Unverified Paths can Cause Excessive Use of System Resources

Weakness Type (CWE)

CWE-770 — CWE-770 Allocation of Resources Without Limits or Throttling

CAPEC

CVSS 4.0 Score

5.3

MEDIUM

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

Vulnerability description

Allocation of Resources Without Limits or Throttling vulnerability in Erlang OTP ssh (ssh_sftp modules) allows Excessive Allocation, Resource Leak Exposure.

This vulnerability is associated with program files lib/ssh/src/ssh_sftpd.erl.

This issue affects OTP form OTP 17.0 until OTP 28.0.3, OTP 27.3.4.3 and 26.2.5.15 corresponding to ssh from 3.0.1 until 5.3.3, 5.2.11.3 and 5.1.4.12.

Affected

Erlang / OTP » `ssh_sftp`

Module	Source File
`ssh_sftp`	`lib/ssh/src/ssh_sftpd.erl`

Status	Version	Changes / Fixed in
affected	`pkg:otp/ssh@3.0.1`	unaffected at `pkg:otp/ssh@5.3.3` unaffected at `pkg:otp/ssh@5.2.11.3` unaffected at `pkg:otp/ssh@5.1.4.12`
affected	`17.0`	unaffected at `28.0.3` unaffected at `27.3.4.3` unaffected at `26.2.5.15`
affected	`07b8f441ca711f9812fad9e9115bab3c3aa92f79`	unaffected at `c242e6458967e9514bea351814151695807a54ac` unaffected at `043ee3c943e2977c1acdd740ad13992fd60b6bf0`

Workarounds

Disable sftp
limiting number of max_sessions allowed for sshd, so exploiting becomes more complicated

References

https://github.com/erlang/otp/security/advisories/GHSA-rr5p-6856-j7h8 vendor-advisory
https://www.erlang.org/doc/system/versions.html#order-of-versions x_version-scheme
https://github.com/erlang/otp/pull/10155 patch
https://github.com/erlang/otp/commit/c242e6458967e9514bea351814151695807a54ac patch
https://github.com/erlang/otp/commit/043ee3c943e2977c1acdd740ad13992fd60b6bf0 patch

Credits

Remediation developer: Jakub Witczak
Remediation reviewer: Ingela Andin

CVE record as JSON: GET /cves/cve-2025-48039.json