×ばつ48) decodes decodes (no regression) Important: this is a stopgap The vendored libtiff here is 3.9.4 (2010). It still carries many other pre-4.0 libtiff CVEs beyond this one; a single backport does not make it safe. Strongly recommend upgrading the vendored CxImage libtiff to a current 4.x release (and ideally consolidating with the 4.x copy already present under DesktopEditor/raster/Jp2/openjpeg/.../thirdparty/libtiff). This PR is a minimal, low-risk mitigation for the one reachable heap-write in the meantime. Refs: CVE-2011-0192; upstream libtiff 3.9.5 tif_fax3.h fix.">

Skip to content

Fix CCITT Fax3/Fax4 decoder heap overflow in vendored libtiff (CVE-2011-0192) #1643

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open

dkgkdfg65 wants to merge 1 commit into ONLYOFFICE:master

from dkgkdfg65:fix-libtiff-fax4-cve-2011-0192

+6 −0

Open

Fix CCITT Fax3/Fax4 decoder heap overflow in vendored libtiff (CVE-2011-0192) #1643

Changes from all commits

Commits

Show all changes

Select commit

Fix CCITT Fax3/Fax4 decoder heap-buffer-overflow (CVE-2011-0192)

dkgkdfg65 Jun 10, 2026

File filter

Filter by extension

Conversations

Jump to

Jump to file

Failed to load files.

Loading

Diff view

Diff view

6 changes: 6 additions & 0 deletions DesktopEditor/cximage/tiff/tif_fax3.h

Show comments View file Open in desktop

Original file line number	Diff line number	Diff line change
Expand Up		@@ -478,6 +478,12 @@ done1d: \
		break; \
		case S_VL: \
		CHECK_b1; \
	if (b1 <= (int) (a0 + TabEnt->Param)) { \
	if (b1 < (int) (a0 + TabEnt->Param) \|\| pa != thisrun) { \
	unexpected("VL", a0); \
	goto eol2d; \
	} \
	} \
		SETVALUE(b1 - a0 - TabEnt->Param); \
		b1 -= *--pb; \
		break; \
Expand Down