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CVE-2019-18397

Status Candidate

Overview

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.

Related Files

Red Hat Security Advisory 2019-4361-01
Posted Dec 23, 2019
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2019-4361-01 - A library to handle bidirectional scripts, so that the display is done in the proper way, while the text data itself is always written in logical order. Issues addressed include buffer overflow, code execution, and denial of service vulnerabilities.

tags | advisory, denial of service, overflow, vulnerability, code execution
systems | linux, redhat
advisories | CVE-2019-18397
MD5 | 69c78fe9a9b4d275979cf448d68c603e
Red Hat Security Advisory 2019-4326-01
Posted Dec 19, 2019
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2019-4326-01 - A library to handle bidirectional scripts, so that the display is done in the proper way, while the text data itself is always written in logical order. Issues addressed include buffer overflow, code execution, and denial of service vulnerabilities.

tags | advisory, denial of service, overflow, vulnerability, code execution
systems | linux, redhat
advisories | CVE-2019-18397
MD5 | 279e0aef5097c4967b1e02c46be33266
Debian Security Advisory 4561-1
Posted Nov 8, 2019
Authored by Debian | Site debian.org

Debian Linux Security Advisory 4561-1 - Alex Murray discovered a stack-based buffer overflow vulnerability in fribidi, an implementation of the Unicode Bidirectional Algorithm algorithm, which could result in denial of service or potentially the execution of arbitrary code, when processing a large number of unicode isolate directional characters.

tags | advisory, denial of service, overflow, arbitrary
systems | linux, debian
advisories | CVE-2019-18397
MD5 | ce1d8a43a11a6aafc4ddd0b0df7d4d8f
Ubuntu Security Notice USN-4179-1
Posted Nov 8, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4179-1 - Alex Murray discovered a stack-based buffer overflow when handling a large number of unicode isolate directives. An attacker could use this to cause a denial of service or possibly execute arbitrary code.

tags | advisory, denial of service, overflow, arbitrary
systems | linux, ubuntu
advisories | CVE-2019-18397
MD5 | 5d57502952a2f3da4372071a72fa562b
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