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| Vulnerability ID | VCID-9dpa-4r7v-aaac |
| Aliases |
CVE-2010-2063
|
| Summary | Buffer overflow in the SMB1 packet chaining implementation in the chain_reply function in process.c in smbd in Samba 3.0.x before 3.3.13 allows remote attackers to cause a denial of service (memory corruption and daemon crash) or possibly execute arbitrary code via a crafted field in a packet. |
| Status | Published |
| Exploitability | 2.0 |
| Weighted Severity | 9.0 |
| Risk | 10.0 |
| Affected and Fixed Packages | Package Details |
| Data source | Exploit-DB |
|---|---|
| Date added | Sept. 4, 2010 |
| Description | Samba 3.3.12 (Linux x86) - 'chain_reply' Memory Corruption (Metasploit) |
| Ransomware campaign use | Known |
| Source publication date | Sept. 4, 2010 |
| Exploit type | remote |
| Platform | linux_x86 |
| Source update date | Dec. 1, 2016 |
| Data source | Metasploit |
|---|---|
| Description | This exploits a memory corruption vulnerability present in Samba versions prior to 3.3.13. When handling chained response packets, Samba fails to validate the offset value used when building the next part. By setting this value to a number larger than the destination buffer size, an attacker can corrupt memory. Additionally, setting this value to a value smaller than 'smb_wct' (0x24) will cause the header of the input buffer chunk to be corrupted. After close inspection, it appears that 3.0.x versions of Samba are not exploitable. Since they use an "InputBuffer" size of 0x20441, an attacker cannot cause memory to be corrupted in an exploitable way. It is possible to corrupt the heap header of the "InputBuffer", but it didn't seem possible to get the chunk to be processed again prior to process exit. In order to gain code execution, this exploit attempts to overwrite a "talloc chunk" destructor function pointer. This particular module is capable of exploiting the flaw on x86 Linux systems that do not have the nx memory protection. NOTE: It is possible to make exploitation attempts indefinitely since Samba forks for user sessions in the default configuration. |
| Note | Stability: - crash-service-restarts SideEffects: - ioc-in-logs Reliability: - unreliable-session |
| Ransomware campaign use | Unknown |
| Source publication date | June 16, 2010 |
| Platform | Linux |
| Source URL | https://github.com/rapid7/metasploit-framework/tree/master/modules/exploits/linux/samba/chain_reply.rb |
| Attack Vector (AV) | Attack Complexity (AC) | Privileges Required (PR) | User Interaction (UI) | Scope (S) | Confidentiality Impact (C) | Integrity Impact (I) | Availability Impact (A) |
|---|---|---|---|---|---|---|---|
network adjacent_network local physical |
low high |
none low high |
none required |
unchanged changed |
high low none |
high low none |
high low none |
| Exploitability (E) | Access Vector (AV) | Access Complexity (AC) | Authentication (Au) | Confidentiality Impact (C) | Integrity Impact (I) | Availability Impact (A) |
|---|---|---|---|---|---|---|
high functional unproven proof_of_concept not_defined |
local adjacent_network network |
high medium low |
multiple single none |
none partial complete |
none partial complete |
none partial complete |
| Percentile | 0.99017 |
| EPSS Score | 0.79344 |
| Published At | June 12, 2025, 12:55 p.m. |
| Date | Actor | Action | Source | VulnerableCode Version |
|---|---|---|---|---|
| There are no relevant records. | ||||