Path Traversal in Lighttpd
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.
Vulnerability class: Path Traversal (Directory Traversal)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.137 (96.4th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 96th percentile — 96.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.141 · newest: 0.137 · change: -0.004
Affected products
- Lighttpd
- Debian Linux — versions 9.0
- openSUSE Backports Sle — versions 15.0
- openSUSE Leap — versions 15.0, 15.1
- SUSE Linux Enterprise Server — versions 11, 12
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/lighttpd/lighttpd1.4/commit/2105dae0f9d7a964375ce681e53cb165375f84c1 (Exploit, Vendor Advisory)
- lists.opensuse.org/opensuse-security-announce/2019-10/msg00054.html (vendor-advisory, Mailing List, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2022/01/msg00012.html (mailing-list, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2018-19052?
- CVE-2018-19052 is a high-severity vulnerability in Lighttpd, classified under Path Traversal. CVSS score: 7.5/10. Published 2018-11-07.
- How severe is CVE-2018-19052?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2018-19052 known to be exploited?
- 7 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.