XXE in Apache Log4net
CVE-2018-1285
Apache log4net versions before 2.0.10 do not disable XML external entities when parsing log4net configuration files. This allows for XXE-based attacks in applications that accept attacker-controlled log4net configuration files.
Vulnerability class: XXE (XML External Entity)
EPSS: 0.178 (96.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Apache Log4net
- Netapp Manageability_software_development_kit
- Netapp Snapcenter
- Oracle Application_testing_suite — versions 13.3.0.1
- Oracle Hospitality_opera_5 — versions 5.5, 5.6
- Oracle Hospitality_simphony — versions 18.2.7.2, 19.1.3
- Fedoraproject Fedora — versions 30, 31, 32
- N/a Apache Log4net — versions Apache log4net up to 2.0.8
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security@apache.org (vendor-advisory, x_refsource_FEDORA)
- security@apache.org (vendor-advisory, x_refsource_FEDORA)
- security@apache.org (vendor-advisory, x_refsource_FEDORA)
- security@apache.org (mailing-list, x_refsource_MLIST)
- security@apache.org (mailing-list, x_refsource_MLIST)
- security@apache.org (mailing-list, x_refsource_MLIST)
- security@apache.org (mailing-list, x_refsource_MLIST)
- security@apache.org (mailing-list, x_refsource_MLIST)
- security@apache.org (mailing-list, x_refsource_MLIST)
- security@apache.org (mailing-list, x_refsource_MLIST)
Frequently asked questions
- What is CVE-2018-1285?
- CVE-2018-1285 is a critical-severity vulnerability in Apache Log4net, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 9.8/10. Published 2020-05-11.
- How severe is CVE-2018-1285?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2018-1285 known to be exploited?
- 11 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.