CVE-2019-18397: Buffer Overflow
First published: Tue Nov 05 2019(Updated: )
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.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/fribidi | <=1.0.7-1<=1.0.5-3.1 | 1.0.5-3.1+deb10u1 1.0.7-1.1 |
| GNU FriBidi | >=1.0.0<=1.0.7 | |
| Debian Debian Linux | =10.0 | |
| Debian Debian Linux | =8.0 | |
| Debian Debian Linux | =9.0 | |
| debian/fribidi | 1.0.8-2+deb11u1 1.0.8-2.1 1.0.15-1 |
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Reference Links
- https://security-tracker.debian.org/tracker/CVE-2019-18397
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-18397
- https://github.com/fribidi/fribidi/commit/034c6e9a1d296286305f4cfd1e0072b879f52568
- https://salsa.debian.org/debian/fribidi/merge_requests/2
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=944327
- https://github.com/fribidi/fribidi/commit/f20b6480b9cd46dae8d82a6f95d9c53558fcfd20
- 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://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://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1781219
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1781218
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1768750#c0
- https://github.com/fribidi/fribidi/commit/d989590e124ad995de3598800c8835d819fadf80
- https://access.redhat.com/security/cve/cve-2019-18397
- https://bugzilla.redhat.com/show_bug.cgi?id=1768750
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/W5UJRTG32FDNI7T637Q6PZYL3UCRR5HR/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TFS3N6KKXPI6ATDNEUFRSLX7R6BOBNIP/
Frequently Asked Questions
What is the vulnerability ID for this issue?
The vulnerability ID for this issue is CVE-2019-18397.
What is the severity of CVE-2019-18397?
CVE-2019-18397 has a severity score of 7.8, which is considered high.
Which software is affected by CVE-2019-18397?
The software affected by CVE-2019-18397 is GNU FriBidi through versions 1.0.7.
How can an attacker exploit CVE-2019-18397?
An attacker can exploit CVE-2019-18397 by delivering crafted text content to a user, which when rendered by an application, can cause a denial of service or possibly execute arbitrary code.
Is there a fix available for CVE-2019-18397?
Yes, there are fixes available for CVE-2019-18397. The recommended versions to remediate the vulnerability are 1.0.5-3.1+deb10u1 and 1.0.7-1.1.
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