BIOS memory disclosure via R2T integer overflow
Published Mar 14, 2025 · Updated Mar 18, 2025
Integer overflow in TianoCore EDK II NetworkPkg through edk2-stable202502 allows remote attackers to disclose BIOS memory via crafted R2T PDUs. IScsiOnR2TRcvd adds two attacker-controlled 32-bit header values without an overflow check, allowing a wrapped sum to pass bounds validation and advance the output-data pointer beyond its buffer. Exploitation requires control of the configured iSCSI target and user interaction; exposed memory is returned in Data-Out PDUs, while the CNA also reports service interruption.
Summary
What happened
Integer overflow in TianoCore EDK II NetworkPkg through edk2-stable202502 allows remote attackers to disclose BIOS memory via crafted R2T PDUs. IScsiOnR2TRcvd adds two attacker-controlled 32-bit header values without an overflow check, allowing a wrapped sum to pass bounds validation and advance the output-data pointer beyond its buffer. Exploitation requires control of the configured iSCSI target and user interaction; exposed memory is returned in Data-Out PDUs, while the CNA also reports service interruption.
The record
- CVE
- CVE-2025-2295
- Published
- Mar 14, 2025
- Updated
- Mar 18, 2025
- Vendor
- TianoCore
- Product
- EDK II
- Classifications
- CWE-190
- Attack vector
- network
- Privileges
- admin
Timeline
How it unfolded
- Mar 14, 2025CVE publishedPublication date reported by the CVE source.
- Mar 18, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <=edk2-stable202502
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
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo