CVE-2023-4863
Google Chromium WebP Heap-Based Buffer Overflow Vulnerability
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 4 October 2023). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
Description
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)
- CVSS 3.1
- 8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 99.98% probability · 100th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Listed 13 September 2023 · due 4 October 2023
- Weakness
- CWE-787
- Affected
- google/chrome · fedoraproject/fedora · debian/debian linux · mozilla/firefox · mozilla/thunderbird · microsoft/edge chromium · microsoft/teams · microsoft/webp image extension · webmproject/libwebp · netapp/active iq unified manager · bentley/seequent leapfrog · bandisoft/honeyview
- Source
- chrome-cve-admin@google.com
EPSS 100.0% since 26 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
CISA notes
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. https://chromereleases.googleblog.com/2023/09/stable-channel-update-for-desktop_11.html?m=1; https://nvd.nist.gov/vuln/detail/CVE-2023-4863
References
- http://www.openwall.com/lists/oss-security/2023/09/21/4Mailing List
- http://www.openwall.com/lists/oss-security/2023/09/22/1Mailing List
- http://www.openwall.com/lists/oss-security/2023/09/22/3Mailing List
- http://www.openwall.com/lists/oss-security/2023/09/22/4Mailing List
- http://www.openwall.com/lists/oss-security/2023/09/22/5Mailing List
- http://www.openwall.com/lists/oss-security/2023/09/22/6Mailing List
- http://www.openwall.com/lists/oss-security/2023/09/22/7Mailing List
- http://www.openwall.com/lists/oss-security/2023/09/22/8Mailing List
- http://www.openwall.com/lists/oss-security/2023/09/26/1Mailing List
- http://www.openwall.com/lists/oss-security/2023/09/26/7Mailing List
- http://www.openwall.com/lists/oss-security/2023/09/28/1Mailing List
- http://www.openwall.com/lists/oss-security/2023/09/28/2Mailing List
- http://www.openwall.com/lists/oss-security/2023/09/28/4Mailing List
- https://adamcaudill.com/2023/09/14/whose-cve-is-it-anyway/Third Party Advisory
- https://blog.isosceles.com/the-webp-0day/Exploit, Third Party Advisory
- https://bugzilla.suse.com/show_bug.cgi?id=1215231Issue Tracking, Third Party Advisory
- https://chromereleases.googleblog.com/2023/09/stable-channel-update-for-desktop_11.htmlVendor Advisory
- https://crbug.com/1479274Issue Tracking, Vendor Advisory
- https://en.bandisoft.com/honeyview/history/Release Notes
- https://github.com/webmproject/libwebp/commit/902bc9190331343b2017211debcec8d2ab87e17aPatch
- https://github.com/webmproject/libwebp/releases/tag/v1.3.2Release Notes
- https://lists.debian.org/debian-lts-announce/2023/09/msg00015.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/09/msg00016.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/09/msg00017.htmlMailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6T655QF7CQ3DYAMPFV7IECQYGDEUIVVT/Mailing List
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FYYKLG6CRGEDTNRBSU26EEWAO6D6U645/Mailing List
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/KUQ7CTX3W372X3UY56VVNAHCH6H2F4X3/Mailing List
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OZDGWWMJREPAGKWCJKSCM4WYLANSKIFX/Mailing List
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PYZV7TMKF4QHZ54SFJX54BDN52VHGGCX/Mailing List
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WHOLML7N2G5KCAZXFWC5IDFFHSQS5SDB/Mailing List
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.