CVE-2018-18557

high-risk

Published 2018-10-22

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.

Do I need to act?

24.5% chance of exploitation in next 30 days

EPSS score — higher than 76% of all CVEs

Not on CISA KEV list

No confirmed active exploitation reported to CISA

1 public exploit available

45694

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 8.8/10 High

NETWORK / LOW complexity

Affected Products (7)

Libtiff

Debian Linux

Ubuntu Linux

Affected Vendors

Debian Libtiff Canonical

References (20)

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/681748ec2f5ce88da5f9fa6831e1653e46af8a...

Third Party Advisory https://gitlab.com/libtiff/libtiff/merge_requests/38

Mailing List https://lists.debian.org/debian-lts-announce/2018/10/msg00019.html

https://security.gentoo.org/glsa/201904-15

Third Party Advisory https://usn.ubuntu.com/3864-1/

https://usn.ubuntu.com/3906-2/

Third Party Advisory https://www.debian.org/security/2018/dsa-4349

Exploit https://www.exploit-db.com/exploits/45694/