

https://github.com/lighttpd/lighttpd1.4/commit/2105dae0f9...
x_refsource_MISC
http://lists.opensuse.org/opensuse-security-announce/2019...
vendor-advisoryx_refsource_SUSE
https://lists.debian.org/debian-lts-announce/2022/01/msg0...
mailing-listx_refsource_MLIST

EPSS Score

49% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

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