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Log IP on SSH authentication failure for Built-in SSH server (#13150)
* Log IP on SSH authentication failure fixes https://github.com/go-gitea/gitea/issues/13094 * include string 'Failed authentication attempt' in error * update fail2ban docs also match failed authentication over command line * better logging of authentication errors with IP addresses * format ... Co-authored-by: techknowlogick <techknowlogick@gitea.io> Co-authored-by: 6543 <6543@obermui.de>
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@ -20,18 +20,24 @@ sure to test this before relying on it so you don't lock yourself out.**
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Gitea returns an HTTP 200 for bad logins in the web logs, but if you have logging options on in
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`app.ini`, then you should be able to go off of `log/gitea.log`, which gives you something like this
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on a bad authentication:
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on a bad authentication from the web or CLI using SSH or HTTP respectively:
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```log
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2018/04/26 18:15:54 [I] Failed authentication attempt for user from xxx.xxx.xxx.xxx
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```
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```log
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2020/10/15 16:05:09 modules/ssh/ssh.go:188:publicKeyHandler() [E] SearchPublicKeyByContent: public key does not exist [id: 0] Failed authentication attempt from xxx.xxx.xxx.xxx
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```
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```log
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2020/10/15 16:08:44 ...s/context/context.go:204:HandleText() [E] invalid credentials from xxx.xxx.xxx.xxx
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```
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Add our filter in `/etc/fail2ban/filter.d/gitea.conf`:
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```ini
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# gitea.conf
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[Definition]
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failregex = .*Failed authentication attempt for .* from <HOST>
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failregex = .*(Failed authentication attempt|invalid credentials|Attempted access of unknown user).* from <HOST>
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ignoreregex =
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```
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@ -186,7 +186,7 @@ func publicKeyHandler(ctx ssh.Context, key ssh.PublicKey) bool {
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pkey, err := models.SearchPublicKeyByContent(strings.TrimSpace(string(gossh.MarshalAuthorizedKey(key))))
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if err != nil {
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log.Error("SearchPublicKeyByContent: %v", err)
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log.Error("SearchPublicKeyByContent: %v Failed authentication attempt from %s", err, ctx.RemoteAddr())
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return false
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}
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@ -132,6 +132,7 @@ func ServCommand(ctx *macaron.Context) {
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for _, verb := range ctx.QueryStrings("verb") {
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if "git-upload-pack" == verb {
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// User is fetching/cloning a non-existent repository
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log.Error("Failed authentication attempt (cannot find repository: %s/%s) from %s", results.OwnerName, results.RepoName, ctx.RemoteAddr())
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ctx.JSON(http.StatusNotFound, map[string]interface{}{
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"results": results,
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"type": "ErrRepoNotExist",
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@ -317,6 +318,7 @@ func ServCommand(ctx *macaron.Context) {
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userMode := perm.UnitAccessMode(unitType)
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if userMode < mode {
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log.Error("Failed authentication attempt for %s with key %s (not authorized to %s %s/%s) from %s", user.Name, key.Name, modeString, ownerName, repoName, ctx.RemoteAddr())
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ctx.JSON(http.StatusUnauthorized, map[string]interface{}{
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"results": results,
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"type": "ErrUnauthorized",
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@ -102,6 +102,7 @@ func HTTP(ctx *context.Context) {
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owner, err := models.GetUserByName(username)
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if err != nil {
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log.Error("Attempted access of unknown user from %s", ctx.RemoteAddr())
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ctx.NotFoundOrServerError("GetUserByName", models.IsErrUserNotExist, err)
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return
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}
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