SARA / Free Tools / KEV / CVE-2023-4863

CVE-2023-4863 on CISA KEV

Heap buffer overflow in libwebp in Google Chrome prior to 116.0.5845.187 and libwebp 1.3.2 allowed a remote attacker to perform an out of bounds memory write via a crafted HTML page. (Chromium security severity: Critical)

CISA KEV — Actively Exploited

Google Chromium WebP Heap-Based Buffer Overflow Vulnerability

Vendor / Product
— / Google / Chromium WebP
Added to KEV
2023-09-13
BOD 22-01 due
2023-10-04
Ransomware use
Unknown
CVSS / EPSS
· EPSS 94.08%

01What CISA says about this vulnerability

Heap buffer overflow in libwebp in Google Chrome prior to 116.0.5845.187 and libwebp 1.3.2 allowed a remote attacker to perform an out of bounds memory write via a crafted HTML page. (Chromium security severity: Critical)

02Required action — verbatim from CISA

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

03Notes & references

04SARA's analyst layer — why this matters

This vulnerability is currently on the CISA KEV list, which CISA only adds CVEs to when there is reliable evidence of active exploitation in the wild. For federal civilian agencies, BOD 22-01 requires remediation by the due date above. For everyone else, KEV is the strongest "patch immediately" signal you can get from public threat intel.

05Affected products (summary)

VendorProductVersions
GoogleChrome116.0.5845.187
Googlelibwebp1.3.2

06Detection

Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection:

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