QEMU 5.0.0 exec.c flatview_read_continue out-of-bounds write

CVSS Meta Temp Score
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CTI Interest Score
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5.4$0-$5k0.00

Summaryinfo

A vulnerability identified as critical has been detected in QEMU 5.0.0. This affects the function flatview_read_continue of the file exec.c. The manipulation leads to out-of-bounds write. This vulnerability is listed as CVE-2020-25085. The attack must be carried out locally. There is no available exploit.

Detailsinfo

A vulnerability was found in QEMU 5.0.0 (Virtualization Software) and classified as critical. This issue affects the function flatview_read_continue of the file exec.c. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. Using CWE to declare the problem leads to CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

QEMU 5.0.0 has a heap-based Buffer Overflow in flatview_read_continue in exec.c because hw/sd/sdhci.c mishandles a write operation in the SDHC_BLKSIZE case.

The weakness was presented 09/25/2020 (oss-sec). The advisory is shared at openwall.com. The identification of this vulnerability is CVE-2020-25085 since 09/02/2020. An attack has to be approached locally. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/17/2025).

The vulnerability scanner Nessus provides a plugin with the ID 250201 (Linux Distros Unpatched Vulnerability : CVE-2020-25085), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Tenable (250201). See VDB-161936 and VDB-161932 for similar entries. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.4

VulDB Base Score: 5.7
VulDB Temp Score: 5.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.0
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Out-of-bounds write
CWE: CWE-787 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 250201
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2020-25085

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

09/02/2020 🔍
09/25/2020 +23 days 🔍
09/25/2020 +0 days 🔍
08/17/2025 +1787 days 🔍

Sourcesinfo

Product: qemu.org

Advisory: openwall.com
Status: Not defined
Confirmation: 🔍

CVE: CVE-2020-25085 (🔍)
GCVE (CVE): GCVE-0-2020-25085
GCVE (VulDB): GCVE-100-161933
See also: 🔍

Entryinfo

Created: 09/25/2020 15:28
Updated: 08/17/2025 02:41
Changes: 09/25/2020 15:28 (38), 09/25/2020 15:33 (18), 11/13/2020 07:52 (1), 11/14/2020 06:53 (1), 08/17/2025 02:41 (17)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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