Bug 671034 – www-servers/lighttpd: path traversal in mod_alias_physical_handler in mod_alias.c (CVE-2018-19052)

• Status: RESOLVED FIXED
• Product: Gentoo Security

[Description Marvin Wolf 2018-11-12 23:45:39 UTC]

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. 


References:
https://github.com/lighttpd/lighttpd1.4/commit/2105dae0f9d7a964375ce681e53cb165375f84c1

[Comment 1 GLSAMaker/CVETool Bot 2018-11-13 00:39:53 UTC]

CVE-2018-19052 (https://nvd.nist.gov/vuln/detail/CVE-2018-19052):
  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.

[Comment 2 Mikle Kolyada (RETIRED) 2018-11-24 10:56:52 UTC]

*** Bug 668828 has been marked as a duplicate of this bug. ***