This Windows 10 update is breaking printers
Microsoft’s printing woes continue following PrintNightmare issue
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Microsofthas revealed that its recentJuly Patch Tuesdaysecurity release has had a serious effect on printing and scanning on some otherWindows 10devices.
“After installing updates released July 13, 2021 on domain controllers (DCs) in your environment,printers,scanners, andmultifunction devicesthat are not compliant with section 3.2.1 of RFC 4556 spec might fail to print when using smart card (PIV) authentication,“shared Microsoftas it listed the issues that plague the latestWindows 10release, version 21H1.
Microsoft explains that the issue only affects devices that support smart card authentication. Furthermore, it only manifests itself on devices that don’t support the Diffie–Hellman key or advertise support for triple DES (des-ede3-cbc) during the Kerberos Authentication Service (AS) request.
Throwing the rulebook at such devices, Microsoft suggests that section 3.2.1 of RFC 4556 spec clearly states that compliant smart card devices either use DH for key-exchange, or support and notify the Kerberos Domain Controller (KDC) of their support for triple DES.
Temporary mitigations
Microsoft addsthat the issue crept up when it implemented the fix for the information disclosure vulnerability in the Windows Key Distribution Center tracked asCVE-2021-33764.
The software gian advises Windows 10 users who encounter this issue to first ensure they are using the latest drivers and firmware on the affected printing and scanning devices.
If updating the drivers and firmware doesn’t work, Microsoft suggests users to contact the device manufacturers to implement changes to make the devices compliant with CVE-2021-33764.
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Meanwhile, Microsoft says it is working on a temporary mitigation, adding that the affected devices should work without issues when using the traditional username and password authentication.
With almost two decades of writing and reporting on Linux, Mayank Sharma would like everyone to think he’sTechRadar Pro’sexpert on the topic. Of course, he’s just as interested in other computing topics, particularly cybersecurity, cloud, containers, and coding.
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