Linux Kernel 5.3.11 btrfs Image Mount kernel/locking/rwsem.c rwsem_down_write_slowpath use after free

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.4$5k-$25k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in Linux Kernel 5.3.11. Affected by this vulnerability is the function rwsem_down_write_slowpath of the file kernel/locking/rwsem.c of the component btrfs Image Mount Handler. Executing a manipulation can lead to use after free. This vulnerability is handled as CVE-2019-19318. It is possible to launch the attack on the local host. There is not any exploit available.

Detailsinfo

A vulnerability classified as critical was found in Linux Kernel 5.3.11 (Operating System). This vulnerability affects the function rwsem_down_write_slowpath of the file kernel/locking/rwsem.c of the component btrfs Image Mount Handler. The manipulation with an unknown input leads to a use after free vulnerability. The CWE definition for the vulnerability is CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

In the Linux kernel 5.3.11, mounting a crafted btrfs image twice can cause an rwsem_down_write_slowpath use-after-free because (in rwsem_can_spin_on_owner in kernel/locking/rwsem.c) rwsem_owner_flags returns an already freed pointer,

The weakness was released 11/28/2019. This vulnerability was named CVE-2019-19318 since 11/26/2019. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. 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 02/28/2024).

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

Entries connected to this vulnerability are available at VDB-146477 and VDB-146473. 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: 5.4
VulDB Meta Temp Score: 5.4

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

NVD Base Score: 5.5
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: Use after free
CWE: CWE-416 / 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

11/26/2019 🔍
11/28/2019 +2 days 🔍
11/28/2019 +0 days 🔍
02/28/2024 +1553 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: USN-4414-1
Status: Not defined

CVE: CVE-2019-19318 (🔍)
GCVE (CVE): GCVE-0-2019-19318
GCVE (VulDB): GCVE-100-146476
See also: 🔍

Entryinfo

Created: 11/28/2019 08:22
Updated: 02/28/2024 20:30
Changes: 11/28/2019 08:22 (39), 12/02/2019 12:29 (18), 02/28/2024 20:30 (4)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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