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TI-2017-02955 Aliases CVE-2017-3859GHSA-6xvc-57g8-cq77

A vulnerability in the DHCP code for the Zero Touch Provisioning feature of Cisco ASR 920…

Priority LOW 38CWE-134Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-134 and the CVSS impact.

Summary

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.

Why it matters now

EPSS 0.02479 84th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
—Cisco IOS XE Software for Cisco ASR 920 Series RoutersCisco IOS XE Software for Cisco ASR 920 Series Routers—No fix listedCNA
  • Cisco IOS XE Software for Cisco ASR 920 Series Routers Vendor— Affected Cisco IOS XE Software for Cisco ASR 920 Series Routers Fixed in — No fix listed CNA

CPE configurations NVD · 41

CPEVersionsRoleVendor
cpe:2.3:o:cisco:ios_xe:3.13.4s:*:*:*:*:*:*:*3.13.4sVulnerableCisco
cpe:2.3:o:cisco:ios_xe:3.13.5as:*:*:*:*:*:*:*3.13.5asVulnerableCisco
cpe:2.3:o:cisco:ios_xe:3.13.5s:*:*:*:*:*:*:*3.13.5sVulnerableCisco
cpe:2.3:o:cisco:ios_xe:3.13.6as:*:*:*:*:*:*:*3.13.6asVulnerableCisco
cpe:2.3:o:cisco:ios_xe:3.13.6s:*:*:*:*:*:*:*3.13.6sVulnerableCisco
cpe:2.3:o:cisco:ios_xe:3.14.3s:*:*:*:*:*:*:*3.14.3sVulnerableCisco
cpe:2.3:o:cisco:ios_xe:3.14.4s:*:*:*:*:*:*:*3.14.4sVulnerableCisco
cpe:2.3:o:cisco:ios_xe:3.15.2s:*:*:*:*:*:*:*3.15.2sVulnerableCisco
cpe:2.3:o:cisco:ios_xe:3.15.3s:*:*:*:*:*:*:*3.15.3sVulnerableCisco
cpe:2.3:o:cisco:ios_xe:3.15.4s:*:*:*:*:*:*:*3.15.4sVulnerableCisco
  • cpe:2.3:o:cisco:ios_xe:3.13.4s:*:*:*:*:*:*:* Versions 3.13.4s Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:3.13.5as:*:*:*:*:*:*:* Versions 3.13.5as Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:3.13.5s:*:*:*:*:*:*:* Versions 3.13.5s Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:3.13.6as:*:*:*:*:*:*:* Versions 3.13.6as Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:3.13.6s:*:*:*:*:*:*:* Versions 3.13.6s Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:3.14.3s:*:*:*:*:*:*:* Versions 3.14.3s Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:3.14.4s:*:*:*:*:*:*:* Versions 3.14.4s Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:3.15.2s:*:*:*:*:*:*:* Versions 3.15.2s Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:3.15.3s:*:*:*:*:*:*:* Versions 3.15.3s Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:3.15.4s:*:*:*:*:*:*:* Versions 3.15.4s Vulnerable ·Cisco
Show 31 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:cisco:ios_xe:3.16.0cs:*:*:*:*:*:*:*3.16.0csVulnerableCisco
cpe:2.3:o:cisco:ios_xe:3.16.0s:*:*:*:*:*:*:*3.16.0sVulnerableCisco
cpe:2.3:o:cisco:ios_xe:3.16.1as:*:*:*:*:*:*:*3.16.1asVulnerableCisco
cpe:2.3:o:cisco:ios_xe:3.16.1s:*:*:*:*:*:*:*3.16.1sVulnerableCisco
cpe:2.3:o:cisco:ios_xe:3.16.2as:*:*:*:*:*:*:*3.16.2asVulnerableCisco
cpe:2.3:o:cisco:ios_xe:3.16.2bs:*:*:*:*:*:*:*3.16.2bsVulnerableCisco
cpe:2.3:o:cisco:ios_xe:3.16.2s:*:*:*:*:*:*:*3.16.2sVulnerableCisco
cpe:2.3:o:cisco:ios_xe:3.16.3as:*:*:*:*:*:*:*3.16.3asVulnerableCisco
cpe:2.3:o:cisco:ios_xe:3.16.3s:*:*:*:*:*:*:*3.16.3sVulnerableCisco
cpe:2.3:o:cisco:ios_xe:3.17.0s:*:*:*:*:*:*:*3.17.0sVulnerableCisco
cpe:2.3:o:cisco:ios_xe:3.17.1as:*:*:*:*:*:*:*3.17.1asVulnerableCisco
cpe:2.3:o:cisco:ios_xe:3.17.1s:*:*:*:*:*:*:*3.17.1sVulnerableCisco
cpe:2.3:o:cisco:ios_xe:3.17.2s:*:*:*:*:*:*:*3.17.2sVulnerableCisco
cpe:2.3:o:cisco:ios_xe:3.18.0as:*:*:*:*:*:*:*3.18.0asVulnerableCisco
cpe:2.3:o:cisco:ios_xe:3.18.0s:*:*:*:*:*:*:*3.18.0sVulnerableCisco
cpe:2.3:o:cisco:ios_xe:3.18.0sp:*:*:*:*:*:*:*3.18.0spVulnerableCisco
cpe:2.3:o:cisco:ios_xe:3.18.1asp:*:*:*:*:*:*:*3.18.1aspVulnerableCisco
cpe:2.3:o:cisco:ios_xe:3.18.1bsp:*:*:*:*:*:*:*3.18.1bspVulnerableCisco
cpe:2.3:o:cisco:ios_xe:3.18.1csp:*:*:*:*:*:*:*3.18.1cspVulnerableCisco
cpe:2.3:o:cisco:ios_xe:3.18.1s:*:*:*:*:*:*:*3.18.1sVulnerableCisco
cpe:2.3:o:cisco:ios_xe:3.18.1sp:*:*:*:*:*:*:*3.18.1spVulnerableCisco
cpe:2.3:o:cisco:ios_xe:3.18.2s:*:*:*:*:*:*:*3.18.2sVulnerableCisco
cpe:2.3:o:cisco:ios_xe:3.18.3vs:*:*:*:*:*:*:*3.18.3vsVulnerableCisco
cpe:2.3:h:cisco:asr-920-12cz-a:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
cpe:2.3:h:cisco:asr-920-12cz-d:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
cpe:2.3:h:cisco:asr-920-12sz-im:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
cpe:2.3:h:cisco:asr-920-24sz-im:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
cpe:2.3:h:cisco:asr-920-24sz-m:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
cpe:2.3:h:cisco:asr-920-24tz-m:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
cpe:2.3:h:cisco:asr-920-4sz-a:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
cpe:2.3:h:cisco:asr-920-4sz-d:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
  • cpe:2.3:o:cisco:ios_xe:3.16.0cs:*:*:*:*:*:*:* Versions 3.16.0cs Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:3.16.0s:*:*:*:*:*:*:* Versions 3.16.0s Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:3.16.1as:*:*:*:*:*:*:* Versions 3.16.1as Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:3.16.1s:*:*:*:*:*:*:* Versions 3.16.1s Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:3.16.2as:*:*:*:*:*:*:* Versions 3.16.2as Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:3.16.2bs:*:*:*:*:*:*:* Versions 3.16.2bs Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:3.16.2s:*:*:*:*:*:*:* Versions 3.16.2s Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:3.16.3as:*:*:*:*:*:*:* Versions 3.16.3as Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:3.16.3s:*:*:*:*:*:*:* Versions 3.16.3s Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:3.17.0s:*:*:*:*:*:*:* Versions 3.17.0s Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:3.17.1as:*:*:*:*:*:*:* Versions 3.17.1as Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:3.17.1s:*:*:*:*:*:*:* Versions 3.17.1s Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:3.17.2s:*:*:*:*:*:*:* Versions 3.17.2s Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:3.18.0as:*:*:*:*:*:*:* Versions 3.18.0as Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:3.18.0s:*:*:*:*:*:*:* Versions 3.18.0s Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:3.18.0sp:*:*:*:*:*:*:* Versions 3.18.0sp Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:3.18.1asp:*:*:*:*:*:*:* Versions 3.18.1asp Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:3.18.1bsp:*:*:*:*:*:*:* Versions 3.18.1bsp Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:3.18.1csp:*:*:*:*:*:*:* Versions 3.18.1csp Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:3.18.1s:*:*:*:*:*:*:* Versions 3.18.1s Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:3.18.1sp:*:*:*:*:*:*:* Versions 3.18.1sp Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:3.18.2s:*:*:*:*:*:*:* Versions 3.18.2s Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe:3.18.3vs:*:*:*:*:*:*:* Versions 3.18.3vs Vulnerable ·Cisco
  • cpe:2.3:h:cisco:asr-920-12cz-a:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
  • cpe:2.3:h:cisco:asr-920-12cz-d:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
  • cpe:2.3:h:cisco:asr-920-12sz-im:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
  • cpe:2.3:h:cisco:asr-920-24sz-im:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
  • cpe:2.3:h:cisco:asr-920-24sz-m:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
  • cpe:2.3:h:cisco:asr-920-24tz-m:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
  • cpe:2.3:h:cisco:asr-920-4sz-a:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
  • cpe:2.3:h:cisco:asr-920-4sz-d:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2017-3859
  2. 2026-10-03 Alias added: GHSA-6xvc-57g8-cq77

References

Advisory 1

  • TI-2023-06904 Cisco is providing an update for the ongoing investigation into observed exploitation of… KEVCVSS 3.1CRITICAL 10.0
  • TI-2018-00122 Memory corruption in Cisco IOS and IOS XE KEVCVSS 3.1CRITICAL 9.8
  • TI-2017-02977 Improper input validation in Cisco IOS and IOS XE Software KEVCVSS 3.1CRITICAL 9.8
  • TI-2018-00135 Memory corruption in Cisco IOS, IOS XE, and IOS XR KEVCVSS 3.1HIGH 8.8
  • TI-2017-04498 Memory corruption in Cisco IOS KEVCVSS 3.1HIGH 8.8
  • TI-2017-04497 Memory corruption in Cisco IOS XE Software KEVCVSS 3.1HIGH 8.8
See all 561 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences