Note: This bug is displayed in read-only format because
the product is no longer active in Red Hat Bugzilla.
RHEL Engineering is moving the tracking of its product development work on RHEL 6 through RHEL 9 to Red Hat Jira (issues.redhat.com). If you're a Red Hat customer, please continue to file support cases via the Red Hat customer portal. If you're not, please head to the "RHEL project" in Red Hat Jira and file new tickets here. Individual Bugzilla bugs in the statuses "NEW", "ASSIGNED", and "POST" are being migrated throughout September 2023. Bugs of Red Hat partners with an assigned Engineering Partner Manager (EPM) are migrated in late September as per pre-agreed dates. Bugs against components "kernel", "kernel-rt", and "kpatch" are only migrated if still in "NEW" or "ASSIGNED". If you cannot log in to RH Jira, please consult article #7032570. That failing, please send an e-mail to the RH Jira admins at rh-issues@redhat.com to troubleshoot your issue as a user management inquiry. The email creates a ServiceNow ticket with Red Hat. Individual Bugzilla bugs that are migrated will be moved to status "CLOSED", resolution "MIGRATED", and set with "MigratedToJIRA" in "Keywords". The link to the successor Jira issue will be found under "Links", have a little "two-footprint" icon next to it, and direct you to the "RHEL project" in Red Hat Jira (issue links are of type "https://issues.redhat.com/browse/RHEL-XXXX", where "X" is a digit). This same link will be available in a blue banner at the top of the page informing you that that bug has been migrated.
Created attachment 1316989[details]
Triggered by " ./lou_checktable POC2 "
Description of problem:
There is a heap overflow in liblouis which is triggered at function resolveSubtable().
Version-Release number of selected component (if applicable):
<= latest version
How reproducible:
./lou_checktable POC2
Steps to Reproduce:
Normal output:
$ ./lou_checktable POC2
POC2:2: error: opcode 'incJude' not defined.
Segmentation fault
The GDB && ASAN debugging information is as follows:
gdb-peda$ r
...
Breakpoint 2, resolveSubtable (base=0x60200000ef90 "POC7", searchPath=<optimized out>, table=<optimized out>)
at compileTranslationTable.c:5030
5030 sprintf (tableFile, "%s%c%s", dir, DIR_SEP, table);
gdb-peda$ p tableFile
$3 = 0x61d00001d680 "brai", ';' <repeats 78 times>, 'd' <repeats 118 times>...
gdb-peda$ bt
#0 resolveSubtable (base=0x60200000ef90 "POC2", searchPath=<optimized out>, table=<optimized out>)
at compileTranslationTable.c:5030
#1 _lou_defaultTableResolver (tableList=<optimized out>, base=<optimized out>) at compileTranslationTable.c:5125
#2 0x00007ffff7b2cc42 in _lou_resolveTable (base=0x7ffff7fd9778 "a\036", tableList=<optimized out>)
at compileTranslationTable.c:5169
#3 includeFile (nested=<optimized out>, includedFile=<optimized out>, characterClasses=<optimized out>,
characterClassAttribute=<optimized out>, opcodeLengths=<optimized out>, newRuleOffset=<optimized out>,
newRule=<optimized out>, ruleNames=<optimized out>) at compileTranslationTable.c:5250
#4 compileRule (nested=<optimized out>, characterClasses=<optimized out>, characterClassAttribute=<optimized out>,
opcodeLengths=<optimized out>, newRuleOffset=<optimized out>, newRule=<optimized out>, ruleNames=<optimized out>)
at compileTranslationTable.c:3838
#5 0x00007ffff7b5e548 in compileFile (fileName=<optimized out>, characterClasses=<optimized out>,
characterClassAttribute=<optimized out>, opcodeLengths=<optimized out>, newRuleOffset=<optimized out>,
newRule=<optimized out>, ruleNames=<optimized out>) at compileTranslationTable.c:5208
#6 0x00007ffff7b1a80e in compileTranslationTable (tableList=<optimized out>, characterClasses=<optimized out>,
characterClassAttribute=<optimized out>, opcodeLengths=<optimized out>, newRuleOffset=<optimized out>,
newRule=<optimized out>, ruleNames=<optimized out>) at compileTranslationTable.c:5316
#7 lou_getTable (tableList=<optimized out>) at compileTranslationTable.c:5419
#8 0x00000000004dbcb0 in main (argc=<optimized out>, argv=<optimized out>, argv@entry=0x7fffffffe578)
at lou_checktable.c:121
#9 0x00007ffff6c10ac0 in __libc_start_main (main=0x4dbb00 <main>, argc=0x2, argv=0x7fffffffe578, init=<optimized out>,
fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffffffe568) at libc-start.c:289
#10 0x0000000000435749 in _start ()
gdb-peda$ n
=================================================================
==112580==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x61d00001de80 at pc 0x00000044aca8 bp 0x7ffffff7d620 sp 0x7ffffff7cdb0
WRITE of size 2102 at 0x61d00001de80 thread T0
#0 0x44aca7 (/home/icy/secreal/liblouis/install_asan/bin/lou_checktable+0x44aca7)
#1 0x44bffe (/home/icy/secreal/liblouis/install_asan/bin/lou_checktable+0x44bffe)
#2 0x7ffff7b17ce7 (/home/icy/secreal/liblouis/install_asan/lib/liblouis.so.14+0x14ce7)
#3 0x7ffff7b2cc41 (/home/icy/secreal/liblouis/install_asan/lib/liblouis.so.14+0x29c41)
#4 0x7ffff7b5e547 (/home/icy/secreal/liblouis/install_asan/lib/liblouis.so.14+0x5b547)
#5 0x7ffff7b1a80d (/home/icy/secreal/liblouis/install_asan/lib/liblouis.so.14+0x1780d)
#6 0x4dbcaf (/home/icy/secreal/liblouis/install_asan/bin/lou_checktable+0x4dbcaf)
#7 0x7ffff6c10abf (/lib/x86_64-linux-gnu/libc.so.6+0x20abf)
#8 0x435748 (/home/icy/secreal/liblouis/install_asan/bin/lou_checktable+0x435748)
0x61d00001de80 is located 0 bytes to the right of 2048-byte region [0x61d00001d680,0x61d00001de80)
allocated by thread T0 here:
#0 0x4bc712 (/home/icy/secreal/liblouis/install_asan/bin/lou_checktable+0x4bc712)
#1 0x7ffff7b17883 (/home/icy/secreal/liblouis/install_asan/lib/liblouis.so.14+0x14883)
Shadow bytes around the buggy address:
0x0c3a7fffbb80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c3a7fffbb90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c3a7fffbba0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c3a7fffbbb0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c3a7fffbbc0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x0c3a7fffbbd0:[fa]fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c3a7fffbbe0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c3a7fffbbf0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c3a7fffbc00: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c3a7fffbc10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c3a7fffbc20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Shadow byte legend (one shadow byte represents 8 application bytes):
Addressable: 00
Partially addressable: 01 02 03 04 05 06 07
Heap left redzone: fa
Heap right redzone: fb
Freed heap region: fd
Stack left redzone: f1
Stack mid redzone: f2
Stack right redzone: f3
Stack partial redzone: f4
Stack after return: f5
Stack use after scope: f8
Global redzone: f9
Global init order: f6
Poisoned by user: f7
Container overflow: fc
Array cookie: ac
Intra object redzone: bb
ASan internal: fe
Left alloca redzone: ca
Right alloca redzone: cb
==112580==ABORTING
[Inferior 1 (process 112580) exited with code 01]
Warning: not running or target is remote
gdb-peda$
The vulnerability was triggered in function:
resolveSubtable (base=0x60200000ef90 "POC7", searchPath=<optimized out>, table=<optimized out>)
at compileTranslationTable.c:5030
5025 ;
5026 last = (*cp == '\0');
5027 *cp = '\0';
5028 if (dir == cp)
5029 dir = ".";
5030 sprintf (tableFile, "%s%c%s", dir, DIR_SEP, table);
5031 if (stat (tableFile, &info) == 0 && !(info.st_mode & S_IFDIR))
5032 {
5033 _lou_logMessage(LOG_DEBUG, "found table %s", tableFile);
5034 free(searchPath_copy);
Actual results:
crash
Expected results:
crash
Additional info:
Credits:
This vulnerability is detected by team OWL337, with our custom fuzzer collAFL. Please contact ganshuitao and chaoz.cn if you need more info about the team, the tool or the vulnerability.
Comment 4RHEL Program Management
2021-01-15 07:41:24 UTC
After evaluating this issue, there are no plans to address it further or fix it in an upcoming release. Therefore, it is being closed. If plans change such that this issue will be fixed in an upcoming release, then the bug can be reopened.
Created attachment 1316989 [details] Triggered by " ./lou_checktable POC2 " Description of problem: There is a heap overflow in liblouis which is triggered at function resolveSubtable(). Version-Release number of selected component (if applicable): <= latest version How reproducible: ./lou_checktable POC2 Steps to Reproduce: Normal output: $ ./lou_checktable POC2 POC2:2: error: opcode 'incJude' not defined. Segmentation fault The GDB && ASAN debugging information is as follows: gdb-peda$ r ... Breakpoint 2, resolveSubtable (base=0x60200000ef90 "POC7", searchPath=<optimized out>, table=<optimized out>) at compileTranslationTable.c:5030 5030 sprintf (tableFile, "%s%c%s", dir, DIR_SEP, table); gdb-peda$ p tableFile $3 = 0x61d00001d680 "brai", ';' <repeats 78 times>, 'd' <repeats 118 times>... gdb-peda$ bt #0 resolveSubtable (base=0x60200000ef90 "POC2", searchPath=<optimized out>, table=<optimized out>) at compileTranslationTable.c:5030 #1 _lou_defaultTableResolver (tableList=<optimized out>, base=<optimized out>) at compileTranslationTable.c:5125 #2 0x00007ffff7b2cc42 in _lou_resolveTable (base=0x7ffff7fd9778 "a\036", tableList=<optimized out>) at compileTranslationTable.c:5169 #3 includeFile (nested=<optimized out>, includedFile=<optimized out>, characterClasses=<optimized out>, characterClassAttribute=<optimized out>, opcodeLengths=<optimized out>, newRuleOffset=<optimized out>, newRule=<optimized out>, ruleNames=<optimized out>) at compileTranslationTable.c:5250 #4 compileRule (nested=<optimized out>, characterClasses=<optimized out>, characterClassAttribute=<optimized out>, opcodeLengths=<optimized out>, newRuleOffset=<optimized out>, newRule=<optimized out>, ruleNames=<optimized out>) at compileTranslationTable.c:3838 #5 0x00007ffff7b5e548 in compileFile (fileName=<optimized out>, characterClasses=<optimized out>, characterClassAttribute=<optimized out>, opcodeLengths=<optimized out>, newRuleOffset=<optimized out>, newRule=<optimized out>, ruleNames=<optimized out>) at compileTranslationTable.c:5208 #6 0x00007ffff7b1a80e in compileTranslationTable (tableList=<optimized out>, characterClasses=<optimized out>, characterClassAttribute=<optimized out>, opcodeLengths=<optimized out>, newRuleOffset=<optimized out>, newRule=<optimized out>, ruleNames=<optimized out>) at compileTranslationTable.c:5316 #7 lou_getTable (tableList=<optimized out>) at compileTranslationTable.c:5419 #8 0x00000000004dbcb0 in main (argc=<optimized out>, argv=<optimized out>, argv@entry=0x7fffffffe578) at lou_checktable.c:121 #9 0x00007ffff6c10ac0 in __libc_start_main (main=0x4dbb00 <main>, argc=0x2, argv=0x7fffffffe578, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffffffe568) at libc-start.c:289 #10 0x0000000000435749 in _start () gdb-peda$ n ================================================================= ==112580==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x61d00001de80 at pc 0x00000044aca8 bp 0x7ffffff7d620 sp 0x7ffffff7cdb0 WRITE of size 2102 at 0x61d00001de80 thread T0 #0 0x44aca7 (/home/icy/secreal/liblouis/install_asan/bin/lou_checktable+0x44aca7) #1 0x44bffe (/home/icy/secreal/liblouis/install_asan/bin/lou_checktable+0x44bffe) #2 0x7ffff7b17ce7 (/home/icy/secreal/liblouis/install_asan/lib/liblouis.so.14+0x14ce7) #3 0x7ffff7b2cc41 (/home/icy/secreal/liblouis/install_asan/lib/liblouis.so.14+0x29c41) #4 0x7ffff7b5e547 (/home/icy/secreal/liblouis/install_asan/lib/liblouis.so.14+0x5b547) #5 0x7ffff7b1a80d (/home/icy/secreal/liblouis/install_asan/lib/liblouis.so.14+0x1780d) #6 0x4dbcaf (/home/icy/secreal/liblouis/install_asan/bin/lou_checktable+0x4dbcaf) #7 0x7ffff6c10abf (/lib/x86_64-linux-gnu/libc.so.6+0x20abf) #8 0x435748 (/home/icy/secreal/liblouis/install_asan/bin/lou_checktable+0x435748) 0x61d00001de80 is located 0 bytes to the right of 2048-byte region [0x61d00001d680,0x61d00001de80) allocated by thread T0 here: #0 0x4bc712 (/home/icy/secreal/liblouis/install_asan/bin/lou_checktable+0x4bc712) #1 0x7ffff7b17883 (/home/icy/secreal/liblouis/install_asan/lib/liblouis.so.14+0x14883) Shadow bytes around the buggy address: 0x0c3a7fffbb80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0c3a7fffbb90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0c3a7fffbba0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0c3a7fffbbb0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0c3a7fffbbc0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 =>0x0c3a7fffbbd0:[fa]fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c3a7fffbbe0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c3a7fffbbf0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c3a7fffbc00: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c3a7fffbc10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0c3a7fffbc20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 Shadow byte legend (one shadow byte represents 8 application bytes): Addressable: 00 Partially addressable: 01 02 03 04 05 06 07 Heap left redzone: fa Heap right redzone: fb Freed heap region: fd Stack left redzone: f1 Stack mid redzone: f2 Stack right redzone: f3 Stack partial redzone: f4 Stack after return: f5 Stack use after scope: f8 Global redzone: f9 Global init order: f6 Poisoned by user: f7 Container overflow: fc Array cookie: ac Intra object redzone: bb ASan internal: fe Left alloca redzone: ca Right alloca redzone: cb ==112580==ABORTING [Inferior 1 (process 112580) exited with code 01] Warning: not running or target is remote gdb-peda$ The vulnerability was triggered in function: resolveSubtable (base=0x60200000ef90 "POC7", searchPath=<optimized out>, table=<optimized out>) at compileTranslationTable.c:5030 5025 ; 5026 last = (*cp == '\0'); 5027 *cp = '\0'; 5028 if (dir == cp) 5029 dir = "."; 5030 sprintf (tableFile, "%s%c%s", dir, DIR_SEP, table); 5031 if (stat (tableFile, &info) == 0 && !(info.st_mode & S_IFDIR)) 5032 { 5033 _lou_logMessage(LOG_DEBUG, "found table %s", tableFile); 5034 free(searchPath_copy); Actual results: crash Expected results: crash Additional info: Credits: This vulnerability is detected by team OWL337, with our custom fuzzer collAFL. Please contact ganshuitao and chaoz.cn if you need more info about the team, the tool or the vulnerability.