Bug 1464686
| Summary: | Illegal address access in append_acs function in ncurses tool with latest verison(6.0) | ||||||
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| Product: | Red Hat Enterprise Linux 7 | Reporter: | owl337 <v.owl337> | ||||
| Component: | ncurses | Assignee: | Miroslav Lichvar <mlichvar> | ||||
| Status: | CLOSED DUPLICATE | QA Contact: | BaseOS QE - Apps <qe-baseos-apps> | ||||
| Severity: | urgent | Docs Contact: | |||||
| Priority: | unspecified | ||||||
| Version: | 7.5-Alt | CC: | amaris, dickey, jkejda | ||||
| Target Milestone: | rc | ||||||
| Target Release: | --- | ||||||
| Hardware: | x86_64 | ||||||
| OS: | Linux | ||||||
| Whiteboard: | |||||||
| Fixed In Version: | Doc Type: | If docs needed, set a value | |||||
| Doc Text: | Story Points: | --- | |||||
| Clone Of: | Environment: | ||||||
| Last Closed: | 2017-07-26 13:17:37 UTC | Type: | Bug | ||||
| Regression: | --- | Mount Type: | --- | ||||
| Documentation: | --- | CRM: | |||||
| Verified Versions: | Category: | --- | |||||
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |||||
| Cloudforms Team: | --- | Target Upstream Version: | |||||
| Embargoed: | |||||||
| Bug Depends On: | |||||||
| Bug Blocks: | 1473306 | ||||||
| Attachments: |
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Severity medium (fix will appear in the weekly updates). *** Bug 1473306 has been marked as a duplicate of this bug. *** *** This bug has been marked as a duplicate of bug 1473306 *** |
Created attachment 1291506 [details] Triggered by "captoinfo POC3" Description of problem: In append_acs function(parse_entry.c:57), the value of tp->Strings[409] was written as 0xffffffffff in the preceding function that led to illegal address access crash. Version-Release number of selected component (if applicable): <=6.0 How reproducible: captoinfo $POC Steps to Reproduce: The debug information is as follows: $gdb captoinfo … (gdb) set args $POC (gdb) r … (gdb) bt ... #0 strlen () at ../sysdeps/x86_64/strlen.S:137 #1 0x000000000043a99a in append_acs (code=120, src=0xffffffffffffffff <error: Cannot access memory at address 0xffffffffffffffff>, dst=<optimized out>) at ../ncurses/./tinfo/parse_entry.c:574 #2 postprocess_termcap (tp=<optimized out>, has_base=<optimized out>) at ../ncurses/./tinfo/parse_entry.c:916 #3 _nc_parse_entry (entryp=0x7fffffffaf88, literal=<optimized out>, silent=<optimized out>) at ../ncurses/./tinfo/parse_entry.c:507 #4 0x00000000004317d3 in _nc_read_entry_source (fp=<optimized out>, buf=<optimized out>, literal=0, silent=<optimized out>, hook=<optimized out>) at ../ncurses/./tinfo/comp_parse.c:227 #5 0x0000000000402c57 in main (argc=<optimized out>, argv=<optimized out>) at ../progs/tic.c:929 Actual results: crash Expected results: crash Additional info: Credits: This vulnerability is detected by team OWL337, with our custom fuzzer coll AFL. Please contact ganshuitao and chaoz.cn if you need more info about the team, the tool or the vulnerability.