DescriptionA 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs944327

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
fribidi (PTS)buster1.0.5-3.1+deb10u2fixed
buster (security)1.0.5-3.1+deb10u1fixed
sid, trixie1.0.13-3fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
fribidisourcejessie(not affected)
fribidisourcestretch(not affected)


[stretch] - fribidi <not-affected> (Vulnerable code not present)
[jessie] - fribidi <not-affected> (Vulnerable code not present)
Fixed by:
Introduced by: (v1.0.0)

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