3 Commits (a627fb6aa12ac5ff93dc18d8a53650181ae8f818)

Author	SHA1	Message	Date
renovate[bot]	a627fb6aa1	chore(deps): update module golang.org/x/crypto to v0.17.0 [security] (main) (#11522) ... [](https://renovatebot.com) This PR contains the following updates: | Package | Change | Age | Adoption | Passing | Confidence | |---|---|---|---|---|---| | golang.org/x/crypto | `v0.14.0` -> `v0.17.0` | [](https://docs.renovatebot.com/merge-confidence/) | [](https://docs.renovatebot.com/merge-confidence/) | [](https://docs.renovatebot.com/merge-confidence/) | [](https://docs.renovatebot.com/merge-confidence/) | ### GitHub Vulnerability Alerts #### [CVE-2023-48795](https://togithub.com/warp-tech/russh/security/advisories/GHSA-45x7-px36-x8w8) ### Summary Terrapin is a prefix truncation attack targeting the SSH protocol. More precisely, Terrapin breaks the integrity of SSH's secure channel. By carefully adjusting the sequence numbers during the handshake, an attacker can remove an arbitrary amount of messages sent by the client or server at the beginning of the secure channel without the client or server noticing it. ### Mitigations To mitigate this protocol vulnerability, OpenSSH suggested a so-called "strict kex" which alters the SSH handshake to ensure a Man-in-the-Middle attacker cannot introduce unauthenticated messages as well as convey sequence number manipulation across handshakes. **Warning: To take effect, both the client and server must support this countermeasure.** As a stop-gap measure, peers may also (temporarily) disable the affected algorithms and use unaffected alternatives like AES-GCM instead until patches are available. ### Details The SSH specifications of ChaCha20-Poly1305 (chacha20-poly1305@&#8203;openssh.com) and Encrypt-then-MAC (*-etm@openssh.com MACs) are vulnerable against an arbitrary prefix truncation attack (a.k.a. Terrapin attack). This allows for an extension negotiation downgrade by stripping the SSH_MSG_EXT_INFO sent after the first message after SSH_MSG_NEWKEYS, downgrading security, and disabling attack countermeasures in some versions of OpenSSH. When targeting Encrypt-then-MAC, this attack requires the use of a CBC cipher to be practically exploitable due to the internal workings of the cipher mode. Additionally, this novel attack technique can be used to exploit previously unexploitable implementation flaws in a Man-in-the-Middle scenario. The attack works by an attacker injecting an arbitrary number of SSH_MSG_IGNORE messages during the initial key exchange and consequently removing the same number of messages just after the initial key exchange has concluded. This is possible due to missing authentication of the excess SSH_MSG_IGNORE messages and the fact that the implicit sequence numbers used within the SSH protocol are only checked after the initial key exchange. In the case of ChaCha20-Poly1305, the attack is guaranteed to work on every connection as this cipher does not maintain an internal state other than the message's sequence number. In the case of Encrypt-Then-MAC, practical exploitation requires the use of a CBC cipher; while theoretical integrity is broken for all ciphers when using this mode, message processing will fail at the application layer for CTR and stream ciphers. For more details see [https://terrapin-attack.com](https://terrapin-attack.com). ### Impact This attack targets the specification of ChaCha20-Poly1305 (chacha20-poly1305@&#8203;openssh.com) and Encrypt-then-MAC (*-etm@openssh.com), which are widely adopted by well-known SSH implementations and can be considered de-facto standard. These algorithms can be practically exploited; however, in the case of Encrypt-Then-MAC, we additionally require the use of a CBC cipher. As a consequence, this attack works against all well-behaving SSH implementations supporting either of those algorithms and can be used to downgrade (but not fully strip) connection security in case SSH extension negotiation (RFC8308) is supported. The attack may also enable attackers to exploit certain implementation flaws in a man-in-the-middle (MitM) scenario. --- ### Configuration 📅 **Schedule**: Branch creation - "" (UTC), Automerge - At any time (no schedule defined). 🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied. ♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox. 🔕 **Ignore**: Close this PR and you won't be reminded about these updates again. --- - [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check this box --- This PR has been generated by [Mend Renovate](https://www.mend.io/free-developer-tools/renovate/). View repository job log [here](https://developer.mend.io/github/grafana/loki). <!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzNy45My4xIiwidXBkYXRlZEluVmVyIjoiMzcuMTM1LjAiLCJ0YXJnZXRCcmFuY2giOiJtYWluIn0=--> Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>	1 year ago
Owen Diehl	d88f3996ea	revendor compatibility: various prom+k8s+cortex (#3664) ... * revendor compatibility: various prom+k8s+cortex * fix logcli client instantiation * go mod tidy	4 years ago
Peter Štibraný	e60164bef6	Convert Loki modules to services (#1804) ... * Loki now uses module services to start and stop its work. Signed-off-by: Peter Štibraný <peter.stibrany@grafana.com> * Use services methods to initialize some components. Signed-off-by: Peter Štibraný <peter.stibrany@grafana.com> * Use Cortex' NewModuleService. Signed-off-by: Peter Štibraný <peter.stibrany@grafana.com> * Converted server to a service. Signed-off-by: Peter Štibraný <peter.stibrany@grafana.com> * Converted distributor to service. Signed-off-by: Peter Štibraný <peter.stibrany@grafana.com> * Use table manager service Signed-off-by: Peter Štibraný <peter.stibrany@grafana.com> * querier service Signed-off-by: Peter Štibraný <peter.stibrany@grafana.com> * query-frontend service Signed-off-by: Peter Štibraný <peter.stibrany@grafana.com> * Merged stopping method into shutdown Signed-off-by: Peter Štibraný <peter.stibrany@grafana.com> * Converted ingester to a service. It now starts all background tasks in Starting state. Stopping needs little work, as does reacting on lifecycler errors. Signed-off-by: Peter Štibraný <peter.stibrany@grafana.com> * Loki Signed-off-by: Peter Štibraný <peter.stibrany@grafana.com> * If lifecycler fails, ingester fails too. It now doesn't call os.Exit, but shuts down gracefully and enters Failed state. That triggers Loki to shutdown completely. Signed-off-by: Peter Štibraný <peter.stibrany@grafana.com> * Ignore ErrStopProcess errors from services This is a signal that Loki should stop. Signed-off-by: Peter Štibraný <peter.stibrany@grafana.com> * Use single /ready handler It checks the state of all services, and asks ingester for its own check as well. Signed-off-by: Peter Štibraný <peter.stibrany@grafana.com> * Removed unused value. Signed-off-by: Peter Štibraný <peter.stibrany@grafana.com> * Lint Signed-off-by: Peter Štibraný <peter.stibrany@grafana.com> * Fix test. Signed-off-by: Peter Štibraný <peter.stibrany@grafana.com> * Go mod tidy, vendor Signed-off-by: Peter Štibraný <peter.stibrany@grafana.com> * Tailers, not trailers. Signed-off-by: Peter Štibraný <peter.stibrany@grafana.com> * Adds return for the healtcheck in case of error. Signed-off-by: Cyril Tovena <cyril.tovena@gmail.com> Co-authored-by: Cyril Tovena <cyril.tovena@gmail.com>	5 years ago