On Saturday, May 30, 2020, an initially unclear issue arose with the popular SSL/TLS certificates from the vendor Sectigo (formerly Comodo). The certificates themselves remained fully functional; however, one of the intermediate CA certificates in the chains that came with these certificates had 'expired'. The situation was not critically fatal but unpleasant: current versions of browsers did not notice anything amiss, but most automation tools and older browsers/OS were unprepared for this turn of events.
Habr was no exception, which is why this postmortem has been written.
TL;DR The solution is at the very end.
Let’s skip the basic theory about PKI, SSL/TLS, HTTPS, and so on. The mechanism of domain security certificate validation consists of building a chain of several certificates up to one that is trusted by the browser or operating system, which are stored in the so-called Trust Store. This list is distributed with the operating system, the code execution environment ecosystem, or the browser. All certificates have an expiration date, after which they are considered untrusted, including certificates in the trust store. How did the trust chain look before the fateful day? We can figure that out with the web utility from Qualys.
So, one of the most popular 'commercial' certificates is the Sectigo Positive SSL (previously known as Comodo Positive SSL; certificates with this name are still in circulation). It is classified as a DV certificate. DV is the most basic level of certification, meaning that validation of domain management access is performed by the issuer of such a certificate. In fact, DV stands for 'domain validation'. For reference: there are also OV (organization validation) and EV (extended validation), and the free certificate from Let’s Encrypt is also a DV. For those who, for any reason, are unhappy with the ACME mechanism, the Positive SSL product is the most suitable in terms of price/performance ratio (a single-domain certificate costs about $5-7 per year, with a total certificate validity period of up to 2 years and 3 months).
The typical Sectigo DV (RSA) certificate was previously supplied with the following chain of intermediate CAs:
Certificate #1:
Data:
Version: 3 (0x2)
Serial Number:
7d:5b:51:26:b4:76:ba:11:db:74:16:0b:bc:53:0d:a7
Signature Algorithm: sha384WithRSAEncryption
Issuer: C=US, ST=New Jersey, L=Jersey City, O=The USERTRUST Network, CN=USERTrust RSA Certification Authority
Validity
Not Before: Nov 2 00:00:00 2018 GMT
Not After : Dec 31 23:59:59 2030 GMT
Subject: C=GB, ST=Greater Manchester, L=Salford, O=Sectigo Limited, CN=Sectigo RSA Domain Validation Secure Server CA
Certificate #2:
Data:
Version: 3 (0x2)
Serial Number:
13:ea:28:70:5b:f4:ec:ed:0c:36:63:09:80:61:43:36
Signature Algorithm: sha384WithRSAEncryption
Issuer: C=SE, O=AddTrust AB, OU=AddTrust External TTP Network, CN=AddTrust External CA Root
Validity
Not Before: May 30 10:48:38 2000 GMT
Not After : May 30 10:48:38 2020 GMT
Subject: C=US, ST=New Jersey, L=Jersey City, O=The USERTRUST Network, CN=USERTrust RSA Certification AuthorityThe "third certificate," a self-signed one from AddTrust AB, is missing here, as it became considered bad practice to include self-signed root certificates in chains. It's worth noting that the intermediate CA issued by UserTrust from AddTrust has an expiry date of May 30, 2020. This is not a coincidence, as a decommissioning procedure was planned for this CA. It was expected that by May 30, 2020, a cross-signed certificate from UserTrust (essentially the same certificate, or rather the public key) would already appear in all trust stores, allowing even a chain including an untrusted certificate to have alternative paths, and no one would notice. However, plans were thwarted by the reality of the broad term "legacy systems." Indeed, users of the current versions of browsers noticed nothing; however, a mountain of automation built on curl and SSL/TLS libraries from various programming languages and execution environments broke. It is important to understand that many products do not rely on the built-in OS chain-building tools but "carry" their own trust store with them. And they do not always contain what one would like to see. . Also, in Linux, packages like ca-certificates are not always updated. As a result, everything seems fine, but something doesn't work here or there.
Figure 1 shows that although everything looked normal for the vast majority, something broke for some users, causing a noticeable drop in traffic (left red line), which later increased when one of the key certificates was replaced (right line). There were spikes in the middle when other certificates were changed, which also affected something. Since for most things continued to work more or less as usual (except for strange glitches like being unable to upload images to Habrastorage), an indirect conclusion can be drawn about the number of legacy clients and bots on Habr.
Figure 1. Traffic chart on Habr.
Figure 2 allows us to assess how the 'alternative' chain to a trusted CA certificate is built in the current versions of browsers, even with an 'expired' certificate in the chain. This, as Sectigo itself believed, was the reason not to do anything.
Figure 2. The chain to a trusted certificate in the modern version of the browser.
In Figure 3, we can see how everything actually looks when something goes wrong and we have a legacy system. In this case, the HTTPS connection is not established and we see an error like 'certificate validation failed' or something similar.
Figure 3. The chain was invalidated because the root certificate and the signed intermediate one had 'expired'.
In Figure 4, we already see a 'solution' for legacy systems: there is another intermediate certificate, or rather a 'cross-signature' from another CA, which is usually pre-installed in legacy systems. This is what needs to be done: find this certificate (marked as Extra download) and replace the 'expired' one with it.
Figure 4. Alternative chain for legacy systems.
By the way, the problem did not receive wide publicity and any public discussion, partly due to Sectigo's excessive arrogance. For example, here is the opinion of one of the certificate providers regarding this situation: the situation:
Previously they [Sectigo] assured everyone that no issues will be. However, the reality is that some legacy servers/devices are affected.
That is a ridiculous situation. We pointed their attention to the expiring AddTrust RSA/ECC multiple times within a year and each time Sectigo assured us no issues will be.
I personally asked on Stack Overflow about this a month ago, but apparently the project's audience is not quite suitable for such questions, so I had to answer it myself after analyzing.
Sectigo on this matter FAQ, but it is so unreadable and verbose that it is impossible to use. Here is a quote that encapsulates the entire publication:
What You Need to Do
For most use cases, including certificates serving modern client or server systems, no action is required, whether or not you have issued certificates cross-chained to the AddTrust root.As of April 30, 2020: For business processes that depend on very old systems, Sectigo has made available (by default in the certificate bundles) a new legacy root for cross-signing, the “AAA Certificate Services” root. However, please use extreme caution about any process that depends on very old legacy systems. Systems that have not received the updates necessary to support newer roots such as Sectigo’s COMODO root will inevitably be missing other essential security updates and should be considered insecure. If you would still like to cross-sign to the AAA Certificate Services root, please contact Sectigo directly.
I especially like the term “very old.” For example, curl in the console of Ubuntu Linux 18.04 LTS (our current base OS) with the latest updates no older than a month can't be called very old, yet it doesn't work.
Most certificate distributors released their notes with solutions closer to the evening of May 30. For instance, a very solid technical one from (with a specific description of what to do and ready-made CA-bundles in zip archives, but only RSA):
Figure 5. Seven steps to quickly fix everything.
There is from Redhat, but it is all more Legacy there and even requires installing an even more root legacy certificate from Comodo to make everything work.
Solution
It is worth duplicating the solution here as well. Below are two sets of chains for certificates DV Sectigo (not Comodo!), one for conventional RSA certificates, another for less conventional ECC (ECDSA) certificates (we have been using two chains for quite a while). ECC was more complicated, as most solutions do not account for the availability of such certificates due to their low distribution. As a result, the necessary intermediate certificate was found on .
A chain for certificates based on the key algorithm RSA. Compare with your own chain and note that only the lower certificate was replaced, while the upper one remained the same. I distinguish them in everyday situations by the last three symbols of the base64 blocks excluding the equal sign (in this case En8= and 1+V):
# Subject: /C=GB/ST=Greater Manchester/L=Salford/O=Sectigo Limited/CN=Sectigo RSA Domain Validation Secure Server CA
# Algo: RSA, key size: 2048
# Issuer: /C=US/ST=New Jersey/L=Jersey City/O=The USERTRUST Network/CN=USERTrust RSA Certification Authority
# Not valid before: 2018-11-02T00:00:00Z
# Not valid after: 2030-12-31T23:59:59Z
# SHA-1 Fingerprint: 33:E4:E8:08:07:20:4C:2B:61:82:A3:A1:4B:59:1A:CD:25:B5:F0:DB
# SHA-256 Fingerprint: 7F:A4:FF:68:EC:04:A9:9D:75:28:D5:08:5F:94:90:7F:4D:1D:D1:C5:38:1B:AC:DC:83:2E:D5:C9:60:21:46:76
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
# Subject: /C=US/ST=New Jersey/L=Jersey City/O=The USERTRUST Network/CN=USERTrust RSA Certification Authority
# Algo: RSA, key size: 4096
# Issuer: /C=GB/ST=Greater Manchester/L=Salford/O=Comodo CA Limited/CN=AAA Certificate Services
# Not valid before: 2019-03-12T00:00:00Z
# Not valid after: 2028-12-31T23:59:59Z
# SHA-1 Fingerprint: D8:9E:3B:D4:3D:5D:90:9B:47:A1:89:77:AA:9D:5C:E3:6C:EE:18:4C
# SHA-256 Fingerprint: 68:B9:C7:61:21:9A:5B:1F:01:31:78:44:74:66:5D:B6:1B:BD:B1:09:E0:0F:05:CA:9F:74:24:4E:E5:F5:F5:2B
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----A chain for certificates based on the key algorithm ECC. Similarly, with the RSA chain, only the lower certificate was replaced, while the upper one remained the same (in this case fmA== and v/c=):
# Subject: /C=GB/ST=Greater Manchester/L=Salford/O=Sectigo Limited/CN=Sectigo ECC Domain Validation Secure Server CA
# Algo: EC secp256r1, key size: 256
# Issuer: /C=US/ST=New Jersey/L=Jersey City/O=The USERTRUST Network/CN=USERTrust ECC Certification Authority
# Not valid before: 2018-11-02T00:00:00Z
# Not valid after: 2030-12-31T23:59:59Z
# SHA-1 Fingerprint: E8:49:90:CB:9B:F8:E3:AB:0B:CA:E8:A6:49:CB:30:FE:4D:C4:D7:67
# SHA-256 Fingerprint: 61:E9:73:75:E9:F6:DA:98:2F:F5:C1:9E:2F:94:E6:6C:4E:35:B6:83:7C:E3:B9:14:D2:24:5C:7F:5F:65:82:5F
-----BEGIN CERTIFICATE-----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cS0chWBNKPFNpvDKdrdKRe+oAkr2jU+ubgIxAODheSr2XhcA7oz9HmedGdMhlrd9
4ToKFbZl+/OnFFzqnvOhcjHvClECEQcKmc8fmA==
-----END CERTIFICATE-----
# Subject: /C=US/ST=New Jersey/L=Jersey City/O=The USERTRUST Network/CN=USERTrust ECC Certification Authority
# Algo: EC secp384r1, key size: 384
# Issuer: /C=GB/ST=Greater Manchester/L=Salford/O=Comodo CA Limited/CN=AAA Certificate Services
# Not valid before: 2019-03-12T00:00:00Z
# Not valid after: 2028-12-31T23:59:59Z
# SHA-1 Fingerprint: CA:77:88:C3:2D:A1:E4:B7:86:3A:4F:B5:7D:00:B5:5D:DA:CB:C7:F9
# SHA-256 Fingerprint: A6:CF:64:DB:B4:C8:D5:FD:19:CE:48:89:60:68:DB:03:B5:33:A8:D1:33:6C:62:56:A8:7D:00:CB:B3:DE:F3:EA
-----BEGIN CERTIFICATE-----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MAYGBFUdIAAwQwYDVR0fBDwwOjA4oDagNIYyaHR0cDovL2NybC5jb21vZG9jYS5j
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CCsGAQUFBzABhhhodHRwOi8vb2NzcC5jb21vZG9jYS5jb20wDQYJKoZIhvcNAQEM
BQADggEBABns652JLCALBIAdGN5CmXKZFjK9Dpx1WywV4ilAbe7/ctvbq5AfjJXy
ij0IckKJUAfiORVsAYfZFhr1wHUrxeZWEQff2Ji8fJ8ZOd+LygBkc7xGEJuTI42+
FsMuCIKchjN0djsoTI0DQoWz4rIjQtUfenVqGtF8qmchxDM6OW1TyaLtYiKou+JV
bJlsQ2uRl9EMC5MCHdK8aXdJ5htN978UeAOwproLtOGFfy/cQjutdAFI3tZs4RmY
CV4Ks2dH/hzg1cEo70qLRDEmBDeNiXQ2Lu+lIg+DdEmSx/cQwgwp+7e9un/jX9Wf
8qn0dNW44bOwgeThpWOjzOoEeJBuv/c=
-----END CERTIFICATE-----That's about it. Thank you for your attention.
Source: habr.com
