Mandriva Linux Security Advisory – Integer overflow in the build_range function in X.Org X Font Server (xfs) before 1.0.5 allows context-dependent attackers to execute arbitrary code via (1) QueryXBitmaps and (2) QueryXExtents protocol requests with crafted size values, which triggers a heap-based buffer overflow. The swap_char2b function in X.Org X Font Server (xfs) before 1.0.5 allows context-dependent attackers to execute arbitrary code via (1) QueryXBitmaps and (2) QueryXExtents protocol requests with crafted size values that specify an arbitrary number of bytes to be swapped on the heap, which triggers heap corruption.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/60741/MDKSA-2007-210.txt
Source: https://packetstormsecurity.com/files/60741/Mandriva-Linux-Security-Advisory-2007.210.html