Coder's unbounded memory allocation in provisioner file upload allows authenticated denial of service
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 2.34.2, 2.33.8, 2.32.7, 2.29.17
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
- Exploitation: none
- Automatable: no
- Technical impact: partial
Summary
Coder allows organizations to provision remote development environments via Terraform. Starting in version 2.24.0 and prior to versions 2.29.7, 2.32.7, 2.33.8, and 2.34.2, `NewDataBuilder` in `provisionersdk/proto/dataupload.go` allocated a byte slice using the client-supplied `FileSize` from a `DataUpload` message without an upper-bound check. Although the DRPC wire limit is 4 MiB, the `FileSize` value itself was unconstrained. The fix in versions 2.29.7, 2.32.7, 2.33.8, and 2.34.2 validates `FileSize` against an upper bound (`MaxFileSize = 100 MiB`) before allocation. As a workaround, restrict access to the provisioner daemon serve endpoint to trusted provisioner daemon service accounts.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: partial
- Record last updated
Affected versions
- coder coder
From 2.34.0 · fixed in 2.34.2; From 2.33.0 · fixed in 2.33.8; From 2.30.0 · fixed in 2.32.7; From 2.24.0 · fixed in 2.29.17
- github.com/coder/coder/v2Go
From 2.34.0 · fixed in 2.34.2
- github.com/coder/coder/v2Go
From 2.33.0 · fixed in 2.33.8
- github.com/coder/coder/v2Go
From 2.30.0 · fixed in 2.32.7
- github.com/coder/coder/v2Go
From 2.24.0 · fixed in 2.29.17
- github.com/coder/coderGo
All versions
- github.com/coder/coder/v2Go
From 2.24.0 · fixed in 2.29.17; From 2.30.0 · fixed in 2.32.7; From 2.33.0 · fixed in 2.33.8; From 2.34.0 · fixed in 2.34.2