CVE-2018-18557 EXPLOIT
8.8
HIGH · CVSS 3.0 · EPSS 15% (pctl 97)
Patch early
A public exploit exists.
Description
LibTIFF 3.9.3, 3.9.4, 3.9.5, 3.9.6, 3.9.7, 4.0.0alpha4, 4.0.0alpha5, 4.0.0alpha6, 4.0.0beta7, 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 (with JBIG enabled) decodes arbitrarily-sized JBIG into a buffer, ignoring the buffer size, which leads to a tif_jbig.c JBIGDecode out-of-bounds write.
Scoring
| CVSS | 8.8 (HIGH, v3.0) |
|---|---|
| Vector | CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| EPSS | 14.96% — more likely to be exploited than 97% of all CVEs |
| Weakness | CWE-787 |
| On CISA KEV | no |
| Public exploit | yes |
| Published | 2018-10-22 |
| Last modified | 2026-06-17 |
Affected (3)
| Vendor | Product |
|---|---|
| canonical | ubuntu linux |
| debian | debian linux |
| libtiff | libtiff |
Public exploits
| Source | Title | Date |
|---|---|---|
| exploit-db | libtiff 4.0.9 - Decodes Arbitrarily Sized JBIG into a Target Buffer | 2018-10-25 |
References
- https://access.redhat.com/errata/RHSA-2019:2053
- https://github.com/Hack-Me/Pocs_for_Multi_Versions/tree/main/CVE-2018-18557
- https://gitlab.com/libtiff/libtiff/commit/681748ec2f5ce88da5f9fa6831e1653e46af8a66
- https://gitlab.com/libtiff/libtiff/merge_requests/38
- https://lists.debian.org/debian-lts-announce/2018/10/msg00019.html
- https://security.gentoo.org/glsa/201904-15
- https://usn.ubuntu.com/3864-1/
- https://usn.ubuntu.com/3906-2/
- https://www.debian.org/security/2018/dsa-4349
- https://www.exploit-db.com/exploits/45694/
- https://access.redhat.com/errata/RHSA-2019:2053
- https://github.com/Hack-Me/Pocs_for_Multi_Versions/tree/main/CVE-2018-18557
- https://gitlab.com/libtiff/libtiff/commit/681748ec2f5ce88da5f9fa6831e1653e46af8a66
- https://gitlab.com/libtiff/libtiff/merge_requests/38
- https://lists.debian.org/debian-lts-announce/2018/10/msg00019.html
- https://security.gentoo.org/glsa/201904-15
- https://usn.ubuntu.com/3864-1/
- https://usn.ubuntu.com/3906-2/
- https://www.debian.org/security/2018/dsa-4349
- https://www.exploit-db.com/exploits/45694/
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