CVE-2017-6627

Cisco IOS and IOS XE Software: IOS Software and Cisco IOS XE Software UDP Packet Processing Denial-of-Service

As of , CVE-2017-6627 in Cisco IOS and IOS XE Software is on CISA's list of exploited vulnerabilities: CISA listed it on . Our patch-first group: Patch soon.

Exploited
Yes: CISA listed it on 3 March 2022
US federal deadline
24 March 202221 days after CISA listed it. US federal civilian agencies must fix it by then.
Used in ransomware campaigns
Not known to CISA
EPSS score
0.06Higher than 93% of the CVEs EPSS scores. EPSS estimates the chance of exploitation activity in the next 30 days.
EPSS when listed
0.01 on 3 March 2022EPSS on the day CISA listed it.
Public exploit
None foundNeither Metasploit nor Exploit-DB lists one.
Fix
No vendor link in CISA's entry

What CISA says to do

Apply updates per vendor instructions.

CISA's required action

What the flaw is

A vulnerability in the UDP processing code of Cisco IOS and IOS XE could allow an unauthenticated, remote attacker to cause the input queue of an affected system to hold UDP packets, causing an interface queue wedge and denial of service.

CISA's description

A vulnerability in the UDP processing code of Cisco IOS 15.1, 15.2, and 15.4 and IOS XE 3.14 through 3.18 could allow an unauthenticated, remote attacker to cause the input queue of an affected system to hold UDP packets, causing an interface queue wedge and a denial of service (DoS) condition. The vulnerability is due to Cisco IOS Software application changes that create UDP sockets and leave the sockets idle without closing them. An attacker could exploit this vulnerability by sending UDP packets with a destination port of 0 to an affected device. A successful exploit could allow the attacker to cause UDP packets to be held in the input interfaces queue, resulting in a DoS condition. The input interface queue will stop holding UDP packets when it receives 250 packets. Cisco Bug IDs: CSCup10024, CSCva55744, CSCva95506.

The CVE record's description, from cisco

CVE published
7 September 2017
Assigned by
cisco
CVSS
7.5 High (CVSS 3.1, from CISA-ADP)
CWE-399
Resource Management Errors
CISA SSVC, exploitation
active
CISA SSVC, automatable
yes
CISA SSVC, technical impact
partial

Timeline

  1. The CVE record was published.
  2. CISA added it to its list of exploited vulnerabilities.
  3. The US federal deadline to fix it.

IOS and IOS XE Software: other exploited entries

VulnerabilityProductOur groupListedDeadlineEPSS
CVE-2017-6736SNMP Remote Code ExecutionCisco IOS and IOS XE SoftwarePatch this weekEPSS 0.700.70
CVE-2017-6737SNMP Remote Code ExecutionCisco IOS and IOS XE SoftwarePatch soon0.45
CVE-2017-6742SNMP Remote Code ExecutionCisco IOS and IOS XE SoftwarePatch soon0.21
CVE-2017-12240DHCP Remote Code ExecutionCisco IOS and IOS XE SoftwarePatch soon0.14
CVE-2018-0151IOS Software and Cisco IOS XE Software Quality of Service Remote Code ExecutionCisco IOS and IOS XE SoftwarePatch soon0.14
CVE-2017-6738SNMP Remote Code ExecutionCisco IOS and IOS XE SoftwarePatch soon0.11
CVE-2017-6739SNMP Remote Code ExecutionCisco IOS and IOS XE SoftwarePatch soon0.11
CVE-2017-6740SNMP Remote Code ExecutionCisco IOS and IOS XE SoftwarePatch soon0.11
CVE-2017-6743SNMP Remote Code ExecutionCisco IOS and IOS XE SoftwarePatch soon0.11
CVE-2017-12237Internet Key Exchange Denial-of-ServiceCisco IOS and IOS XE SoftwarePatch soon0.07

All 14 entries for IOS and IOS XE Software

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