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Advisory details: gitlab / pypi/vllm/CVE-2024-8939
Advisory ID gitlab/pypi/vllm/CVE-2024-8939
Aliases CVE-2024-8939
GHSA-wc36-9694-f9rf
Summary vLLM Denial of Service via the best_of parameter A vulnerability was found in the ilab model serve component, where improper handling of the best_of parameter in the vllm JSON web API can lead to a Denial of Service (DoS). The API used for LLM-based sentence or chat completion accepts a best_of parameter to return the best completion from several options. When this parameter is set to a large value, the API does not handle timeouts or resource exhaustion properly, allowing an attacker to cause a DoS by consuming excessive system resources. This leads to the API becoming unresponsive, preventing legitimate users from accessing the service.
Status Published
Exploitability 0.5
Weighted Severity 0.0
Risk
Affected and Fixed Packages Package Details
Introduced and Fixed Package Commit Patches Package Commit Patches Details
Weaknesses (3)
CWE-400 Uncontrolled Resource Consumption
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
cvssv3.1 https://gitlab.com/gitlab-org/advisories-community/-/blob/main/pypi/vllm/CVE-2024-8939.yml
Reference id Reference type URL
https://bugzilla.redhat.com/show_bug.cgi?id=2312782
https://github.com/vllm-project/vllm
https://github.com/vllm-project/vllm/issues/6137
CVE-2024-8939 https://access.redhat.com/security/cve/CVE-2024-8939
CVE-2024-8939 https://nvd.nist.gov/vuln/detail/CVE-2024-8939
GHSA-wc36-9694-f9rf https://github.com/advisories/GHSA-wc36-9694-f9rf
No exploits are available.

No EPSS data available for this advisory.

Patch URL
There are no known patches.
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://gitlab.com/gitlab-org/advisories-community/-/blob/main/pypi/vllm/CVE-2024-8939.yml
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

Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2024-09-17T19:51:11Z/

Decision: Track

Source URL: https://github.com/cisagov/vulnrichment/blob/develop/2024/8xxx/CVE-2024-8939.json

Source Advisory: vulnrichment/CVE-2024-8939

View SSVC decision tree 
[{'Exploitation': 'none'},
 {'Automatable': 'no'},
 {'Technical Impact': 'partial'},
 {'Mission Prevalence': 'minimal'},
 {'Public Well-being Impact': 'material'},
 {'Mission & Well-being': 'medium'}]