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Bug 2040476

Summary: openssl x509 -email crashes with double free or corruption (fasttop)
Product: Red Hat Enterprise Linux 7 Reporter: Michael Buchfink <michael.buchfink>
Component: opensslAssignee: Sahana Prasad <sahana>
Status: CLOSED DUPLICATE QA Contact: BaseOS QE Security Team <qe-baseos-security>
Severity: high Docs Contact:
Priority: unspecified    
Version: 7.9Flags: pm-rhel: mirror+
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: 2022-01-14 09:03:54 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:

Description Michael Buchfink 2022-01-13 18:58:14 UTC 
Description of problem:
When parsing a x509 certificate for entry email openssl crashes with double free or corruption (fasttop)

Version-Release number of selected component (if applicable):
openssl-1.0.2k-23.el7_9.x86_64

How reproducible:
Always

Steps to Reproduce:
1. openssl req -x509 -newkey rsa -keyout key.pem -out cert.pem -nodes \
   -subj '/CN=localhost' -extensions san \
   -config <(echo '[req]'; echo 'distinguished_name=req'; echo '[san]'; echo 'subjectAltName=email:test@localhost')
2. openssl x509 -noout -email -in cert.pem

Actual results:
*** Error in `openssl': double free or corruption (fasttop): 0x0000000001f101e0 ***
======= Backtrace: =========
/lib64/libc.so.6(+0x81329)[0x7f508880c329]
/lib64/libcrypto.so.10(CRYPTO_free+0x1d)[0x7f5088fe196d]
/lib64/libcrypto.so.10(sk_pop_free+0x30)[0x7f5089099360]
/lib64/libcrypto.so.10(+0x170ed5)[0x7f50890e3ed5]
/lib64/libcrypto.so.10(+0x170fb2)[0x7f50890e3fb2]
/lib64/libcrypto.so.10(X509_get1_email+0x2d)[0x7f50890e401d]
openssl[0x43393c]
openssl[0x41a708]
openssl[0x41a3fe]
/lib64/libc.so.6(__libc_start_main+0xf5)[0x7f50887ad555]
openssl[0x41a4c3]
======= Memory map: ========
00400000-00480000 r-xp 00000000 fd:00 8048                               /usr/bin/openssl
00680000-00681000 r--p 00080000 fd:00 8048                               /usr/bin/openssl
00681000-00687000 rw-p 00081000 fd:00 8048                               /usr/bin/openssl
00687000-00688000 rw-p 00000000 00:00 0
01e9a000-01f81000 rw-p 00000000 00:00 0                                  [heap]
...

Expected results:
test@localhost

Additional info:
Workaround: Downgrade to openssl-1.0.2k-22.el7_9 and openssl-libs-1.0.2k-22.el7_9
Comment 3 Sahana Prasad 2022-01-14 09:03:54 UTC 

*** This bug has been marked as a duplicate of bug 2039993 ***