제출 #752603: ckolivas lrzip 0.651 NULL Pointer Dereference정보

제목ckolivas lrzip 0.651 NULL Pointer Dereference
설명I found a concurrency npd in ucompthread function.This vulnerability also exists in the latest version of the master branch 1242aec. Details can be found here: https://github.com/ckolivas/lrzip/issues/263 . The root cause of this vulnerability is that sinfo->ucthreads can be concurrently set to NULL while it is being accessed. Compile Command: ./autogen.sh CC="gcc -fsanitize=address -fno-omit-frame-pointer -g -O0" CXX="g++ -fsanitize=address -fno-omit-frame-pointer -g -O0" ./configure --enable-static-bin --disable-shared make -j4 PoC file: A crafted PoC is available here, please unzip first. Run Command: ./lrzip -t -p2 ./PoC_NPD AddressSanitizer:DEADLYSIGNAL ================================================================= ==17356==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000080 (pc 0x556a62c35ae9 bp 0x7fa73678add0 sp 0x7fa73678ac40 T3) ==17356==The signal is caused by a READ memory access. ==17356==Hint: address points to the zero page. #0 0x556a62c35ae9 in ucompthread /home/ziiiro/work/eval/vul_repro/lrzip/stream.c:1551 #1 0x7fa739baeac2 in start_thread nptl/pthread_create.c:442 #2 0x7fa739c4084f (/lib/x86_64-linux-gnu/libc.so.6+0x12684f) AddressSanitizer can not provide additional info. SUMMARY: AddressSanitizer: SEGV /home/ziiiro/work/eval/vul_repro/lrzip/stream.c:1551 in ucompthread Thread T3 created by T0 here: #0 0x7fa73a140685 in __interceptor_pthread_create ../../../../src/libsanitizer/asan/asan_interceptors.cpp:216 #1 0x556a62c3e8a6 in create_pthread /home/ziiiro/work/eval/vul_repro/lrzip/stream.c:125 #2 0x556a62c3e8a6 in fill_buffer /home/ziiiro/work/eval/vul_repro/lrzip/stream.c:1725 #3 0x556a62c3e8a6 in read_stream /home/ziiiro/work/eval/vul_repro/lrzip/stream.c:1811 #4 0x556a62c31361 in unzip_literal /home/ziiiro/work/eval/vul_repro/lrzip/runzip.c:162 #5 0x556a62c31361 in runzip_chunk /home/ziiiro/work/eval/vul_repro/lrzip/runzip.c:325 #6 0x556a62c31361 in runzip_fd /home/ziiiro/work/eval/vul_repro/lrzip/runzip.c:387 #7 0x556a62c1ffe3 in decompress_file /home/ziiiro/work/eval/vul_repro/lrzip/lrzip.c:952 #8 0x556a62c16284 in main /home/ziiiro/work/eval/vul_repro/lrzip/main.c:720 #9 0x7fa739b43d8f in __libc_start_call_main ../sysdeps/nptl/libc_start_call_main.h:58
원천⚠️ https://github.com/user-attachments/files/21726331/PoC_NPD.zip
사용자
 ziiiro (UID 93755)
제출2026. 02. 05. AM 04:41 (3 개월 ago)
모더레이션2026. 02. 08. AM 09:19 (3 days later)
상태수락
VulDB 항목344931 [ckolivas lrzip 까지 0.651 stream.c ucompthread 서비스 거부]
포인트들20

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