Vulnerabilities
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CVE Vulnerabilities

CVE-2020-29385

Loop with Unreachable Exit Condition ('Infinite Loop')

Published: Dec 26, 2020 | Modified: Apr 29, 2025
CVSS 3.x
5.5
MEDIUM
Source:
NVD
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CVSS 2.x
4.3 MEDIUM
AV:N/AC:M/Au:N/C:N/I:N/A:P
RedHat/V2
RedHat/V3
5.5 MODERATE
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Ubuntu
MEDIUM
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Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2020-29385
CWEhttps://cwe.mitre.org/data/definitions/835.html

GNOME gdk-pixbuf (aka GdkPixbuf) before 2.42.2 allows a denial of service (infinite loop) in lzw.c in the function write_indexes. if c->self_code equals 10, self->code_table[10].extends will assign the value 11 to c. The next execution in the loop will assign self->code_table[11].extends to c, which will give the value of 10. This will make the loop run infinitely. This bug can, for example, be triggered by calling this function with a GIF image with LZW compression that is crafted in a special way.

Weakness

The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop.

Affected Software

NameVendorStart VersionEnd Version
Gdk-pixbufGnome2.39.2 (excluding)2.42.2 (excluding)
Gdk-pixbufUbuntuesm-infra/focal*
Gdk-pixbufUbuntufocal*
Gdk-pixbufUbuntugroovy*
Gdk-pixbufUbuntutrusty*

References

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