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.
The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop.
| Link | Tags |
|---|---|
| https://gitlab.gnome.org/GNOME/gdk-pixbuf/-/blob/master/NEWS | release notes vendor advisory |
| https://security.gentoo.org/glsa/202012-15 | third party advisory |
| https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=977166 | third party advisory issue tracking |
| https://ubuntu.com/security/CVE-2020-29385 | third party advisory patch |
| https://gitlab.gnome.org/GNOME/gdk-pixbuf/-/issues/164 | vendor advisory |
| https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EANWYODLOJDFLMBH6WEKJJMQ5PKLEWML/ | vendor advisory mailing list third party advisory |
| https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/B5H3GNVWMZTYZR3JBYCK57PF7PFMQBNP/ | vendor advisory mailing list third party advisory |
| https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BGZVCTH5O7WBJLYXZ2UOKLYNIFPVR55D/ | vendor advisory mailing list third party advisory |