DSA-1511 libicu -- variousID: oval:org.mitre.oval:def:8243 | Date: (C)2009-12-15 (M)2021-06-02 |
Class: PATCH | Family: unix |
Several local vulnerabilities have been discovered in libicu, International Components for Unicode, The Common Vulnerabilities and Exposures project identifies the following problems: libicu in International Components for Unicode (ICU) 3.8.1 and earlier attempts to process backreferences to the nonexistent capture group zero (aka \0), which might allow context-dependent attackers to read from, or write to, out-of-bounds memory locations, related to corruption of REStackFrames. Heap-based buffer overflow in the doInterval function in regexcmp.cpp in libicu in International Components for Unicode (ICU) 3.8.1 and earlier allows context-dependent attackers to cause a denial of service (memory consumption) and possibly have unspecified other impact via a regular expression that writes a large amount of data to the backtracking stack.