CVE-2018-19052 Path traversal in n/a

What is CVE-2018-19052?

CVE-2018-19052 is a high-severity path traversal vulnerability in Debian Debian Linux, published on 7 Nov 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An issue was discovered in mod_alias_physical_handler in mod_alias.c in lighttpd before 1.4.50. There is potential ../ path traversal of a single 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.

Weakness: CWE-22

Which versions are affected by CVE-2018-19052?

It affects 5 products.

Products include Debian Debian Linux, Lighttpd Lighttpd, Opensuse Backports Sle, Opensuse Leap, Suse Suse Linux Enterprise Server.

How do I fix CVE-2018-19052?

Upgrade to a fixed version.

Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.

Is CVE-2018-19052 being exploited?

There is no known exploitation of CVE-2018-19052 in the wild and no public exploit code.

Public exploit code: 1 proofs of concept on GitHub.

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• CVE-2025-39682 Linux Kernel Improper Check for Unusual or Exceptional Conditions Exploited Critical 9.8
• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2018-19052, DLA-2887-1, GHSA-f959-jhqc-rqpv, UBUNTU-CVE-2018-19052, openSUSE-SU-2019:2347-1.