Bug 1809295 (CVE-2020-9273) - CVE-2020-9273 proftpd: use-after-free in alloc_pool in pool.c
Summary: CVE-2020-9273 proftpd: use-after-free in alloc_pool in pool.c
Keywords:
Status: MODIFIED
Alias: CVE-2020-9273
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Nobody
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TreeView+ depends on / blocked
 
Reported: 2020-03-02 19:19 UTC by Guilherme de Almeida Suckevicz
Modified: 2023-07-07 08:29 UTC (History)
4 users (show)

Fixed In Version: proftpd-1.3.6c-1.fc31 proftpd-1.3.6c-1.fc30 proftpd-1.3.6c-1.el8
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Description Guilherme de Almeida Suckevicz 2020-03-02 19:19:47 UTC 
In ProFTPD 1.3.7, it is possible to corrupt the memory pool by interrupting the data transfer channel. This triggers a use-after-free in alloc_pool in pool.c, and possible remote code execution.

Reference:
https://github.com/proftpd/proftpd/issues/903
Comment 1 Paul Howarth 2020-03-03 08:37:06 UTC 
This is fixed in proftpd 1.3.6c:

F-31: https://bodhi.fedoraproject.org/updates/FEDORA-2020-876b1f664e
F-30: https://bodhi.fedoraproject.org/updates/FEDORA-2020-76c707cff0
EPEL-8: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2020-3483348dc1

The fix was backported to proftpd 1.3.5e for EPEL-7:
https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2020-ea579d7782

The fix was backported to proftpdd 1.3.3g for EPEL-6:
https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2020-91512b5eee
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