Error pulling image configuration

Hello,

We started experiencing the following issue this morning which prevents us from pulling images from docker hub:

docker pull ubuntu
Using default tag: latest
latest: Pulling from library/ubuntu
00d679a470c4: Retrying in 1 second
error pulling image configuration: download failed after attempts=6: tls: failed to verify certificate: x509: certificate is not authorized to sign other certificates

Nothing changed on our end to cause this behaviour.
We are getting this on CentOS 7 servers, Docker version 26.1.3, build b72abbb and the steps to reproduce this are just executing the docker pull command on any image that is hosted in docker hub. Could you please check this and let us know if more information is needed and let us know if you have any tips on how we can troubleshoot this.

Regards,
Aksel

1 Like

This smells like tls inspection is in place in your network.

Please use the forum search using the search terms “tls inspection”.

Thank you for your reply.

I found this thread by searching for “tls inspection” - download.docker.com SSL certificate is NOT trusted (self-signed). . But when I check the certificates with the openssl command I see the correct ones issued by Amazon and Starfield so I think that is not the case, what do you think?

bin]# openssl s_client -showcerts -verify 5 -connect registry-1.docker.io:443
verify depth is 5
CONNECTED(00000003)
depth=3 C = US, ST = Arizona, L = Scottsdale, O = "Starfield Technologies, Inc.", CN = Starfield Services Root Certificate Authority - G2
verify error:num=20:unable to get local issuer certificate
verify return:1
depth=2 C = US, O = Amazon, CN = Amazon Root CA 1
verify return:1
depth=1 C = US, O = Amazon, CN = Amazon RSA 2048 M03
verify return:1
depth=0 CN = *.docker.com
verify return:1
---
Certificate chain
 0 s:CN = *.docker.com
   i:C = US, O = Amazon, CN = Amazon RSA 2048 M03
-----BEGIN CERTIFICATE-----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QQbXcbnOwdJA9paEhvu6hzId/R43jlAAAAGOp7W2/QAABAMARzBFAiEA2tUQb1DU
LU+2gYOgbBU1jTxP39muNekawS1k1+DoHlYCIBqez/qCxV//zQkNMqJkeZ0tHt8F
6zY2fClkdMCI9s7eMA0GCSqGSIb3DQEBCwUAA4IBAQAtKmBHJf6n4kf/9Il8Hzkb
Y64dNy64C4lM2MyAEuO2rW36PnlD45rHCPFMqRKR9UvmUTEm+fJBEVvVxX4bzW9k
DqWuioOyYDug7IAFsXkiUnRtqq5jxZcGugnDJi5ONx0XNmc8p+3Y6sPTfAqRjqUZ
cYuxMj/EHBhBwNF+M5AuHyRd2EZTYy3fBX/9ubcL4wNgiij7/tB7MbtbJjFpqxlU
T90XsvCf4TeN6RHnG8kFZByC0xi0qVrQOxZAVczpXvaLevP9CT7EqBQRQXtyuLCf
oPBIQpMqJ/7XD0ZIoFZ+Obd7f2IVVEs5aYCV06TkvWYqPFd9wJYNyJin/4ITTtoz
-----END CERTIFICATE-----
 1 s:C = US, O = Amazon, CN = Amazon RSA 2048 M03
   i:C = US, O = Amazon, CN = Amazon Root CA 1
-----BEGIN CERTIFICATE-----
MIIEXjCCA0agAwIBAgITB3MSTNQG0mfAmRzdKZqfODF5hTANBgkqhkiG9w0BAQsF
ADA5MQswCQYDVQQGEwJVUzEPMA0GA1UEChMGQW1hem9uMRkwFwYDVQQDExBBbWF6
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MAkGA1UEBhMCVVMxDzANBgNVBAoTBkFtYXpvbjEcMBoGA1UEAxMTQW1hem9uIFJT
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b3RjYTEuY3JsMBMGA1UdIAQMMAowCAYGZ4EMAQIBMA0GCSqGSIb3DQEBCwUAA4IB
AQAGjeWm2cC+3z2MzSCnte46/7JZvj3iQZDY7EvODNdZF41n71Lrk9kbfNwerK0d
VNzW36Wefr7j7ZSwBVg50W5ay65jNSN74TTQV1yt4WnSbVvN6KlMs1hiyOZdoHKs
KDV2UGNxbdoBYCQNa2GYF8FQIWLugNp35aSOpMy6cFlymFQomIrnOQHwK1nvVY4q
xDSJMU/gNJz17D8ArPN3ngnyZ2TwepJ0uBINz3G5te2rdFUF4i4Y3Bb7FUlHDYm4
u8aIRGpk2ZpfXmxaoxnbIBZRvGLPSUuPwnwoUOMsJ8jirI5vs2dvchPb7MtI1rle
i02f2ivH2vxkjDLltSpe2fiC
-----END CERTIFICATE-----
 2 s:C = US, O = Amazon, CN = Amazon Root CA 1
   i:C = US, ST = Arizona, L = Scottsdale, O = "Starfield Technologies, Inc.", CN = Starfield Services Root Certificate Authority - G2
-----BEGIN CERTIFICATE-----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AAOCAQEAYjdCXLwQtT6LLOkMm2xF4gcAevnFWAu5CIw+7bMlPLVvUOTNNWqnkzSW
MiGpSESrnO09tKpzbeR/FoCJbM8oAxiDR3mjEH4wW6w7sGDgd9QIpuEdfF7Au/ma
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akcjMS9cmvqtmg5iUaQqqcT5NJ0hGA==
-----END CERTIFICATE-----
 3 s:C = US, ST = Arizona, L = Scottsdale, O = "Starfield Technologies, Inc.", CN = Starfield Services Root Certificate Authority - G2
   i:C = US, O = "Starfield Technologies, Inc.", OU = Starfield Class 2 Certification Authority
-----BEGIN CERTIFICATE-----
MIIEdTCCA12gAwIBAgIJAKcOSkw0grd/MA0GCSqGSIb3DQEBCwUAMGgxCzAJBgNV
BAYTAlVTMSUwIwYDVQQKExxTdGFyZmllbGQgVGVjaG5vbG9naWVzLCBJbmMuMTIw
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VsyuLAOQ1xk4meTKCRlb/weWsKh/NEnfVqn3sF/tM+2MR7cwA130A4w=
-----END CERTIFICATE-----
---
Server certificate
subject=CN = *.docker.com

issuer=C = US, O = Amazon, CN = Amazon RSA 2048 M03

---
No client certificate CA names sent
Peer signing digest: SHA256
Peer signature type: RSA-PSS
Server Temp Key: X25519, 253 bits
---
SSL handshake has read 5584 bytes and written 386 bytes
Verification error: unable to get local issuer certificate
---
New, TLSv1.3, Cipher is TLS_AES_128_GCM_SHA256
Server public key is 2048 bit
Secure Renegotiation IS NOT supported
Compression: NONE
Expansion: NONE
No ALPN negotiated
Early data was not sent
Verify return code: 20 (unable to get local issuer certificate)
---
HTTP/1.1 408 Request Time-out
Content-length: 110
Cache-Control: no-cache
Connection: close
Content-Type: text/html

<html><body><h1>408 Request Time-out</h1>
Your browser didn't send a complete request in time.
</body></html>
closed

I think in your case the problem is indeed not tls inspection. Your system seem to lack CA certificates that are usually present in the systems trust store (on Linux it’s usually comming from the cacerts package.

My output looks like this

me@host:~$ openssl s_client -showcerts -verify 5 -connect registry-1.docker.io:443
verify depth is 5
CONNECTED(00000003)
depth=2 C = US, O = Amazon, CN = Amazon Root CA 1
verify return:1
depth=1 C = US, O = Amazon, CN = Amazon RSA 2048 M03
verify return:1
depth=0 CN = *.docker.com
verify return:1
---
Certificate chain
 0 s:CN = *.docker.com
   i:C = US, O = Amazon, CN = Amazon RSA 2048 M03
   a:PKEY: rsaEncryption, 2048 (bit); sigalg: RSA-SHA256
   v:NotBefore: Apr  4 00:00:00 2024 GMT; NotAfter: May  3 23:59:59 2025 GMT
-----BEGIN CERTIFICATE-----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Ux7qLIkiW5EGRfUQapQON+nNfXJu79tnp1ACIG11a+9rP8HRV8FW4fHjczAWRIZk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-----END CERTIFICATE-----
 1 s:C = US, O = Amazon, CN = Amazon RSA 2048 M03
   i:C = US, O = Amazon, CN = Amazon Root CA 1
   a:PKEY: rsaEncryption, 2048 (bit); sigalg: RSA-SHA256
   v:NotBefore: Aug 23 22:26:04 2022 GMT; NotAfter: Aug 23 22:26:04 2030 GMT
-----BEGIN CERTIFICATE-----
MIIEXjCCA0agAwIBAgITB3MSTNQG0mfAmRzdKZqfODF5hTANBgkqhkiG9w0BAQsF
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i02f2ivH2vxkjDLltSpe2fiC
-----END CERTIFICATE-----
 2 s:C = US, O = Amazon, CN = Amazon Root CA 1
   i:C = US, ST = Arizona, L = Scottsdale, O = "Starfield Technologies, Inc.", CN = Starfield Services Root C
   a:PKEY: rsaEncryption, 2048 (bit); sigalg: RSA-SHA256
   v:NotBefore: May 25 12:00:00 2015 GMT; NotAfter: Dec 31 01:00:00 2037 GMT
-----BEGIN CERTIFICATE-----
MIIEkjCCA3qgAwIBAgITBn+USionzfP6wq4rAfkI7rnExjANBgkqhkiG9w0BAQsF
ADCBmDELMAkGA1UEBhMCVVMxEDAOBgNVBAgTB0FyaXpvbmExEzARBgNVBAcTClNj
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-----END CERTIFICATE-----
 3 s:C = US, ST = Arizona, L = Scottsdale, O = "Starfield Technologies, Inc.", CN = Starfield Services Root C
   i:C = US, O = "Starfield Technologies, Inc.", OU = Starfield Class 2 Certification Authority
   a:PKEY: rsaEncryption, 2048 (bit); sigalg: RSA-SHA256
   v:NotBefore: Sep  2 00:00:00 2009 GMT; NotAfter: Jun 28 17:39:16 2034 GMT
-----BEGIN CERTIFICATE-----
MIIEdTCCA12gAwIBAgIJAKcOSkw0grd/MA0GCSqGSIb3DQEBCwUAMGgxCzAJBgNV
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VsyuLAOQ1xk4meTKCRlb/weWsKh/NEnfVqn3sF/tM+2MR7cwA130A4w=
-----END CERTIFICATE-----
---
Server certificate
subject=CN = *.docker.com
issuer=C = US, O = Amazon, CN = Amazon RSA 2048 M03
---
No client certificate CA names sent
Peer signing digest: SHA256
Peer signature type: RSA-PSS
Server Temp Key: X25519, 253 bits
---
SSL handshake has read 5584 bytes and written 386 bytes
Verification: OK
---
New, TLSv1.3, Cipher is TLS_AES_128_GCM_SHA256
Server public key is 2048 bit
Secure Renegotiation IS NOT supported
Compression: NONE
Expansion: NONE
No ALPN negotiated
Early data was not sent
Verify return code: 0 (ok)
---

HTTP/1.1 408 Request Time-out
Content-length: 110
Cache-Control: no-cache
Connection: close
Content-Type: text/html

<html><body><h1>408 Request Time-out</h1>
Your browser didn't send a complete request in time.
</body></html>
closed

Dears,

We have exactly the same issue since Monday 10 June 2024 AM

docker pull hello-world
Using default tag: latest
latest: Pulling from library/hello-world
c1ec31eb5944: Retrying in 1 second
error pulling image configuration: download failed after attempts=6: x509: certificate is not authorized to sign other certificates

here is the result of the command in our case

$openssl s_client -showcerts -verify 5 -connect registry-1.docker.io:443
verify depth is 5
CONNECTED(00000003)
depth=2 C = US, O = Amazon, CN = Amazon Root CA 1
verify return:1
depth=1 C = US, O = Amazon, CN = Amazon RSA 2048 M03
verify return:1
depth=0 CN = *.docker.com
verify return:1
---
Certificate chain
 0 s:CN = *.docker.com
   i:C = US, O = Amazon, CN = Amazon RSA 2048 M03
-----BEGIN CERTIFICATE-----
MIIGLDCCBRSgAwIBAgIQAvaL+LumZ2xml7m+vxN6XTANBgkqhkiG9w0BAQsFADA8
MQswCQYDVQQGEwJVUzEPMA0GA1UEChMGQW1hem9uMRwwGgYDVQQDExNBbWF6b24g
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-----END CERTIFICATE-----
 1 s:C = US, O = Amazon, CN = Amazon RSA 2048 M03
   i:C = US, O = Amazon, CN = Amazon Root CA 1
-----BEGIN CERTIFICATE-----
MIIEXjCCA0agAwIBAgITB3MSTNQG0mfAmRzdKZqfODF5hTANBgkqhkiG9w0BAQsF
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i02f2ivH2vxkjDLltSpe2fiC
-----END CERTIFICATE-----
 2 s:C = US, O = Amazon, CN = Amazon Root CA 1
   i:C = US, ST = Arizona, L = Scottsdale, O = "Starfield Technologies, Inc.", CN = Starfield Services Root Certificate Authority - G2
-----BEGIN CERTIFICATE-----
MIIEkjCCA3qgAwIBAgITBn+USionzfP6wq4rAfkI7rnExjANBgkqhkiG9w0BAQsF
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MiGpSESrnO09tKpzbeR/FoCJbM8oAxiDR3mjEH4wW6w7sGDgd9QIpuEdfF7Au/ma
eyKdpwAJfqxGF4PcnCZXmTA5YpaP7dreqsXMGz7KQ2hsVxa81Q4gLv7/wmpdLqBK
bRRYh5TmOTFffHPLkIhqhBGWJ6bt2YFGpn6jcgAKUj6DiAdjd4lpFw85hdKrCEVN
0FE6/V1dN2RMfjCyVSRCnTawXZwXgWHxyvkQAiSr6w10kY17RSlQOYiypok1JR4U
akcjMS9cmvqtmg5iUaQqqcT5NJ0hGA==
-----END CERTIFICATE-----
 3 s:C = US, ST = Arizona, L = Scottsdale, O = "Starfield Technologies, Inc.", CN = Starfield Services Root Certificate Authority - G2
   i:C = US, O = "Starfield Technologies, Inc.", OU = Starfield Class 2 Certification Authority
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
---
Server certificate
subject=CN = *.docker.com

issuer=C = US, O = Amazon, CN = Amazon RSA 2048 M03

---
No client certificate CA names sent
Peer signing digest: SHA256
Peer signature type: RSA-PSS
Server Temp Key: X25519, 253 bits
---
SSL handshake has read 5584 bytes and written 376 bytes
Verification: OK
---
New, TLSv1.3, Cipher is TLS_AES_128_GCM_SHA256
Server public key is 2048 bit
Secure Renegotiation IS NOT supported
Compression: NONE
Expansion: NONE
No ALPN negotiated
Early data was not sent
Verify return code: 0 (ok)
---
HTTP/1.1 408 Request Time-out
Content-length: 110
Cache-Control: no-cache
Connection: close
Content-Type: text/html

<html><body><h1>408 Request Time-out</h1>
Your browser didn't send a complete request in time.
</body></html>
closed

the only remark i noticed is that the server certificate start date was updated last week-end Saturday June 8 PM evening, after this everything stopped to work properly

curl -vvvv https://production.cloudflare.docker.com/
*   Trying 104.16.99.215:443...
* TCP_NODELAY set
* Connected to production.cloudflare.docker.com (104.16.99.215) port 443 (#0)
* ALPN, offering h2
* ALPN, offering http/1.1
* successfully set certificate verify locations:
*   CAfile: /etc/ssl/certs/ca-certificates.crt
  CApath: /etc/ssl/certs
* TLSv1.3 (OUT), TLS handshake, Client hello (1):
* TLSv1.3 (IN), TLS handshake, Server hello (2):
* TLSv1.2 (IN), TLS handshake, Certificate (11):
* TLSv1.2 (IN), TLS handshake, Server key exchange (12):
* TLSv1.2 (IN), TLS handshake, Server finished (14):
* TLSv1.2 (OUT), TLS handshake, Client key exchange (16):
* TLSv1.2 (OUT), TLS change cipher, Change cipher spec (1):
* TLSv1.2 (OUT), TLS handshake, Finished (20):
* TLSv1.2 (IN), TLS handshake, Finished (20):
* SSL connection using TLSv1.2 / ECDHE-ECDSA-CHACHA20-POLY1305
* ALPN, server accepted to use h2
* Server certificate:
*  subject: CN=production.cloudflare.docker.com
***  start date: Jun  8 23:01:15 2024 GMT**
*  expire date: Sep  6 23:01:14 2024 GMT
*  subjectAltName: host "production.cloudflare.docker.com" matched cert's "production.cloudflare.docker.com"
*  issuer: C=US; O=Let's Encrypt; CN=E6
*  SSL certificate verify ok.
* Using HTTP2, server supports multi-use
* Connection state changed (HTTP/2 confirmed)
* Copying HTTP/2 data in stream buffer to connection buffer after upgrade: len=0
* Using Stream ID: 1 (easy handle 0x56361b7270e0)
> GET / HTTP/2
> Host: production.cloudflare.docker.com
> user-agent: curl/7.68.0
> accept: */*
>
* Connection state changed (MAX_CONCURRENT_STREAMS == 100)!
< HTTP/2 403
< date: Wed, 12 Jun 2024 11:46:19 GMT
< content-type: application/json
< content-length: 55
< server: cloudflare
< cf-ray: 89299985eedb9bc8-FRA
<
* Connection #0 to host production.cloudflare.docker.com left intact
{"status":403,"message":"Error: invalid URL signature"}

Did you find any workaround or solution related to this issue on the docker community forums or support ?

$uname -a
Linux ip-10-0-16-164 5.15.0-1062-aws #68~20.04.1-Ubuntu SMP Wed May 1 15:24:09 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux

$docker version
Client:
 Version:           20.10.21
 API version:       1.41
 Go version:        go1.18.1
 Git commit:        20.10.21-0ubuntu1~20.04.2
 Built:             Thu Apr 27 05:56:19 2023
 OS/Arch:           linux/amd64
 Context:           default
 Experimental:      true

Server:
 Engine:
  Version:          20.10.21
  API version:      1.41 (minimum version 1.12)
  Go version:       go1.18.1
  Git commit:       20.10.21-0ubuntu1~20.04.2
  Built:            Thu Apr 27 05:37:01 2023
  OS/Arch:          linux/amd64
  Experimental:     false
 containerd:
  Version:          1.6.12-0ubuntu1~20.04.3
  GitCommit:
 runc:
  Version:          1.1.7-0ubuntu1~20.04.2
  GitCommit:
 docker-init:
  Version:          0.19.0
  GitCommit:

Thanks and Kr,
Tarik

Hi,

Yes we found a workaround, in our case it was caused by squid ssl bumping so we had to add production.cloudflare.docker.com as a broken_site acl and do ssl_bump slice on it. If you also use squid this might be helpful - squid : ssl_bump configuration directive - please check the example at the end of the page. We also noticed this after that certificate was reissued and don’t know exactly why it started failing, we didn’t have this problem before.

Regards,
Aksel

Hi Aksel,

the ssl_bump on the cloudflare docker DNS works too, we had also a SQUID between.

thanks and Regards,
Tarik

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