CVE-2019-18397 Information

Description

A buffer overflow in the fribidi_get_par_embedding_levels_ex() function in lib/fribidi-bidi.c of GNU FriBidi 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 layout as this internally uses FriBidi for bidirectional text layout. For example the attacker can construct a crafted text file to be opened in GEdit or a crafted IRC message to be viewed in HexChat.

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Reference

https://access.redhat.com/errata/RHSA-2019:4326 https://access.redhat.com/errata/RHSA-2019:4361 https://access.redhat.com/errata/RHSA-2020:0291 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=944327 https://github.com/fribidi/fribidi/commit/034c6e9a1d296286305f4cfd1e0072b879f52568 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TFS3N6KKXPI6ATDNEUFRSLX7R6BOBNIP/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/W5UJRTG32FDNI7T637Q6PZYL3UCRR5HR/ https://marc.info/?l=oss-security&m=157322128105807&w=2 https://security.gentoo.org/glsa/202003-41 https://security-tracker.debian.org/tracker/CVE-2019-18397

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

7.8