Cookie expiration bypass via unchecked date arithmetic
Published May 19, 2025 · Updated Jun 30, 2026
Integer overflow in GNOME libsoup 3.6.5 and earlier allows remote attackers to bypass cookie expiration via a crafted Expires value. The cookie date parser accepts out-of-range day, year, hour, minute, and second integers and uses them in date arithmetic without value checks. Exploitation requires a malicious or compromised HTTP server to supply the cookie and affects only cookie lifetime handling in the client instance.
Summary
What happened
Integer overflow in GNOME libsoup 3.6.5 and earlier allows remote attackers to bypass cookie expiration via a crafted Expires value. The cookie date parser accepts out-of-range day, year, hour, minute, and second integers and uses them in date arithmetic without value checks. Exploitation requires a malicious or compromised HTTP server to supply the cookie and affects only cookie lifetime handling in the client instance.
The record
- CVE
- CVE-2025-4945
- Published
- May 19, 2025
- Updated
- Jun 30, 2026
- Vendor
- 389 Directory Server
- Product
- Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions
- Classifications
- CWE-190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 19, 2025CVE publishedPublication date reported by the CVE source.
- Jun 30, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
- GNOME libsoup issue 448 proof of conceptproof of concept · unverified
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Technologies
Your stack
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Your stack
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