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 42%

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.

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

42% 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

.