# CVE-2023-4863

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)

- Page: https://www.vulneraibility.com/cve/CVE-2023-4863
- CVSS: 8.8
- Known exploited: yes, in CISA KEV since 2023-09-13; CISA due date 2023-10-04
- EPSS: 99.98% (percentile 100.0)
- Unvetted proof-of-concept code on GitHub: 14 GitHub proofs of concept (first 2023-09-21)
- CISA SSVC: exploitation active, automatable no, technical impact total
- Weakness: CWE-787
- Also known as: GHSA-j7hp-h8jx-5ppr, PYSEC-2023-174, PYSEC-2023-175, PYSEC-2023-181, PYSEC-2023-182, PYSEC-2023-183, PYSEC-2023-184, PYSEC-2026-1794
- Published: 2023-09-12

## Affected versions

- Google Chrome: affected < 116.0.5845.187
- Google libwebp: affected < 1.3.2

A version outside these ranges is not a statement that it is unaffected.

## References

- [other] https://chromereleases.googleblog.com/2023/09/stable-channel-update-for-desktop_11.html
- [other] https://crbug.com/1479274
- [other] https://en.bandisoft.com/honeyview/history/
- [other] https://stackdiary.com/critical-vulnerability-in-webp-codec-cve-2023-4863/
- [other] https://www.mozilla.org/en-US/security/advisories/mfsa2023-40/
- [other] https://github.com/webmproject/libwebp/commit/902bc9190331343b2017211debcec8d2ab87e17a
- [other] https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-4863
- [other] https://security-tracker.debian.org/tracker/CVE-2023-4863
- [other] https://bugzilla.suse.com/show_bug.cgi?id=1215231
- [other] https://news.ycombinator.com/item?id=37478403
- [other] https://www.bleepingcomputer.com/news/google/google-fixes-another-chrome-zero-day-bug-exploited-in-attacks/
- [other] https://www.debian.org/security/2023/dsa-5496
- [other] https://www.debian.org/security/2023/dsa-5497
- [other] https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OZDGWWMJREPAGKWCJKSCM4WYLANSKIFX/
- [other] https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FYYKLG6CRGEDTNRBSU26EEWAO6D6U645/
- [other] https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PYZV7TMKF4QHZ54SFJX54BDN52VHGGCX/
- [other] https://lists.debian.org/debian-lts-announce/2023/09/msg00015.html
- [other] https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WHOLML7N2G5KCAZXFWC5IDFFHSQS5SDB/
- [other] https://www.debian.org/security/2023/dsa-5498
- [other] https://security.gentoo.org/glsa/202309-05
- [other] https://lists.debian.org/debian-lts-announce/2023/09/msg00016.html
- [other] https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6T655QF7CQ3DYAMPFV7IECQYGDEUIVVT/
- [other] https://adamcaudill.com/2023/09/14/whose-cve-is-it-anyway/
- [other] https://github.com/webmproject/libwebp/releases/tag/v1.3.2
- [other] https://lists.debian.org/debian-lts-announce/2023/09/msg00017.html
- [other] https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/KUQ7CTX3W372X3UY56VVNAHCH6H2F4X3/
- [other] http://www.openwall.com/lists/oss-security/2023/09/21/4
- [other] https://blog.isosceles.com/the-webp-0day/
- [other] http://www.openwall.com/lists/oss-security/2023/09/22/1
- [other] http://www.openwall.com/lists/oss-security/2023/09/22/3
- [other] http://www.openwall.com/lists/oss-security/2023/09/22/4
- [other] http://www.openwall.com/lists/oss-security/2023/09/22/5
- [other] http://www.openwall.com/lists/oss-security/2023/09/22/8
- [other] http://www.openwall.com/lists/oss-security/2023/09/22/7
- [other] http://www.openwall.com/lists/oss-security/2023/09/22/6
- [other] http://www.openwall.com/lists/oss-security/2023/09/26/1
- [other] http://www.openwall.com/lists/oss-security/2023/09/26/7
- [other] http://www.openwall.com/lists/oss-security/2023/09/28/1
- [other] http://www.openwall.com/lists/oss-security/2023/09/28/2
- [other] http://www.openwall.com/lists/oss-security/2023/09/28/4
- [other] https://security.netapp.com/advisory/ntap-20230929-0011/
- [other] https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WTRUIS3564P7ZLM2S2IH4Y4KZ327LI4I/
- [other] https://sethmlarson.dev/security-developer-in-residence-weekly-report-16
- [other] https://www.bentley.com/advisories/be-2023-0001/
- [other] https://security.gentoo.org/glsa/202401-10
- [other] https://www.vicarius.io/vsociety/posts/zero-day-webp-vulnerability-cve-2023-4863
- [other] https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-4863

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.