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Vulnerability record · CVE-2018-12900 · published 26 June 2018

CVE-2018-12900: Libtiff out-of-bounds write vulnerability

Libtiff · Libtiff

Heap-based buffer overflow in the cpSeparateBufToContigBuf function in tiffcp.c in LibTIFF 3.9.3, 3.9.4, 3.9.5, 3.9.6, 3.9.7, 4.0.0beta7, 4.0.0alpha4, 4.0.0alpha5, 4.0.0alpha6, 4.0.0, 4.0.1, 4.0.2, 4.0.3, 4.0.4, 4.0.4beta, 4.0.5, 4.0.6, 4.0.7, 4.0.8 and 4.0.9 allows remote attackers to cause a denial of service (crash) or possibly have unspecified other impact via a crafted TIFF file.

8.8 CVSS 3.0 High EPSS 25% · top 2.1% CWE-787 · Out-of-bounds write
8.8CVSS 3.0 base score, v2 6.8
25%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
16References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

Heap-based buffer overflow in the cpSeparateBufToContigBuf function in tiffcp.c in LibTIFF 3.9.3, 3.9.4, 3.9.5, 3.9.6, 3.9.7, 4.0.0beta7, 4.0.0alpha4, 4.0.0alpha5, 4.0.0alpha6, 4.0.0, 4.0.1, 4.0.2, 4.0.3, 4.0.4, 4.0.4beta, 4.0.5, 4.0.6, 4.0.7, 4.0.8 and 4.0.9 allows remote attackers to cause a denial of service (crash) or possibly have unspecified other impact via a crafted TIFF file.

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://bugzilla.maptools.org/show_bug.cgi?id=2798 ExploitIssue TrackingThird Party Advisory
https://access.redhat.com/errata/RHSA-2019:2053
https://access.redhat.com/errata/RHSA-2019:3419
https://github.com/Hack-Me/Pocs_for_Multi_Versions/tree/main/CVE-2018-12900
https://lists.debian.org/debian-lts-announce/2019/11/msg00027.html
https://usn.ubuntu.com/3906-1/ Third Party Advisory
https://usn.ubuntu.com/3906-2/
https://www.debian.org/security/2020/dsa-4670
http://bugzilla.maptools.org/show_bug.cgi?id=2798 ExploitIssue TrackingThird Party Advisory
https://access.redhat.com/errata/RHSA-2019:2053
https://access.redhat.com/errata/RHSA-2019:3419
https://github.com/Hack-Me/Pocs_for_Multi_Versions/tree/main/CVE-2018-12900
https://lists.debian.org/debian-lts-announce/2019/11/msg00027.html
https://usn.ubuntu.com/3906-1/ Third Party Advisory
https://usn.ubuntu.com/3906-2/
https://www.debian.org/security/2020/dsa-4670

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Source: NIST National Vulnerability Database (record CVE-2018-12900), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.