CVE-2023-4863
Google — Google Chromium WebP Heap-Based Buffer Overflow Vulnerability
Google · CWE-787 — Out-of-bounds write · in CISA KEV since 2023-09-13
EVRS 86 of 100 Immediate
Patch Immediately
Rank 305 of 2,960 tracked
Why it scores 86
Evidence available: 6 of 7 signalsListed in the CISA KEV catalog, and an EPSS probability of 0.999.
- CISA KEVApplied
- RansomwareDid not apply
- Vendor exploitationDid not apply
- EPSSApplied
- Microsoft Exploitability IndexNot applicable
- Pre-patch disclosureNo data
- KEV recencyDid not apply
- CVSSApplied
The band answers “how soon”, not “how bad”. No data for: Pre-patch disclosure. Why some signals show no data
Fix
Patch or fixed version identifiedCISA required action
- chromereleases.googleblog.com/…/stable-channel-update-for-desktop_11.html?m=1
- nvd.nist.gov/…/CVE-2023-4863
Fixed in
- libwebp-sys2
0.1.8 - libwebp-sys
0.9.3 - electron
22.3.2424.8.325.8.126.2.127.0.0-beta.2update to this version or later in your release line - SkiaSharp
2.88.6
Affected versions
- libwebp-sys2 (rust)
affected < 0.1.8, fixed in 0.1.8 - libwebp-sys (rust)
affected < 0.9.3, fixed in 0.9.3 - electron (npm)
affected >= 22.0.0, < 22.3.24, fixed in 22.3.24affected >= 24.0.0, < 24.8.3, fixed in 24.8.3affected >= 25.0.0, < 25.8.1, fixed in 25.8.1affected >= 26.0.0, < 26.2.1, fixed in 26.2.1affected >= 27.0.0-beta.1, < 27.0.0-beta.2, fixed in 27.0.0-beta.2 - SkiaSharp (nuget)
affected >= 2.0.0, < 2.88.6, fixed in 2.88.6
+4 more affected products; see the full list at NVD.
Remediation
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Fixed versions from NVD and GitHub. Affected packages also in GitHub Advisory GHSA-j7hp-h8jx-5ppr (CC BY 4.0). It lists 11 more packages; see GHSA-j7hp-h8jx-5ppr on GitHub for the full list.
Evidence
Each value with its source| Measure | Value | Source |
|---|---|---|
| CVSS base scoreHow severe the flaw is in itself. It does not say how likely an attack is. | 8.8 | NVD |
| FIRST EPSSFIRST's estimate of the chance this is exploited in the next 30 days, and how that ranks against all CVEs. | 0.999 (99.98th pctl) | FIRST EPSS |
| Actively exploitedWhether a source of record has confirmed attacks using it in the wild. | Confirmed | CISA KEV |
| Ransomware campaign useWhether CISA has seen ransomware operators use it. | Unknown or none | CISA KEV |
| CISA remediation deadlineThe date US federal agencies must have fixed or mitigated it. | 2023-10-04 · KEV since 2023 · listed over a year | CISA KEV |
| Public exploit moduleA module existing is not the same as active exploitation. | None known | Metasploit |
| EUVD cross-referenceENISA's record: CVSS 8.8 (v3.1), assigned by Chrome. | Listed | ENISA EUVD |
Description
NVDHeap 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)
What CISA says to do