Google WebP libwebp heap-based overflow

CVSS Meta Temp Score
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CTI Interest Score
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7.9$0-$5k0.00

Summaryinfo

A vulnerability was found in Google WebP. It has been classified as critical. Impacted is an unknown function of the component libwebp. Performing a manipulation results in heap-based overflow. This vulnerability is known as CVE-2023-4863. Remote exploitation of the attack is possible. Furthermore, an exploit is available. Upgrading the affected component is recommended. A duplicate CVE-2023-5129 appears to be assigned to this entry.

Detailsinfo

A vulnerability, which was classified as critical, was found in Google WebP. This affects an unknown code block of the component libwebp. The manipulation with an unknown input leads to a heap-based overflow vulnerability. CWE is classifying the issue as CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). This is going to have an impact on confidentiality, integrity, and availability.

The weakness was published 09/12/2023 with Apple Security Engineering and Architecture/Citizen Lab as Stable Channel Update for Desktop, September 2023 as confirmed release notes (Website). It is possible to read the advisory at chromereleases.googleblog.com. The Google Chrome team assigned CVE-2023-4863 on 2023-09-12 for Google Chrome only. Further analysis indicated that this was not a Chrome issue but affecting libwebp (which is used by multiple browsers). Google then assigned CVE-2023-5129 to WebP on 2023-09-25. It looked like they wanted to create two distinguished CVEs. But later on 2023-09-27 they revoked CVE-2023-5129 again and incorporated the assignment of WebP into CVE-2023-4863 instead. Therefore, in the end CVE-2023-4863 and CVE-2023-5129 were the same entries but CVE-2023-5129 shall not be used anymore. This vulnerability is uniquely identified as CVE-2023-4863 since 09/09/2023. It demands that the victim is doing some kind of user interaction. Technical details are unknown but an exploit is available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 02/04/2025). It is expected to see the exploit prices for this product increasing in the near future.

It is declared as attacked. The vulnerability scanner Nessus provides a plugin with the ID 214092 (Fortinet FortiClient CVE-2023-4863 - Heap overflow in Chrome/libwebp (FG-IR-23-381)), which helps to determine the existence of the flaw in a target environment. The advisory illustrates:

Google is aware that an exploit for CVE-2023-4863 exists in the wild.
The CISA Known Exploited Vulnerabilities Catalog lists this issue since 09/13/2023 with a due date of 10/04/2023:
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the databases at Zero-Day.cz (808) and Tenable (214092). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Affected

  • Google libwebp
  • Google Chrome

Productinfo

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.0
VulDB Meta Temp Score: 7.9

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.8
NVD Vector: 🔍

CNA Base Score: 8.8
CNA Vector: 🔍

CVSSv2info

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

Exploitinginfo

Class: Heap-based overflow
CWE: CWE-122 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Attacked

EPSS Score: 🔍
EPSS Percentile: 🔍

KEV Added: 🔍
KEV Due: 🔍
KEV Remediation: 🔍
KEV Ransomware: 🔍
KEV Notice: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 214092
Nessus Name: Fortinet FortiClient CVE-2023-4863 - Heap overflow in Chrome/libwebp (FG-IR-23-381)

Zero-Day.cz: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: github.com
Patch: github.com

Timelineinfo

09/09/2023 🔍
09/12/2023 +3 days 🔍
09/12/2023 +0 days 🔍
04/22/2025 +587 days 🔍

Sourcesinfo

Vendor: google.com

Advisory: Stable Channel Update for Desktop, September 2023
Organization: Apple Security Engineering and Architecture/Citizen Lab
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2023-4863 (🔍)
CVE Duplicate: 🔍
GCVE (CVE): GCVE-0-2023-4863
GCVE (VulDB): GCVE-100-239475
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 09/12/2023 08:24
Updated: 04/22/2025 01:39
Replaces Duplicates: 🔍
Changes: 09/12/2023 08:24 (41), 10/03/2023 09:00 (3), 10/03/2023 09:04 (15), 10/10/2023 10:41 (3), 10/10/2023 10:47 (11), 04/29/2024 12:25 (23), 06/07/2024 12:17 (2), 06/28/2024 06:24 (1), 09/09/2024 22:30 (2), 01/15/2025 05:57 (2), 02/04/2025 00:55 (11), 04/22/2025 01:39 (3)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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