A stack buffer overflow in the fribidi_get_par_embedding_levels_ex() function in lib/fribidi-bidi.c of GNU FriBidi 1.0.0 through 1.0.7 allows an attacker to cause a denial of service or possibly execute arbitrary code by delivering crafted text content to a user, when this content is then rendered by an application that uses FriBidi for text layout calculations. Examples include any GNOME or GTK+ based application that uses Pango for text rendering, as this internally uses FriBidi for bidirectional text layout. For example, the attacker can construct a crafted text file to be opened in GEdit, a crafted IRC message to be viewed in HexChat or a crafted email to be viewed in Evolution.
Upstream fix (already public): https://github.com/fribidi/fribidi/commit/034c6e9a1d296286305f4cfd1e0072b879f52568
The bug has been referenced in the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=77e557a14b9c35e0ea9b8a29f50d22a96b9e7fc1 commit 77e557a14b9c35e0ea9b8a29f50d22a96b9e7fc1 Author: Mart Raudsepp <leio@gentoo.org> AuthorDate: 2019-12-25 20:46:50 +0000 Commit: Mart Raudsepp <leio@gentoo.org> CommitDate: 2019-12-25 20:50:28 +0000 dev-libs/fribidi: security bump to 1.0.8 Bug: https://bugs.gentoo.org/699338 Package-Manager: Portage-2.3.79, Repoman-2.3.12 Signed-off-by: Mart Raudsepp <leio@gentoo.org> dev-libs/fribidi/Manifest | 1 + dev-libs/fribidi/fribidi-1.0.8.ebuild | 37 +++++++++++++++++++++++++++++++++++ 2 files changed, 38 insertions(+)
amd64 stable
arm64 stable
ia64 stable
hppa/sparc stable
x86 stable
ppc64 stable
ppc stable
arm stable
s390 stable
New GLSA request filed.
This issue was resolved and addressed in GLSA 202003-41 at https://security.gentoo.org/glsa/202003-41 by GLSA coordinator Thomas Deutschmann (whissi).
