CVE-2024-0853

OCSP verification bypass with TLS session reuse

MEDIUM
5.3
CVSS Score
Published: February 3, 2024 at 01:35 PM UTC
Updated: June 17, 2026 at 06:54 AM UTC
1 product affected across 1 vendorCurl

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Severity
MEDIUM5.3
Exploit prediction
EPSS 1%
SSVC
PoC

Description

curl inadvertently kept the SSL session ID for connections in its cache even when the verify status (*OCSP stapling*) test failed. A subsequent transfer to the same hostname could then succeed if the session ID cache was still fresh, which then skipped the verify status check.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (6)

Vendor Advisory
Source: 2499f714-1537-4658-8207-48ae4bb9eae9
https://curl.se/docs/CVE-2024-0853.html
Vendor Advisory
Source: 2499f714-1537-4658-8207-48ae4bb9eae9
https://curl.se/docs/CVE-2024-0853.json
ExploitIssue Tracking
Source: 2499f714-1537-4658-8207-48ae4bb9eae9
https://hackerone.com/reports/2298922
Source: 2499f714-1537-4658-8207-48ae4bb9eae9
https://security.netapp.com/advisory/ntap-20240307-0004/
Source: 2499f714-1537-4658-8207-48ae4bb9eae9
https://security.netapp.com/advisory/ntap-20240426-0009/
Source: 2499f714-1537-4658-8207-48ae4bb9eae9
https://security.netapp.com/advisory/ntap-20240503-0012/

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.3MEDIUMCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-295

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