Linux Kernel 5.0.21 btrfs Filesystem fs/btrfs/volumes.c __btrfs_map_block out-of-bounds write

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.5$5k-$25k0.00

Summaryinfo

A vulnerability, which was classified as critical, was found in Linux Kernel 5.0.21. Affected by this issue is the function __btrfs_map_block of the file fs/btrfs/volumes.c of the component btrfs Filesystem Handler. The manipulation results in out-of-bounds write. This vulnerability is cataloged as CVE-2019-19816. The attack must be initiated from a local position. There is no exploit available.

Detailsinfo

A vulnerability, which was classified as critical, was found in Linux Kernel 5.0.21 (Operating System). Affected is the function __btrfs_map_block of the file fs/btrfs/volumes.c of the component btrfs Filesystem Handler. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. CWE is classifying the issue as CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

In the Linux kernel 5.0.21, mounting a crafted btrfs filesystem image and performing some operations can cause slab-out-of-bounds write access in __btrfs_map_block in fs/btrfs/volumes.c, because a value of 1 for the number of data stripes is mishandled.

The weakness was shared 12/17/2019. This vulnerability is traded as CVE-2019-19816 since 12/16/2019. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 03/12/2024).

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

The entries VDB-147323, VDB-147322 and VDB-147321 are related to this item. Once again VulDB remains the best source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.5

VulDB Base Score: 5.3
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

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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: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

12/16/2019 🔍
12/17/2019 +1 days 🔍
12/18/2019 +1 days 🔍
03/12/2024 +1546 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: USN-4414-1
Status: Not defined

CVE: CVE-2019-19816 (🔍)
GCVE (CVE): GCVE-0-2019-19816
GCVE (VulDB): GCVE-100-147324
See also: 🔍

Entryinfo

Created: 12/18/2019 08:16
Updated: 03/12/2024 16:22
Changes: 12/18/2019 08:16 (39), 12/18/2019 08:21 (18), 03/12/2024 16:22 (4)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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