Medium severity · published Oct 24, 2023
CVE-2023-41339
Unsecured WMS dynamic styling sld=<url> parameter affords blind unauthenticated SSRF in GeoServer
5.3
CVSS
0.6%
EPSS
No
On KEV
Description
GeoServer is an open source software server written in Java that allows users to share and edit geospatial data. The WMS specification defines an ``sld=<url>`` parameter for GetMap, GetLegendGraphic and GetFeatureInfo operations for user supplied "dynamic styling". Enabling the use of dynamic styles, without also configuring URL checks, provides the opportunity for Service Side Request Forgery. This vulnerability can be used to steal user NetNTLMv2 hashes which could be relayed or cracked externally to gain further access. This vulnerability has been patched in versions 2.22.5 and 2.23.2.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 50% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GE
geoserver · geoserver
< 2.22.5; >= 2.23.0, < 2.23.2 · source: vendor, NVD, CISA
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-41339
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-41339
Release Notes
https://github.com/geoserver/geoserver/releases/tag/2.22.5
Release Notes
https://github.com/geoserver/geoserver/releases/tag/2.23.2
Mitigation
https://github.com/geoserver/geoserver/security/advisories/GHSA-cqpc-x2c6-2gmf
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