Buffer overflow in BlockIo service for EDK II may allow an unauthenticated user to potentially enable escalation of privilege, information d
Noroxi assessment
Priority: Monitor (action score 36/100)
- The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
- Probability of exploitation in the next 30 days: 2.2% (FIRST EPSS); higher than 82.4% of all records.
- Anyone who can reach it over the internet can trigger it. No account or password is required. A user must open a link or visit a page. No special conditions are required; it is repeatable.
- Fixed version: edk2 (Debian:12) 0~20181115.85588389-3; ovmf (openSUSE:Leap 15.0) 2017+git1510945757.b2662641d5-lp150.4.13.1; ovmf (openSUSE:Tumbleweed) 202105-3.4.
Low priority for now. Upgrade to edk2 (Debian:12) 0~20181115.85588389-3; ovmf (openSUSE:Leap 15.0) 2017+git1510945757.b2662641d5-lp150.4.13.1; ovmf (openSUSE:Tumbleweed) 202105-3.4 or later.
Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it
Buffer overflow in BlockIo service for EDK II may allow an unauthenticated user to potentially enable escalation of privilege, information disclosure and/or denial of service via network access.
- Published
- Mar 27, 2019
- Updated
- Jun 16, 2026
- EPSS
- 2.3% · 82th percentile
- CWE
- CWE-787
Report tools
Action score
36
Monitor
Low priority for now.
- CVSS
- 35 / 40 · 8.8 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 1 / 30 · 2.3%
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- No public exploit code on record
- A fix has been released
If any of these changes, we'll tell you in the daily email digest.
Running WordPress? Scan your site free with WP Lens
Noroxi analysis
What does it mean in your environment?
The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.
We use this product, ask for helpAffected systems
Is your version affected?
Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- opensuse leap15.0
- tianocore edk iiall versions
Versions reported by the vendor
Affected version ranges reported by the assigning authority (intel). Independent of NVD's CPE analysis and usually ahead of it.
Extensible Firmware Interface Development Kit (EDK II) Extensible Firmware Interface Development Kit (EDK II)
- N/Aaffected
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | edk2 | before 0~20181115.85588389-3 | 0~20181115.85588389-3 |
| openSUSE:Leap 15.0 | ovmf | before 2017+git1510945757.b2662641d5-lp150.4.13.1 | 2017+git1510945757.b2662641d5-lp150.4.13.1 |
| openSUSE:Tumbleweed | ovmf | before 202105-3.4 | 202105-3.4 |
| Red Hat:enterprise_linux:7::hypervisor | redhat-release-virtualization-host | before 0:4.3-0.6.el7 | 0:4.3-0.6.el7 |
| Red Hat:enterprise_linux:7::hypervisor | redhat-virtualization-host | before 0:4.3-20190418.0.el7_6 | 0:4.3-20190418.0.el7_6 |
| Red Hat:enterprise_linux:7::hypervisor | redhat-virtualization-host-image-update | before 0:4.3-20190418.0.el7_6 | 0:4.3-20190418.0.el7_6 |
| Red Hat:enterprise_linux:7::hypervisor | redhat-virtualization-host-image-update-placeholder | before 0:4.3-0.6.el7 | 0:4.3-0.6.el7 |
| Red Hat:enterprise_linux:7::server | AAVMF | before 0:20180508-3.gitee3198e672e2.el7_6.1 | 0:20180508-3.gitee3198e672e2.el7_6.1 |
| Red Hat:enterprise_linux:7::server | OVMF | before 0:20180508-3.gitee3198e672e2.el7_6.1 | 0:20180508-3.gitee3198e672e2.el7_6.1 |
| Red Hat:enterprise_linux:8::appstream | edk2 | before 0:20180508gitee3198e672e2-9.el8_0.1 | 0:20180508gitee3198e672e2-9.el8_0.1 |
| Red Hat:enterprise_linux:8::appstream | edk2-aarch64 | before 0:20180508gitee3198e672e2-9.el8_0.1 | 0:20180508gitee3198e672e2-9.el8_0.1 |
| Red Hat:enterprise_linux:8::appstream | edk2-ovmf | before 0:20180508gitee3198e672e2-9.el8_0.1 | 0:20180508gitee3198e672e2-9.el8_0.1 |
| SUSE:Linux Enterprise Desktop 12 SP4 | ovmf | before 2017+git1510945757.b2662641d5-3.8.3 | 2017+git1510945757.b2662641d5-3.8.3 |
| SUSE:Linux Enterprise Module for Server Applications 15 | ovmf | before 2017+git1510945757.b2662641d5-5.14.1 | 2017+git1510945757.b2662641d5-5.14.1 |
| SUSE:Linux Enterprise Server 12 SP3 | ovmf | before 2017+git1492060560.b6d11d7c46-4.20.1 | 2017+git1492060560.b6d11d7c46-4.20.1 |
Same product
tianocore: all recordsOther highest-scoring records for the same primary product.
- CVE-2019-0160Buffer overflow in system firmware for EDK II may allow unauthenticated user to potentially enable escalation of privilege and/or denial of 39Monitor
- CVE-2018-12178Buffer overflow in network stack for EDK II may allow unprivileged user to potentially enable escalation of privilege and/or denial of servi37Monitor
- CVE-2021-28216BootPerformanceTable pointer is read from an NVRAM variable in PEI.31Monitor
- CVE-2018-3613Logic issue in variable service module for EDK II/UDK2018/UDK2017/UDK2015 may allow an authenticated user to potentially enable escalation o31Monitor
- CVE-2018-12179Improper configuration in system firmware for EDK II may allow unauthenticated user to potentially enable escalation of privilege, informati31Monitor
- CVE-2019-11098Insufficient input validation in MdeModulePkg in EDKII may allow an unauthenticated user to potentially enable escalation of privilege, deni27Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| debian:edk2 | 0~20181115.85588389-3 · Debian:12 | Package registry (OSV) |
| opensuse:ovmf | 2017+git1510945757.b2662641d5-lp150.4.13.1 · openSUSE:Leap 15.0 | Package registry (OSV) |
| red hat:AAVMF | 0:20180508-3.gitee3198e672e2.el7_6.1 · Red Hat:enterprise_linux:7::server | Package registry (OSV) |
| red hat:edk2 | 0:20180508gitee3198e672e2-9.el8_0.1 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:edk2-aarch64 | 0:20180508gitee3198e672e2-9.el8_0.1 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:edk2-ovmf | 0:20180508gitee3198e672e2-9.el8_0.1 · Red Hat:enterprise_linux:8::appstream | Package registry (OSV) |
| red hat:ovmf | 0:20180508-3.gitee3198e672e2.el7_6.1 · Red Hat:enterprise_linux:7::server | Package registry (OSV) |
| red hat:OVMF | 0:20180508-3.gitee3198e672e2.el7_6.1 · Red Hat:enterprise_linux:7::server | Package registry (OSV) |
| red hat:redhat-release-virtualization-host | 0:4.3-0.6.el7 · Red Hat:enterprise_linux:7::hypervisor | Package registry (OSV) |
| red hat:redhat-virtualization-host | 0:4.3-20190418.0.el7_6 · Red Hat:enterprise_linux:7::hypervisor | Package registry (OSV) |
| red hat:redhat-virtualization-host-image-update | 0:4.3-20190418.0.el7_6 · Red Hat:enterprise_linux:7::hypervisor | Package registry (OSV) |
| red hat:redhat-virtualization-host-image-update-placeholder | 0:4.3-0.6.el7 · Red Hat:enterprise_linux:7::hypervisor | Package registry (OSV) |
| suse:ovmf | 2017+git1492060560.b6d11d7c46-4.20.1 · SUSE:Linux Enterprise Server 12 SP3 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- A user must open a link or visit a page.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
CWE-787 · Out-of-bounds WriteCVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (7 more)Show less
- access.redhat.com/errata/RHSA-2019:0809
- access.redhat.com/errata/RHSA-2019:0968
- access.redhat.com/errata/RHSA-2019:1116
- edk2-docs.gitbooks.io/security-advisory/content/buffer-overflow-in-blockio-service-for-ram-disk.html
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4ABTDKZK2G5XP6JCO3HXMPOA2NRTIYDZ/
- support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03912en_us
- usn.ubuntu.com/4349-1/
Vendor advisories and official records. Exploit/PoC links are deliberately left out.