Qubes OS: A reasonably secure operating system (@qubes-os.org.web.brid.gy)

Qubes Canary 043 We have published Qubes Canary 043. The text of this canary and its accompanying cryptographic signatures are reproduced below. For an explanation of this announcement and instructions for authenticating this canary, please see the end of this announcement. ## Qubes Canary 043 ---===[ Qubes Canary 043 ]===--- Statements ----------- The Qubes security team members who have digitally signed this file [1] state the following: 1. The date of issue of this canary is June 03, 2025. 2. There have been 107 Qubes security bulletins published so far. 3. The Qubes Master Signing Key fingerprint is: 427F 11FD 0FAA 4B08 0123 F01C DDFA 1A3E 3687 9494 4. No warrants have ever been served to us with regard to the Qubes OS Project (e.g. to hand out the private signing keys or to introduce backdoors). 5. We plan to publish the next of these canary statements in the first fourteen days of September 2025. Special note should be taken if no new canary is published by that time or if the list of statements changes without plausible explanation. Special announcements ---------------------- None. Disclaimers and notes ---------------------- We would like to remind you that Qubes OS has been designed under the assumption that all relevant infrastructure is permanently compromised. This means that we assume NO trust in any of the servers or services which host or provide any Qubes-related data, in particular, software updates, source code repositories, and Qubes ISO downloads. This canary scheme is not infallible. Although signing the declaration makes it very difficult for a third party to produce arbitrary declarations, it does not prevent them from using force or other means, like blackmail or compromising the signers' laptops, to coerce us to produce false declarations. The proof of freshness provided below serves to demonstrate that this canary could not have been created prior to the date stated. It shows that a series of canaries was not created in advance. This declaration is merely a best effort and is provided without any guarantee or warranty. It is not legally binding in any way to anybody. None of the signers should be ever held legally responsible for any of the statements made here. Proof of freshness ------------------- Tue, 03 Jun 2025 06:49:12 +0000 Source: DER SPIEGEL - International (https://www.spiegel.de/international/index.rss) Interview with Danish Prime Minister Frederiksen: "If Trump Wants a Trade War, We Will Respond" A Difficult Relationship: How the Gaza War Is Changing Germany's View of Israel The German Chancellor's Diplomacy Offensive: Can Friedrich Merz Help Keep Trump from Abandoning Europe? Death Zone Drama on K2: "Brother, It's Just Me and You" Ruqqia Fights for Survival: Children in Gaza Facing Malnourishment as Humanitarian Situation Worsens Source: NYT > World News (https://rss.nytimes.com/services/xml/rss/nyt/World.xml) Gaza Cease-Fire Negotiations Hit A New Impasse Over An Old Dispute South Korea’s New President Will Lead A Country More Divided Than Ever Ukraine and Russia Met for 2nd Round of Talks as Attacks Escalate In Drone Attacks on Russia, Ukraine Aims for Strategic and Symbolic Blow Poland Election: Karol Nawrocki Wins Presidential Vote Source: BBC News (https://feeds.bbci.co.uk/news/world/rss.xml) Suspect in Colorado fire attack planned for a year, FBI says Russia and Ukraine fail again to agree ceasefire but commit to prisoner swap How Ukraine carried out daring 'Spider Web' attack on Russian bombers Disney makes hundreds more layoffs as it cuts costs Mount Etna erupts as large plumes rise from volcano Source: Blockchain.info 00000000000000000000ad08ae4d191a62914466df62c55d1785bea4b4fd2b01 Footnotes ---------- [1] This file should be signed in two ways: (1) via detached PGP signatures by each of the signers, distributed together with this canary in the qubes-secpack.git repo, and (2) via digital signatures on the corresponding qubes-secpack.git repo tags. [2] [2] Don't just trust the contents of this file blindly! Verify the digital signatures! Instructions for doing so are documented here: https://www.qubes-os.org/security/pack/ -- The Qubes Security Team https://www.qubes-os.org/security/ Source: canary-043-2025.txt ## Marek Marczykowski-Górecki’s PGP signature -----BEGIN PGP SIGNATURE----- iQIzBAABCAAdFiEELRdx/k12ftx2sIn61lWk8hgw4GoFAmg+28MACgkQ1lWk8hgw 4GoYZw/7BDoro5qo2ZXxLO3IxeA6jomDhyVWgL/neAe+Y6QH2AZ8sLPewtZ9MJ7f bll8DXLosz+WdWYbFJTnYvsSzZETPq/UQIWc88FXEVcaGAAEUtULDD0PvW0XK2J5 kd1kQiFUij+zWCGHcLU89ZeaCHIWgDMpdDputc8KmLsT2twLFn7sqCPT3K9l9iNY 7Az4wGrAtffVVQt//lU98AS6bsvuPf+J8LdoUm4P/PUGDdr7P8/B7OvXX59bYXaj 3G74LzcXVpesfcGapZbSztnxst7JfYK3N+CVaKaWNiF/hWRdrIYnLkTHZzJspB3m nxaiTOgTIq7uxwmtenkurMCcyzNEEx6qsaAhkmc+lrqTqnNP2PpRR6EIIr6ROmPL ev/1pBW/epsZFK6qOiaHxpyId8BTMSmYGzw5jJ1Bh70g8qg8XTNynv3w4tPAXS76 eU2bW5yPYvgmpI5vK4rmro+3G6GeqMJhZCBBGywUABwzbBG+cp9Vpc7zaSCqE1q3 SPxGopOEOPN65sUHVkqKoOpofYFB20IEF9bXV9Q343FFqn0zRpuOr/FxlYh1JFoL 1JUsJ3FBR3b/x93pddMvzBr0/nZBbrGns1SYTL7lKYGBG5h+cnq5FU+cIKlxdfks j1QEO5yCwyFviqcVT/GyOresRiVORuRRc9XscN8d7ktMXQqKd7g= =xzVH -----END PGP SIGNATURE----- Source: canary-043-2025.txt.sig.marmarek ## Simon Gaiser (aka HW42)’s PGP signature -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEE6hjn8EDEHdrv6aoPSsGN4REuFJAFAmg+8loACgkQSsGN4REu FJCYxA/+NveIrCGg+GKe2nA0SrfpsPSjV3p2HCJeYjUpNVLihKWK4HKPS6seQAeq 2Q5a/E+8YqR7mnnTXOQotyhpKS5+MJ5rmMt3u6wshiYrFzXZ/GB0PmTH3qUPnyFW +hdxmiFAgYHKdriYWFddMOKwNcvlR+gcK0x9QsIRctv4P/Cak/ggumP5435qKUIl n+/qK5mzWP8etlJadOVzyybLAhwbzkRhVRnGDZdUQJMukCeerlAOGEHKl0jq7Wxx MCbNExtodjF6Dh7Tn4Kw2Oy2WdaTLqvWDFLtmnJUSReeJopZ8qHSknLHdwj4kKzm EnqwaazzBcKBSq0GwnjJ4hKnUanvAApaHs/lv83oGkb8Kynhvf+bHATvKe7bxy++ dQjI+zkD3ZuFcTQ0pPrnMlXOPgj+/UZIINlmKmCNnUQdGLUP+IQnxGQD76xkekBu 6dMAUDWPhzJWlQiPPs1Rwb4huXIS78+fUc8fpjVS6uT1AzSqMLVFFSuRmyLm+I1X u+SWgTGxo+7xDhbXaVJoEVB9bEkUMnBxCLxVtRsRSnI6TXFLdpxnuLg4bn6Ojxw5 EmnxHN/LUZbY7ZL3cyQNu+gYm/BPp4phs3peP+C2o/HLVgQf7rUWGEIgUOoyMxyH s0gM/I7fDV37IT1wBGY/pCIGd4b0AkdFw77IL4H+nj44IBE1G8Q= =2iCq -----END PGP SIGNATURE----- Source: canary-043-2025.txt.sig.simon ## What is the purpose of this announcement? The purpose of this announcement is to inform the Qubes community that a new Qubes canary has been published. ## What is a Qubes canary? A Qubes canary is a security announcement periodically issued by the Qubes security team consisting of several statements to the effect that the signers of the canary have not been compromised. The idea is that, as long as signed canaries including such statements continue to be published, all is well. However, if the canaries should suddenly cease, if one or more signers begin declining to sign them, or if the included statements change significantly without plausible explanation, then this may indicate that something has gone wrong. A list of all canaries is available here. The name originates from the practice in which miners would bring caged canaries into coal mines. If the level of methane gas in the mine reached a dangerous level, the canary would die, indicating to miners that they should evacuate. (See the Wikipedia article on warrant canaries for more information, but bear in mind that Qubes Canaries are not strictly limited to legal warrants.) ## Why should I care about canaries? Canaries provide an important indication about the security status of the project. If the canary is healthy, it’s a strong sign that things are running normally. However, if the canary is unhealthy, it could mean that the project or its members are being coerced in some way. ## What are some signs of an unhealthy canary? Here is a non-exhaustive list of examples: * **Dead canary.** In each canary, we state a window of time during which you should expect the next canary to be published. If no canary is published within that window of time and no good explanation is provided for missing the deadline, then the canary has died. * **Missing statement(s).** Canaries include a set of numbered statements at the top. These statements are generally the same across canaries, except for specific numbers and dates that have changed since the previous canary. If an important statement was present in older canaries but suddenly goes missing from new canaries with no correction or explanation, then this may be an indication that the signers can no longer truthfully make that statement. * **Missing signature(s).** Qubes canaries are signed by the members of the Qubes security team (see below). If one of them has been signing all canaries but suddenly and permanently stops signing new canaries without any explanation, then this may indicate that this person is under duress or can no longer truthfully sign the statements contained in the canary. ## Does every unexpected or unusual occurrence related to a canary indicate something bad? No, there are many canary-related possibilities that should _not_ worry you. Here is a non-exhaustive list of examples: * **Unusual reposts.** The only canaries that matter are the ones that are validly signed in the Qubes security pack (qubes-secpack). Reposts of canaries (like the one in this announcement) do not have any authority (except insofar as they reproduce validly-signed text from the qubes-secpack). If the actual canary in the qubes-secpack is healthy, but reposts are late, absent, or modified on the website, mailing lists, forum, or social media platforms, you should not be concerned about the canary. * **Last-minute signature(s).** If the canary is signed at the last minute but before the deadline, that’s okay. (People get busy and procrastinate sometimes.) * **Signatures at different times.** If one signature is earlier or later than the other, but both are present within a reasonable period of time, that’s okay. (For example, sometimes one signer is out of town, but we try to plan the deadlines around this.) * **Permitted changes.** If something about a canary changes without violating any of the statements in prior canaries, that’s okay. (For example, canaries are usually scheduled for the first fourteen days of a given month, but there’s no rule that says they have to be.) * **Unusual but planned changes.** If something unusual happens, but it was announced in advance, and the appropriate statements are signed, that’s okay (e.g., when Joanna left the security team and Simon joined it). In general, it would not be realistic for an organization to exist that never changed, had zero turnover, and never made mistakes. Therefore, it would be reasonable to expect such events to occur periodically, and it would be unreasonable to regard _every_ unusual or unexpected canary-related event as a sign of compromise. For example, if something usual happens with a canary, and we say it was a mistake and correct it (with valid signatures), you will have to decide for yourself whether it’s more likely that it really was just a mistake or that something is wrong and that this is how we chose to send you a subtle signal about it. This will require you to think carefully about which among many possible scenarios is most likely given the evidence available to you. Since this is fundamentally a matter of judgment, canaries are ultimately a _social_ scheme, not a technical one. ## What are the PGP signatures that accompany canaries? A PGP signature is a cryptographic digital signature made in accordance with the OpenPGP standard. PGP signatures can be cryptographically verified with programs like GNU Privacy Guard (GPG). The Qubes security team cryptographically signs all canaries so that Qubes users have a reliable way to check whether canaries are genuine. The only way to be certain that a canary is authentic is by verifying its PGP signatures. ## Why should I care whether a canary is authentic? If you fail to notice that a canary is unhealthy or has died, you may continue to trust the Qubes security team even after they have signaled via the canary (or lack thereof) that they been compromised or coerced. Alternatively, an adversary could fabricate a canary in an attempt to deceive the public. Such a canary would not be validly signed, but users who neglect to check the signatures on the fake canary would not be aware of this, so they may mistakenly believe it to be genuine, especially if it closely mimics the language of authentic canaries. Such falsified canaries could include manipulated text designed to sow fear, uncertainty, and doubt about the security of Qubes OS or the status of the Qubes OS Project. ## How do I verify the PGP signatures on a canary? The following command-line instructions assume a Linux system with `git` and `gpg` installed. (For Windows and Mac options, see OpenPGP software.) 1. Obtain the Qubes Master Signing Key (QMSK), e.g.: $ gpg --fetch-keys https://keys.qubes-os.org/keys/qubes-master-signing-key.asc gpg: directory '/home/user/.gnupg' created gpg: keybox '/home/user/.gnupg/pubring.kbx' created gpg: requesting key from 'https://keys.qubes-os.org/keys/qubes-master-signing-key.asc' gpg: /home/user/.gnupg/trustdb.gpg: trustdb created gpg: key DDFA1A3E36879494: public key "Qubes Master Signing Key" imported gpg: Total number processed: 1 gpg: imported: 1 (For more ways to obtain the QMSK, see How to import and authenticate the Qubes Master Signing Key.) 2. View the fingerprint of the PGP key you just imported. (Note: `gpg>` indicates a prompt inside of the GnuPG program. Type what appears after it when prompted.) $ gpg --edit-key 0x427F11FD0FAA4B080123F01CDDFA1A3E36879494 gpg (GnuPG) 2.2.27; Copyright (C) 2021 Free Software Foundation, Inc. This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. pub rsa4096/DDFA1A3E36879494 created: 2010-04-01 expires: never usage: SC trust: unknown validity: unknown [ unknown] (1). Qubes Master Signing Key gpg> fpr pub rsa4096/DDFA1A3E36879494 2010-04-01 Qubes Master Signing Key Primary key fingerprint: 427F 11FD 0FAA 4B08 0123 F01C DDFA 1A3E 3687 9494 3. **Important:** At this point, you still don’t know whether the key you just imported is the genuine QMSK or a forgery. In order for this entire procedure to provide meaningful security benefits, you _must_ authenticate the QMSK out-of-band. **Do not skip this step!** The standard method is to obtain the QMSK fingerprint from _multiple independent sources in several different ways_ and check to see whether they match the key you just imported. For more information, see How to import and authenticate the Qubes Master Signing Key. **Tip:** After you have authenticated the QMSK out-of-band to your satisfaction, record the QMSK fingerprint in a safe place (or several) so that you don’t have to repeat this step in the future. 4. Once you are satisfied that you have the genuine QMSK, set its trust level to 5 (“ultimate”), then quit GnuPG with `q`. gpg> trust pub rsa4096/DDFA1A3E36879494 created: 2010-04-01 expires: never usage: SC trust: unknown validity: unknown [ unknown] (1). Qubes Master Signing Key Please decide how far you trust this user to correctly verify other users' keys (by looking at passports, checking fingerprints from different sources, etc.) 1 = I don't know or won't say 2 = I do NOT trust 3 = I trust marginally 4 = I trust fully 5 = I trust ultimately m = back to the main menu Your decision? 5 Do you really want to set this key to ultimate trust? (y/N) y pub rsa4096/DDFA1A3E36879494 created: 2010-04-01 expires: never usage: SC trust: ultimate validity: unknown [ unknown] (1). Qubes Master Signing Key Please note that the shown key validity is not necessarily correct unless you restart the program. gpg> q 5. Use Git to clone the qubes-secpack repo. $ git clone https://github.com/QubesOS/qubes-secpack.git Cloning into 'qubes-secpack'... remote: Enumerating objects: 4065, done. remote: Counting objects: 100% (1474/1474), done. remote: Compressing objects: 100% (742/742), done. remote: Total 4065 (delta 743), reused 1413 (delta 731), pack-reused 2591 Receiving objects: 100% (4065/4065), 1.64 MiB | 2.53 MiB/s, done. Resolving deltas: 100% (1910/1910), done. 6. Import the included PGP keys. (See our PGP key policies for important information about these keys.) $ gpg --import qubes-secpack/keys/*/* gpg: key 063938BA42CFA724: public key "Marek Marczykowski-Górecki (Qubes OS signing key)" imported gpg: qubes-secpack/keys/core-devs/retired: read error: Is a directory gpg: no valid OpenPGP data found. gpg: key 8C05216CE09C093C: 1 signature not checked due to a missing key gpg: key 8C05216CE09C093C: public key "HW42 (Qubes Signing Key)" imported gpg: key DA0434BC706E1FCF: public key "Simon Gaiser (Qubes OS signing key)" imported gpg: key 8CE137352A019A17: 2 signatures not checked due to missing keys gpg: key 8CE137352A019A17: public key "Andrew David Wong (Qubes Documentation Signing Key)" imported gpg: key AAA743B42FBC07A9: public key "Brennan Novak (Qubes Website & Documentation Signing)" imported gpg: key B6A0BB95CA74A5C3: public key "Joanna Rutkowska (Qubes Documentation Signing Key)" imported gpg: key F32894BE9684938A: public key "Marek Marczykowski-Górecki (Qubes Documentation Signing Key)" imported gpg: key 6E7A27B909DAFB92: public key "Hakisho Nukama (Qubes Documentation Signing Key)" imported gpg: key 485C7504F27D0A72: 1 signature not checked due to a missing key gpg: key 485C7504F27D0A72: public key "Sven Semmler (Qubes Documentation Signing Key)" imported gpg: key BB52274595B71262: public key "unman (Qubes Documentation Signing Key)" imported gpg: key DC2F3678D272F2A8: 1 signature not checked due to a missing key gpg: key DC2F3678D272F2A8: public key "Wojtek Porczyk (Qubes OS documentation signing key)" imported gpg: key FD64F4F9E9720C4D: 1 signature not checked due to a missing key gpg: key FD64F4F9E9720C4D: public key "Zrubi (Qubes Documentation Signing Key)" imported gpg: key DDFA1A3E36879494: "Qubes Master Signing Key" not changed gpg: key 1848792F9E2795E9: public key "Qubes OS Release 4 Signing Key" imported gpg: qubes-secpack/keys/release-keys/retired: read error: Is a directory gpg: no valid OpenPGP data found. gpg: key D655A4F21830E06A: public key "Marek Marczykowski-Górecki (Qubes security pack)" imported gpg: key ACC2602F3F48CB21: public key "Qubes OS Security Team" imported gpg: qubes-secpack/keys/security-team/retired: read error: Is a directory gpg: no valid OpenPGP data found. gpg: key 4AC18DE1112E1490: public key "Simon Gaiser (Qubes Security Pack signing key)" imported gpg: Total number processed: 17 gpg: imported: 16 gpg: unchanged: 1 gpg: marginals needed: 3 completes needed: 1 trust model: pgp gpg: depth: 0 valid: 1 signed: 6 trust: 0-, 0q, 0n, 0m, 0f, 1u gpg: depth: 1 valid: 6 signed: 0 trust: 6-, 0q, 0n, 0m, 0f, 0u 7. Verify signed Git tags. $ cd qubes-secpack/ $ git tag -v `git describe` object 266e14a6fae57c9a91362c9ac784d3a891f4d351 type commit tag marmarek_sec_266e14a6 tagger Marek Marczykowski-Górecki 1677757924 +0100 Tag for commit 266e14a6fae57c9a91362c9ac784d3a891f4d351 gpg: Signature made Thu 02 Mar 2023 03:52:04 AM PST gpg: using RSA key 2D1771FE4D767EDC76B089FAD655A4F21830E06A gpg: Good signature from "Marek Marczykowski-Górecki (Qubes security pack)" [full] The exact output will differ, but the final line should always start with `gpg: Good signature from...` followed by an appropriate key. The `[full]` indicates full trust, which this key inherits in virtue of being validly signed by the QMSK. 8. Verify PGP signatures, e.g.: $ cd QSBs/ $ gpg --verify qsb-087-2022.txt.sig.marmarek qsb-087-2022.txt gpg: Signature made Wed 23 Nov 2022 04:05:51 AM PST gpg: using RSA key 2D1771FE4D767EDC76B089FAD655A4F21830E06A gpg: Good signature from "Marek Marczykowski-Górecki (Qubes security pack)" [full] $ gpg --verify qsb-087-2022.txt.sig.simon qsb-087-2022.txt gpg: Signature made Wed 23 Nov 2022 03:50:42 AM PST gpg: using RSA key EA18E7F040C41DDAEFE9AA0F4AC18DE1112E1490 gpg: Good signature from "Simon Gaiser (Qubes Security Pack signing key)" [full] $ cd ../canaries/ $ gpg --verify canary-034-2023.txt.sig.marmarek canary-034-2023.txt gpg: Signature made Thu 02 Mar 2023 03:51:48 AM PST gpg: using RSA key 2D1771FE4D767EDC76B089FAD655A4F21830E06A gpg: Good signature from "Marek Marczykowski-Górecki (Qubes security pack)" [full] $ gpg --verify canary-034-2023.txt.sig.simon canary-034-2023.txt gpg: Signature made Thu 02 Mar 2023 01:47:52 AM PST gpg: using RSA key EA18E7F040C41DDAEFE9AA0F4AC18DE1112E1490 gpg: Good signature from "Simon Gaiser (Qubes Security Pack signing key)" [full] Again, the exact output will differ, but the final line of output from each `gpg --verify` command should always start with `gpg: Good signature from...` followed by an appropriate key. For this announcement (Qubes Canary 043), the commands are: $ gpg --verify canary-043-2025.txt.sig.marmarek canary-043-2025.txt $ gpg --verify canary-043-2025.txt.sig.simon canary-043-2025.txt You can also verify the signatures directly from this announcement in addition to or instead of verifying the files from the qubes-secpack. Simply copy and paste the Qubes Canary 043 text into a plain text file and do the same for both signature files. Then, perform the same authentication steps as listed above, substituting the filenames above with the names of the files you just created. https://www.qubes-os.org/news/2025/06/04/canary-043/