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Digest · Monday

Security digest: October 16, 2023

1 editorial brief, 1 known exploited (cisa kev) addition and 4 critical advisories.

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Take stock

  • Act now: Cisco IOS XE Web UI Zero-Day Chain Implants Devices. Operators of Cisco IOS XE switches, routers and wireless controllers with `ip http server` or `ip http secure-server` enabled, especially where the web UI faces the internet.
  • Do you run any of these? Cisco IOS XE Web UI. They are being exploited in the wild (CISA KEV). Patch or mitigate if you do; CISA’s federal deadline is 2023-10-20.
  • Maven: 2 critical advisories (org.apache.inlong:manager-pojo, org.xwiki.contrib.changerequest:application-changerequest-ui). Check with mvn dependency:tree -Dincludes=<groupId>:<artifactId>.
  • Composer (PHP): 1 critical advisory (cachethq/cachet). Check with composer audit.
  • npm: 1 critical advisory (@babel/traverse, babel-traverse). Check with npm audit (or: npm ls <package>).
  • None of it touches your stack? Then there is nothing to do today. That is a result, not a failure to read carefully.

Editorial briefs

Act now

· Vulnerability · CVE-2023-20198, CVE-2023-20273

Cisco IOS XE Web UI Zero-Day Chain Implants Devices

If any IOS XE device has its HTTP or HTTPS server reachable from an untrusted network and is not on a fixed release, treat it as compromised until proven otherwise; devices with the web UI disabled were never exposed.

Must act: Operators of Cisco IOS XE switches, routers and wireless controllers with `ip http server` or `ip http secure-server` enabled, especially where the web UI faces the internet.

Can relax: Devices with the HTTP and HTTPS servers disabled, and Cisco ASA, FTD, ISE, IOS, NX-OS and IOS XE releases before 16, which Cisco confirmed are not affected.

  1. Run `show running-config | include ip http` on every IOS XE device to find web UI exposure.
  2. Where the web UI is not needed, apply `no ip http server` and `no ip http secure-server`, then `copy running-config startup-config`.
  3. Where it is needed, restrict it to trusted management networks with an access list (`ip http access-class ipv4 ...`).

Read the brief →

Known exploited (CISA KEV) 1

Added to CISA’s catalog on this day: confirmed exploitation in the wild. Due date = CISA’s deadline for US federal agencies.

CVEProduct and flawCISA due
CVE-2023-20198Cisco IOS XE Web UI
Cisco IOS XE Web UI Privilege Escalation Vulnerability		2023-10-20

Critical advisories by ecosystem 4

GitHub-reviewed advisories rated critical, published this day (Pacific time).

Maven 2

Check: mvn dependency:tree -Dincludes=<groupId>:<artifactId>

Composer (PHP) 1

Check: composer audit

npm 1

Check: npm audit (or: npm ls <package>)