AWS AmazonS3 documentation change
Summary
Added 'Source region' field to S3 access logs and updated log examples to include this new field. Modified a compute checksum log example by replacing IP with '-' and adding extra fields.
Security assessment
The change introduces documentation for a new 'Source region' field in S3 access logs, which enhances security auditing capabilities by providing request origin information. However, there's no evidence this addresses a specific vulnerability or incident. The IP replacement in the checksum example appears to be a data anonymization improvement for documentation clarity.
Diff
diff --git a/AmazonS3/latest/userguide/LogFormat.md b/AmazonS3/latest/userguide/LogFormat.md index 453537875..aebf4bc91 100644 --- a//AmazonS3/latest/userguide/LogFormat.md +++ b//AmazonS3/latest/userguide/LogFormat.md @@ -31,5 +31,5 @@ Any field can be set to `-` to indicate that the data was unknown or unavailable - 79a59df900b949e55d96a1e698fbacedfd6e09d98eacf8f8d5218e7cd47ef2be amzn-s3-demo-bucket1 [06/Feb/2019:00:00:38 +0000] 192.0.2.3 79a59df900b949e55d96a1e698fbacedfd6e09d98eacf8f8d5218e7cd47ef2be 3E57427F3EXAMPLE REST.GET.VERSIONING - "GET /amzn-s3-demo-bucket1?versioning HTTP/1.1" 200 - 113 - 7 - "-" "S3Console/0.4" - s9lzHYrFp76ZVxRcpX9+5cjAnEH2ROuNkd2BHfIa6UkFVdtjf5mKR3/eTPFvsiP/XV/VLi31234= SigV4 ECDHE-RSA-AES128-GCM-SHA256 AuthHeader amzn-s3-demo-bucket1.s3.us-west-1.amazonaws.com TLSV1.2 arn:aws:s3:us-west-1:123456789012:accesspoint/example-AP Yes - 79a59df900b949e55d96a1e698fbacedfd6e09d98eacf8f8d5218e7cd47ef2be amzn-s3-demo-bucket1 [06/Feb/2019:00:00:38 +0000] 192.0.2.3 79a59df900b949e55d96a1e698fbacedfd6e09d98eacf8f8d5218e7cd47ef2be 891CE47D2EXAMPLE REST.GET.LOGGING_STATUS - "GET /amzn-s3-demo-bucket1?logging HTTP/1.1" 200 - 242 - 11 - "-" "S3Console/0.4" - 9vKBE6vMhrNiWHZmb2L0mXOcqPGzQOI5XLnCtZNPxev+Hf+7tpT6sxDwDty4LHBUOZJG96N1234= SigV4 ECDHE-RSA-AES128-GCM-SHA256 AuthHeader amzn-s3-demo-bucket1.s3.us-west-1.amazonaws.com TLSV1.2 - - - 79a59df900b949e55d96a1e698fbacedfd6e09d98eacf8f8d5218e7cd47ef2be amzn-s3-demo-bucket1 [06/Feb/2019:00:00:38 +0000] 192.0.2.3 79a59df900b949e55d96a1e698fbacedfd6e09d98eacf8f8d5218e7cd47ef2be A1206F460EXAMPLE REST.GET.BUCKETPOLICY - "GET /amzn-s3-demo-bucket1?policy HTTP/1.1" 404 NoSuchBucketPolicy 297 - 38 - "-" "S3Console/0.4" - BNaBsXZQQDbssi6xMBdBU2sLt+Yf5kZDmeBUP35sFoKa3sLLeMC78iwEIWxs99CRUrbS4n11234= SigV4 ECDHE-RSA-AES128-GCM-SHA256 AuthHeader amzn-s3-demo-bucket1.s3.us-west-1.amazonaws.com TLSV1.2 - Yes - 79a59df900b949e55d96a1e698fbacedfd6e09d98eacf8f8d5218e7cd47ef2be amzn-s3-demo-bucket1 [06/Feb/2019:00:01:00 +0000] 192.0.2.3 79a59df900b949e55d96a1e698fbacedfd6e09d98eacf8f8d5218e7cd47ef2be 7B4A0FABBEXAMPLE REST.GET.VERSIONING - "GET /amzn-s3-demo-bucket1?versioning HTTP/1.1" 200 - 113 - 33 - "-" "S3Console/0.4" - Ke1bUcazaN1jWuUlPJaxF64cQVpUEhoZKEG/hmy/gijN/I1DeWqDfFvnpybfEseEME/u7ME1234= SigV4 ECDHE-RSA-AES128-GCM-SHA256 AuthHeader amzn-s3-demo-bucket1.s3.us-west-1.amazonaws.com TLSV1.2 - - - 79a59df900b949e55d96a1e698fbacedfd6e09d98eacf8f8d5218e7cd47ef2be amzn-s3-demo-bucket1 [06/Feb/2019:00:01:57 +0000] 192.0.2.3 79a59df900b949e55d96a1e698fbacedfd6e09d98eacf8f8d5218e7cd47ef2be DD6CC733AEXAMPLE REST.PUT.OBJECT s3-dg.pdf "PUT /amzn-s3-demo-bucket1/s3-dg.pdf HTTP/1.1" 200 - - 4406583 41754 28 "-" "S3Console/0.4" - 10S62Zv81kBW7BB6SX4XJ48o6kpcl6LPwEoizZQQxJd5qDSCTLX0TgS37kYUBKQW3+bPdrg1234= SigV4 ECDHE-RSA-AES128-SHA AuthHeader amzn-s3-demo-bucket1.s3.us-west-1.amazonaws.com TLSV1.2 - Yes + 79a59df900b949e55d96a1e698fbacedfd6e09d98eacf8f8d5218e7cd47ef2be amzn-s3-demo-bucket1 [06/Feb/2019:00:00:38 +0000] 192.0.2.3 79a59df900b949e55d96a1e698fbacedfd6e09d98eacf8f8d5218e7cd47ef2be 3E57427F3EXAMPLE REST.GET.VERSIONING - "GET /amzn-s3-demo-bucket1?versioning HTTP/1.1" 200 - 113 - 7 - "-" "S3Console/0.4" - s9lzHYrFp76ZVxRcpX9+5cjAnEH2ROuNkd2BHfIa6UkFVdtjf5mKR3/eTPFvsiP/XV/VLi31234= SigV4 ECDHE-RSA-AES128-GCM-SHA256 AuthHeader amzn-s3-demo-bucket1.s3.us-west-1.amazonaws.com TLSV1.2 arn:aws:s3:us-west-1:123456789012:accesspoint/example-AP Yes us-east-1 + 79a59df900b949e55d96a1e698fbacedfd6e09d98eacf8f8d5218e7cd47ef2be amzn-s3-demo-bucket1 [06/Feb/2019:00:00:38 +0000] 192.0.2.3 79a59df900b949e55d96a1e698fbacedfd6e09d98eacf8f8d5218e7cd47ef2be 891CE47D2EXAMPLE REST.GET.LOGGING_STATUS - "GET /amzn-s3-demo-bucket1?logging HTTP/1.1" 200 - 242 - 11 - "-" "S3Console/0.4" - 9vKBE6vMhrNiWHZmb2L0mXOcqPGzQOI5XLnCtZNPxev+Hf+7tpT6sxDwDty4LHBUOZJG96N1234= SigV4 ECDHE-RSA-AES128-GCM-SHA256 AuthHeader amzn-s3-demo-bucket1.s3.us-west-1.amazonaws.com TLSV1.2 - - us-east-1 + 79a59df900b949e55d96a1e698fbacedfd6e09d98eacf8f8d5218e7cd47ef2be amzn-s3-demo-bucket1 [06/Feb/2019:00:00:38 +0000] 192.0.2.3 79a59df900b949e55d96a1e698fbacedfd6e09d98eacf8f8d5218e7cd47ef2be A1206F460EXAMPLE REST.GET.BUCKETPOLICY - "GET /amzn-s3-demo-bucket1?policy HTTP/1.1" 404 NoSuchBucketPolicy 297 - 38 - "-" "S3Console/0.4" - BNaBsXZQQDbssi6xMBdBU2sLt+Yf5kZDmeBUP35sFoKa3sLLeMC78iwEIWxs99CRUrbS4n11234= SigV4 ECDHE-RSA-AES128-GCM-SHA256 AuthHeader amzn-s3-demo-bucket1.s3.us-west-1.amazonaws.com TLSV1.2 - Yes us-east-1 + 79a59df900b949e55d96a1e698fbacedfd6e09d98eacf8f8d5218e7cd47ef2be amzn-s3-demo-bucket1 [06/Feb/2019:00:01:00 +0000] 192.0.2.3 79a59df900b949e55d96a1e698fbacedfd6e09d98eacf8f8d5218e7cd47ef2be 7B4A0FABBEXAMPLE REST.GET.VERSIONING - "GET /amzn-s3-demo-bucket1?versioning HTTP/1.1" 200 - 113 - 33 - "-" "S3Console/0.4" - Ke1bUcazaN1jWuUlPJaxF64cQVpUEhoZKEG/hmy/gijN/I1DeWqDfFvnpybfEseEME/u7ME1234= SigV4 ECDHE-RSA-AES128-GCM-SHA256 AuthHeader amzn-s3-demo-bucket1.s3.us-west-1.amazonaws.com TLSV1.2 - - us-east-1 + 79a59df900b949e55d96a1e698fbacedfd6e09d98eacf8f8d5218e7cd47ef2be amzn-s3-demo-bucket1 [06/Feb/2019:00:01:57 +0000] 192.0.2.3 79a59df900b949e55d96a1e698fbacedfd6e09d98eacf8f8d5218e7cd47ef2be DD6CC733AEXAMPLE REST.PUT.OBJECT s3-dg.pdf "PUT /amzn-s3-demo-bucket1/s3-dg.pdf HTTP/1.1" 200 - - 4406583 41754 28 "-" "S3Console/0.4" - 10S62Zv81kBW7BB6SX4XJ48o6kpcl6LPwEoizZQQxJd5qDSCTLX0TgS37kYUBKQW3+bPdrg1234= SigV4 ECDHE-RSA-AES128-SHA AuthHeader amzn-s3-demo-bucket1.s3.us-west-1.amazonaws.com TLSV1.2 - Yes us-east-1 @@ -40 +40 @@ The following is an example log record for the **Compute checksum** operation: - 7cd47ef2be amzn-s3-demo-bucket [06/Feb/2019:00:00:38 +0000] 192.0.2.3 79a59df900b949e55d96a1e698fbacedfd6e09d98eacf8f8d5218e7cd47ef2be e5042925-b524-4b3b-a869-f3881e78ff3a S3.COMPUTE.OBJECT.CHECKSUM example-object - - - - 1048576 - - - - -bPf7qjG4XwYdPgDQTl72GW/uotRhdPz2UryEyAFLDSRmKrakUkJCYLtAw6fdANcrsUYc1M/kIulXM1u5vZQT5g== - - - - - - + 7cd47ef2be amzn-s3-demo-bucket [06/Feb/2019:00:00:38 +0000] - 79a59df900b949e55d96a1e698fbacedfd6e09d98eacf8f8d5218e7cd47ef2be e5042925-b524-4b3b-a869-f3881e78ff3a S3.COMPUTE.OBJECT.CHECKSUM example-object - - - - 1048576 - - - - - bPf7qjG4XwYdPgDQTl72GW/uotRhdPz2UryEyAFLDSRmKrakUkJCYLtAw6fdANcrsUYc1M/kIulXM1u5vZQT5g== - - - - - - - - @@ -328,0 +329,10 @@ A string that indicates whether the request required an access control list (ACL +**Source region** + + +The AWS Region from which the request originated. This field shows a dash (`-`) when the origin region cannot be determined (such as PrivateLink connections, Direct Connect connections, Bring your own IP addresses (BYOIP), or non-AWS IP addresses) or when the log is generated by operations triggered based on customer-set policies or actions, such as lifecycle and checksum. + +**Example entry** + + + us-east-1 + @@ -601,0 +612,10 @@ A string that indicates whether the request required an access control list (ACL +**Source region** + + +The AWS Region from which the request originated. This field shows a dash (`-`) when the origin region cannot be determined (such as PrivateLink connections, Direct Connect connections, Bring your own IP addresses (BYOIP), or non-AWS IP addresses) or when the log is generated by operations triggered based on customer-set policies or actions, such as lifecycle and checksum. + +**Example entry** + + + us-east-1 +