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Vulnerability Details CVE-2017-3859

A vulnerability in the DHCP code for the Zero Touch Provisioning feature of Cisco ASR 920 Series Aggregation Services Routers could allow an unauthenticated, remote attacker to cause an affected device to reload. The vulnerability is due to a format string vulnerability when processing a crafted DHCP packet for Zero Touch Provisioning. An attacker could exploit this vulnerability by sending a specially crafted DHCP packet to an affected device. An exploit could allow the attacker to cause the device to reload, resulting in a denial of service (DoS) condition. This vulnerability affects Cisco ASR 920 Series Aggregation Services Routers that are running an affected release of Cisco IOS XE Software (3.13 through 3.18) and are listening on the DHCP server port. By default, the devices do not listen on the DHCP server port. Cisco Bug IDs: CSCuy56385.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 56.3%
CVSS Severity
CVSS v3 Score 7.5
CVSS v2 Score 7.8
Products affected by CVE-2017-3859
  • Cisco » Asr-920-12cz-A » Version: N/A
    cpe:2.3:h:cisco:asr-920-12cz-a:-
  • Cisco » Asr-920-12cz-D » Version: N/A
    cpe:2.3:h:cisco:asr-920-12cz-d:-
  • Cisco » Asr-920-12sz-Im » Version: N/A
    cpe:2.3:h:cisco:asr-920-12sz-im:-
  • Cisco » Asr-920-24sz-Im » Version: N/A
    cpe:2.3:h:cisco:asr-920-24sz-im:-
  • Cisco » Asr-920-24sz-M » Version: N/A
    cpe:2.3:h:cisco:asr-920-24sz-m:-
  • Cisco » Asr-920-24tz-M » Version: N/A
    cpe:2.3:h:cisco:asr-920-24tz-m:-
  • Cisco » Asr-920-4sz-A » Version: N/A
    cpe:2.3:h:cisco:asr-920-4sz-a:-
  • Cisco » Asr-920-4sz-D » Version: N/A
    cpe:2.3:h:cisco:asr-920-4sz-d:-
  • Cisco » Ios Xe » Version: 3.13.4s
    cpe:2.3:o:cisco:ios_xe:3.13.4s
  • Cisco » Ios Xe » Version: 3.13.5as
    cpe:2.3:o:cisco:ios_xe:3.13.5as
  • Cisco » Ios Xe » Version: 3.13.5s
    cpe:2.3:o:cisco:ios_xe:3.13.5s
  • Cisco » Ios Xe » Version: 3.13.6as
    cpe:2.3:o:cisco:ios_xe:3.13.6as
  • Cisco » Ios Xe » Version: 3.13.6s
    cpe:2.3:o:cisco:ios_xe:3.13.6s
  • Cisco » Ios Xe » Version: 3.14.3s
    cpe:2.3:o:cisco:ios_xe:3.14.3s
  • Cisco » Ios Xe » Version: 3.14.4s
    cpe:2.3:o:cisco:ios_xe:3.14.4s
  • Cisco » Ios Xe » Version: 3.15.2s
    cpe:2.3:o:cisco:ios_xe:3.15.2s
  • Cisco » Ios Xe » Version: 3.15.3s
    cpe:2.3:o:cisco:ios_xe:3.15.3s
  • Cisco » Ios Xe » Version: 3.15.4s
    cpe:2.3:o:cisco:ios_xe:3.15.4s
  • Cisco » Ios Xe » Version: 3.16.0cs
    cpe:2.3:o:cisco:ios_xe:3.16.0cs
  • Cisco » Ios Xe » Version: 3.16.0s
    cpe:2.3:o:cisco:ios_xe:3.16.0s
  • Cisco » Ios Xe » Version: 3.16.1as
    cpe:2.3:o:cisco:ios_xe:3.16.1as
  • Cisco » Ios Xe » Version: 3.16.1s
    cpe:2.3:o:cisco:ios_xe:3.16.1s
  • Cisco » Ios Xe » Version: 3.16.2as
    cpe:2.3:o:cisco:ios_xe:3.16.2as
  • Cisco » Ios Xe » Version: 3.16.2bs
    cpe:2.3:o:cisco:ios_xe:3.16.2bs
  • Cisco » Ios Xe » Version: 3.16.2s
    cpe:2.3:o:cisco:ios_xe:3.16.2s
  • Cisco » Ios Xe » Version: 3.16.3as
    cpe:2.3:o:cisco:ios_xe:3.16.3as
  • Cisco » Ios Xe » Version: 3.16.3s
    cpe:2.3:o:cisco:ios_xe:3.16.3s
  • Cisco » Ios Xe » Version: 3.17.0s
    cpe:2.3:o:cisco:ios_xe:3.17.0s
  • Cisco » Ios Xe » Version: 3.17.1as
    cpe:2.3:o:cisco:ios_xe:3.17.1as
  • Cisco » Ios Xe » Version: 3.17.1s
    cpe:2.3:o:cisco:ios_xe:3.17.1s
  • Cisco » Ios Xe » Version: 3.17.2s
    cpe:2.3:o:cisco:ios_xe:3.17.2s
  • Cisco » Ios Xe » Version: 3.18.0as
    cpe:2.3:o:cisco:ios_xe:3.18.0as
  • Cisco » Ios Xe » Version: 3.18.0s
    cpe:2.3:o:cisco:ios_xe:3.18.0s
  • Cisco » Ios Xe » Version: 3.18.0sp
    cpe:2.3:o:cisco:ios_xe:3.18.0sp
  • Cisco » Ios Xe » Version: 3.18.1asp
    cpe:2.3:o:cisco:ios_xe:3.18.1asp
  • Cisco » Ios Xe » Version: 3.18.1bsp
    cpe:2.3:o:cisco:ios_xe:3.18.1bsp
  • Cisco » Ios Xe » Version: 3.18.1csp
    cpe:2.3:o:cisco:ios_xe:3.18.1csp
  • Cisco » Ios Xe » Version: 3.18.1s
    cpe:2.3:o:cisco:ios_xe:3.18.1s
  • Cisco » Ios Xe » Version: 3.18.1sp
    cpe:2.3:o:cisco:ios_xe:3.18.1sp
  • Cisco » Ios Xe » Version: 3.18.2s
    cpe:2.3:o:cisco:ios_xe:3.18.2s
  • Cisco » Ios Xe » Version: 3.18.3vs
    cpe:2.3:o:cisco:ios_xe:3.18.3vs


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