# CVE-2018-19052: lighttpd: An issue was discovered in mod_alias_physical_handler in mod_alias.c in lighttpd before 1.4.50

CVE-2018-19052 is fixed in 10 products on 1 platform, first by lighttpd 1.4.45-1ubuntu3.18.04.1+esm1, released November 6, 2018. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2018-19052
- Priority: Routine
- CVSS: n/a (Low)
- EPSS: 0.1371
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Nov 6, 2018

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | lighttpd Ubuntu 18.04.6 LTS (bionic) | 1.4.45-1ubuntu3.18.04.1+esm1 | [lighttpd 1.4.45-1ubuntu3.18.04.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-lighttpd-1.4.45-1ubuntu3.18.04.1-esm1.md) | Nov 6, 2018 |
| Linux | lighttpd-mod-authn-gssapi Ubuntu 18.04.6 LTS (bionic) | 1.4.45-1ubuntu3.18.04.1+esm1 | [lighttpd-mod-authn-gssapi 1.4.45-1ubuntu3.18.04.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-lighttpd-mod-authn-gssapi-1.4.45-1ubuntu3.18.04.1-esm1.md) | Nov 6, 2018 |
| Linux | lighttpd-mod-authn-ldap Ubuntu 18.04.6 LTS (bionic) | 1.4.45-1ubuntu3.18.04.1+esm1 | [lighttpd-mod-authn-ldap 1.4.45-1ubuntu3.18.04.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-lighttpd-mod-authn-ldap-1.4.45-1ubuntu3.18.04.1-esm1.md) | Nov 6, 2018 |
| Linux | lighttpd-mod-authn-mysql Ubuntu 18.04.6 LTS (bionic) | 1.4.45-1ubuntu3.18.04.1+esm1 | [lighttpd-mod-authn-mysql 1.4.45-1ubuntu3.18.04.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-lighttpd-mod-authn-mysql-1.4.45-1ubuntu3.18.04.1-esm1.md) | Nov 6, 2018 |
| Linux | lighttpd-mod-cml Ubuntu 18.04.6 LTS (bionic) | 1.4.45-1ubuntu3.18.04.1+esm1 | [lighttpd-mod-cml 1.4.45-1ubuntu3.18.04.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-lighttpd-mod-cml-1.4.45-1ubuntu3.18.04.1-esm1.md) | Nov 6, 2018 |
| Linux | lighttpd-mod-geoip Ubuntu 18.04.6 LTS (bionic) | 1.4.45-1ubuntu3.18.04.1+esm1 | [lighttpd-mod-geoip 1.4.45-1ubuntu3.18.04.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-lighttpd-mod-geoip-1.4.45-1ubuntu3.18.04.1-esm1.md) | Nov 6, 2018 |
| Linux | lighttpd-mod-magnet Ubuntu 18.04.6 LTS (bionic) | 1.4.45-1ubuntu3.18.04.1+esm1 | [lighttpd-mod-magnet 1.4.45-1ubuntu3.18.04.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-lighttpd-mod-magnet-1.4.45-1ubuntu3.18.04.1-esm1.md) | Nov 6, 2018 |
| Linux | lighttpd-mod-mysql-vhost Ubuntu 18.04.6 LTS (bionic) | 1.4.45-1ubuntu3.18.04.1+esm1 | [lighttpd-mod-mysql-vhost 1.4.45-1ubuntu3.18.04.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-lighttpd-mod-mysql-vhost-1.4.45-1ubuntu3.18.04.1-esm1.md) | Nov 6, 2018 |
| Linux | lighttpd-mod-trigger-b4-dl Ubuntu 18.04.6 LTS (bionic) | 1.4.45-1ubuntu3.18.04.1+esm1 | [lighttpd-mod-trigger-b4-dl 1.4.45-1ubuntu3.18.04.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-lighttpd-mod-trigger-b4-dl-1.4.45-1ubuntu3.18.04.1-esm1.md) | Nov 6, 2018 |
| Linux | lighttpd-mod-webdav Ubuntu 18.04.6 LTS (bionic) | 1.4.45-1ubuntu3.18.04.1+esm1 | [lighttpd-mod-webdav 1.4.45-1ubuntu3.18.04.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-lighttpd-mod-webdav-1.4.45-1ubuntu3.18.04.1-esm1.md) | Nov 6, 2018 |

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