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7.8
HIGH CVSS 3.1
CVE-2024-49996
cifs: Fix buffer overflow when parsing NFS reparse points
Description

In the Linux kernel, the following vulnerability has been resolved: cifs: Fix buffer overflow when parsing NFS reparse points ReparseDataLength is sum of the InodeType size and DataBuffer size. So to get DataBuffer size it is needed to subtract InodeType's size from ReparseDataLength. Function cifs_strndup_from_utf16() is currentlly accessing buf->DataBuffer at position after the end of the buffer because it does not subtract InodeType size from the length. Fix this problem and correctly subtract variable len. Member InodeType is present only when reparse buffer is large enough. Check for ReparseDataLength before accessing InodeType to prevent another invalid memory access. Major and minor rdev values are present also only when reparse buffer is large enough. Check for reparse buffer size before calling reparse_mkdev().

INFO

Published Date :

Oct. 21, 2024, 6:15 p.m.

Last Modified :

Dec. 14, 2024, 9:15 p.m.

Remotely Exploit :

No

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Products

The following products are affected by CVE-2024-49996 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Linux linux_kernel
: Total Affected Vendor : 1 | Products : 1
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 HIGH [email protected]
Solution
This vulnerability in the Linux kernel requires updating the kernel packages.
  • Update the Linux kernel packages to a patched version.
  • Reboot the system after the update, if required.
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2024-49996.

URL Resource
https://git.kernel.org/stable/c/01cdddde39b065074fd48f07027757783cbf5b7d
https://git.kernel.org/stable/c/73b078e3314d4854fd8286f3ba65c860ddd3a3dd
https://git.kernel.org/stable/c/7b222d6cb87077faf56a687a72af1951cf78c8a9
https://git.kernel.org/stable/c/803b3a39cb096d8718c0aebc03fd19f11c7dc919 Patch
https://git.kernel.org/stable/c/c173d47b69f07cd7ca08efb4e458adbd4725d8e9 Patch
https://git.kernel.org/stable/c/c6db81c550cea0c73bd72ef55f579991e0e4ba07 Patch
https://git.kernel.org/stable/c/e2a8910af01653c1c268984855629d71fb81f404 Patch
https://git.kernel.org/stable/c/ec79e6170bcae8a6036a4b6960f5e7e59a785601
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2024-49996 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2024-49996 weaknesses.

CAPEC-8: Buffer Overflow in an API Call Buffer Overflow in an API Call CAPEC-9: Buffer Overflow in Local Command-Line Utilities Buffer Overflow in Local Command-Line Utilities CAPEC-10: Buffer Overflow via Environment Variables Buffer Overflow via Environment Variables CAPEC-14: Client-side Injection-induced Buffer Overflow Client-side Injection-induced Buffer Overflow CAPEC-24: Filter Failure through Buffer Overflow Filter Failure through Buffer Overflow CAPEC-42: MIME Conversion MIME Conversion CAPEC-44: Overflow Binary Resource File Overflow Binary Resource File CAPEC-45: Buffer Overflow via Symbolic Links Buffer Overflow via Symbolic Links CAPEC-46: Overflow Variables and Tags Overflow Variables and Tags CAPEC-47: Buffer Overflow via Parameter Expansion Buffer Overflow via Parameter Expansion CAPEC-67: String Format Overflow in syslog() String Format Overflow in syslog() CAPEC-92: Forced Integer Overflow Forced Integer Overflow CAPEC-100: Overflow Buffers Overflow Buffers

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2024-49996 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2024-49996 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Dec. 14, 2024

    Action Type Old Value New Value
    Added Reference https://git.kernel.org/stable/c/01cdddde39b065074fd48f07027757783cbf5b7d
    Added Reference https://git.kernel.org/stable/c/73b078e3314d4854fd8286f3ba65c860ddd3a3dd
    Added Reference https://git.kernel.org/stable/c/7b222d6cb87077faf56a687a72af1951cf78c8a9
    Added Reference https://git.kernel.org/stable/c/ec79e6170bcae8a6036a4b6960f5e7e59a785601
  • Initial Analysis by [email protected]

    Oct. 25, 2024

    Action Type Old Value New Value
    Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
    Changed Reference Type https://git.kernel.org/stable/c/803b3a39cb096d8718c0aebc03fd19f11c7dc919 No Types Assigned https://git.kernel.org/stable/c/803b3a39cb096d8718c0aebc03fd19f11c7dc919 Patch
    Changed Reference Type https://git.kernel.org/stable/c/c173d47b69f07cd7ca08efb4e458adbd4725d8e9 No Types Assigned https://git.kernel.org/stable/c/c173d47b69f07cd7ca08efb4e458adbd4725d8e9 Patch
    Changed Reference Type https://git.kernel.org/stable/c/c6db81c550cea0c73bd72ef55f579991e0e4ba07 No Types Assigned https://git.kernel.org/stable/c/c6db81c550cea0c73bd72ef55f579991e0e4ba07 Patch
    Changed Reference Type https://git.kernel.org/stable/c/e2a8910af01653c1c268984855629d71fb81f404 No Types Assigned https://git.kernel.org/stable/c/e2a8910af01653c1c268984855629d71fb81f404 Patch
    Added CWE NIST CWE-120
    Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.3 up to (excluding) 6.6.55 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.10.14 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.11 up to (excluding) 6.11.3
  • CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Oct. 21, 2024

    Action Type Old Value New Value
    Added Description In the Linux kernel, the following vulnerability has been resolved: cifs: Fix buffer overflow when parsing NFS reparse points ReparseDataLength is sum of the InodeType size and DataBuffer size. So to get DataBuffer size it is needed to subtract InodeType's size from ReparseDataLength. Function cifs_strndup_from_utf16() is currentlly accessing buf->DataBuffer at position after the end of the buffer because it does not subtract InodeType size from the length. Fix this problem and correctly subtract variable len. Member InodeType is present only when reparse buffer is large enough. Check for ReparseDataLength before accessing InodeType to prevent another invalid memory access. Major and minor rdev values are present also only when reparse buffer is large enough. Check for reparse buffer size before calling reparse_mkdev().
    Added Reference kernel.org https://git.kernel.org/stable/c/c6db81c550cea0c73bd72ef55f579991e0e4ba07 [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/803b3a39cb096d8718c0aebc03fd19f11c7dc919 [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/c173d47b69f07cd7ca08efb4e458adbd4725d8e9 [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/e2a8910af01653c1c268984855629d71fb81f404 [No types assigned]
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 7.8
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact