Reliable Datagram Sockets
Reliable Datagram Sockets (RDS) is a high-performance, low-latency, reliable, connectionless protocol for delivering datagrams. It is developed by Oracle Corporation. It was included in the Linux kernel 2.6.30 which was released on 9 June 2009. The code was contributed by the OpenFabrics Alliance (OFA). On October 19, 2010, VSR announced CVE-2010-3904, a vulnerability within the Linux 2.6.30 kernel which could result in a local privilege escalation via the kernel's implementation of RDS. This was subsequently fixed in Linux 2.6.36. On May 8, 2019, CVE-2019-11815 was published, regarding a race condition in the Linux RDS implementation that could lead to a use-after-free bug and possible arbitrary code execution. The bug has been fixed in Linux 5.0.8.
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| Communication protocol | |
| Abbreviation | RDS |
|---|---|
| Developer(s) | Oracle Corporation |
| Introduction | June 9, 2009 |
| OSI layer | Transport layer |
| Port(s) | 16385 (RDS-over-TCP) |
| Internet protocol suite |
|---|
| Application layer |
| Transport layer |
| Internet layer |
| Link layer |
Reliable Datagram Sockets (RDS) is a high-performance, low-latency, reliable, connectionless protocol for delivering datagrams. It is developed by Oracle Corporation.
It was included in the Linux kernel 2.6.30 which was released on 9 June 2009. The code was contributed by the OpenFabrics Alliance (OFA).[1]
On October 19, 2010, VSR announced CVE-2010-3904, a vulnerability within the Linux 2.6.30 kernel which could result in a local privilege escalation via the kernel's implementation of RDS.[2] This was subsequently fixed in Linux 2.6.36.[3]
On May 8, 2019, CVE-2019-11815 was published, regarding a race condition in the Linux RDS implementation that could lead to a use-after-free bug and possible arbitrary code execution.[4] The bug has been fixed in Linux 5.0.8.
Header
[edit]| Size (bits) | Name | Description |
|---|---|---|
| be64 | h_sequence | Sequence number |
| be64 | h_ack | Sequence number of last received message |
| be32 | h_len | Length of the message payload |
| be16 | h_sport | Port on source node |
| be16 | h_dport | Port on destination node |
| 8 | h_flags | Described below |
| 8 | h_credit | Credits given (used for credit-based flow control) |
| 32 | h_padding | Padding for 64-bit struct alignment |
| 16 | h_csum | 1's complement header checksum |
| 128 | h_exthdr | Optional extension header space |
| Offset | Octet | 0 | 1 | 2 | 3 | ||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Octet | Bit | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 |
| 0 | 0 | h_sequence | |||||||||||||||||||||||||||||||
| 4 | 32 | ||||||||||||||||||||||||||||||||
| 8 | 64 | h_ack | |||||||||||||||||||||||||||||||
| 12 | 96 | ||||||||||||||||||||||||||||||||
| 16 | 128 | h_len | |||||||||||||||||||||||||||||||
| 20 | 160 | h_sport | h_dport | ||||||||||||||||||||||||||||||
| 24 | 192 | h_flags | h_credit | h_padding…↴ | |||||||||||||||||||||||||||||
| 26 | 208 | ↪…h_padding | h_csum | ||||||||||||||||||||||||||||||
| 32 | 256 | h_exthdr | |||||||||||||||||||||||||||||||
| 36 | 288 | ||||||||||||||||||||||||||||||||
| 40 | 320 | ||||||||||||||||||||||||||||||||
| 44 | 352 | ||||||||||||||||||||||||||||||||
- Sequence (h_sequence): 64 bits
- The sequence number.
- Acknowledge (h_ack): 64 bits
- The sequence number of last received message.
- Length (h_len): 32 bits
- The length of the message payload.
- Source Port (h_sport): 16 bits
- Identifies the sending port.
- Destination Port (h_dport): 16 bits
- Identifies the receiving port.
- Flags (h_flags): 8 bits
- Described below.
- Credits (h_credit): 8 bits
- Credits given (used for credit-based flow control).
- Padding (h_padding): 32 bits
- Padding for 64-bit struct alignment.
- Checksum (h_csum): 16 bits
- 1's complement header checksum.
- Extension Header (h_exthdr): 128 bits
- Optional extension header space.
See also
[edit]References
[edit]- ^ "Linux 2 6 30 - Linux Kernel Newbies". Kernelnewbies.org. 2009-06-12. Archived from the original on 2012-04-02. Retrieved 2015-10-11.
- ^ "VSR Security Advisory : Product Description". Vsecurity.com. Archived from the original on 2022-12-04. Retrieved 2015-10-11.
- ^ "CVE-2010-3904". NIST National Vulnerability Database. Archived from the original on 2020-12-21. Retrieved 2020-12-27.
- ^ "NVD - CVE-2019-11815". nvd.nist.gov. Retrieved 2019-05-14.
External links
[edit]- Oss.oracle.com Archived 2023-02-03 at the Wayback Machine
- Oss.oracle.com Archived 2021-02-28 at the Wayback Machine
- https://oss.oracle.com/projects/rds/dist/documentation/rds-3.1-spec.html
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