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Created attachment 1519858[details]
crash input files and gdb backtrace of p11-kit-0.23.5-3.el7.x86_64
Description of problem:
As subject
Version-Release number of selected component (if applicable):
p11-kit-0.23.14-4.el8.x86_64
How reproducible:
100%
Steps to Reproduce:
1. Prepare a file:
# cat /tmp/crashes/id:000000,sig:06,src:000066,op:ext_AO,pos:6
1-----BEGIN ------------#
2. Run following command:
# trust anchor /tmp/crashes/id:000000,sig:06,src:000066,op:ext_AO,pos:6
trust: trust/pem.c:87: pem_find_begin: Assertion `suff > pref' failed.
[1] 21880 abort (core dumped) trust anchor /tmp/crashes/id:000000,sig:06,src:000066,op:ext_AO,pos:6
Actual results:
As above
Expected results:
No SIGABRT
Additional info:
It could be reproduced on p11-kit-0.23.5-3.el7.x86_64 and upstream 0.23.14-27-g5e6a92b.
The crash input files and gdb backtrace of p11-kit-0.23.5-3.el7.x86_64 are in attachment.
This bug is find by afl.
Thank you for running afl against the package. However, I wouldn't call it a bug, but just an assertion failure.
As we don't compile it with NDEBUG=1 in RHEL, there shouldn't be a practical problem.
If you suggest to make the error handling more courteous, feel free to open an upstream issue.
Sorry, after a second thought, I realized that you are right: the assert condition itself is wrong and the parser should accept such PEM header. I have opened a PR:
https://github.com/p11-glue/p11-kit/pull/210
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory (Moderate: p11-kit security, bug fix, and enhancement update), and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
https://access.redhat.com/errata/RHSA-2021:1609
Created attachment 1519858 [details] crash input files and gdb backtrace of p11-kit-0.23.5-3.el7.x86_64 Description of problem: As subject Version-Release number of selected component (if applicable): p11-kit-0.23.14-4.el8.x86_64 How reproducible: 100% Steps to Reproduce: 1. Prepare a file: # cat /tmp/crashes/id:000000,sig:06,src:000066,op:ext_AO,pos:6 1-----BEGIN ------------# 2. Run following command: # trust anchor /tmp/crashes/id:000000,sig:06,src:000066,op:ext_AO,pos:6 trust: trust/pem.c:87: pem_find_begin: Assertion `suff > pref' failed. [1] 21880 abort (core dumped) trust anchor /tmp/crashes/id:000000,sig:06,src:000066,op:ext_AO,pos:6 Actual results: As above Expected results: No SIGABRT Additional info: It could be reproduced on p11-kit-0.23.5-3.el7.x86_64 and upstream 0.23.14-27-g5e6a92b. The crash input files and gdb backtrace of p11-kit-0.23.5-3.el7.x86_64 are in attachment. This bug is find by afl.