Veille CVE
CVE-2018-0173
8.6 Élevée Exploitée activementCatalogue CISA KEV — Cisco IOS and IOS XE Software Improper Input Validation Vulnerability
Ajoutée le 03/03/2022 · Échéance de correction (agences US) : 17/03/2022
Action requise : Apply updates per vendor instructions.
Description
A vulnerability in the Cisco IOS Software and Cisco IOS XE Software function that restores encapsulated option 82 information in DHCP Version 4 (DHCPv4) packets could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a Relay Reply denial of service (DoS) condition. The vulnerability exists because the affected software performs incomplete input validation of encapsulated option 82 information that it receives in DHCPOFFER messages from DHCPv4 servers. An attacker could exploit this vulnerability by sending a crafted DHCPv4 packet to an affected device, which the device would then forward to a DHCPv4 server. When the affected software processes the option 82 information that is encapsulated in the response from the server, an error could occur. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition. Cisco Bug IDs: CSCvg62754.
Produits concernés
Scores CVSS
| Version | Score | Source | Vecteur |
|---|---|---|---|
| 3.1 | 8.6 Élevée | nvd@nist.gov (NVD) | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H |
| 3.1 | 8.6 Élevée | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H |
| 2.0 | 7.8 Élevée | nvd@nist.gov (NVD) | AV:N/AC:L/Au:N/C:N/I:N/A:C |
Faiblesses (CWE)
Références
- http://www.securityfocus.com/bid/103545 Broken LinkThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1040591 Broken LinkThird Party AdvisoryVDB Entry
- https://ics-cert.us-cert.gov/advisories/ICSA-18-107-04 Third Party AdvisoryUS Government Resource
- https://ics-cert.us-cert.gov/advisories/ICSA-18-107-05 Third Party AdvisoryUS Government Resource
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-dhcpr2 Vendor Advisory
- https://www.tenable.com/security/research/tra-2018-06 Third Party Advisory
- http://www.securityfocus.com/bid/103545 Broken LinkThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1040591 Broken LinkThird Party AdvisoryVDB Entry
- https://ics-cert.us-cert.gov/advisories/ICSA-18-107-04 Third Party AdvisoryUS Government Resource
- https://ics-cert.us-cert.gov/advisories/ICSA-18-107-05 Third Party AdvisoryUS Government Resource
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-dhcpr2 Vendor Advisory
- https://www.tenable.com/security/research/tra-2018-06 Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-0173 US Government Resource