[ASA-202101-18] opensmtpd: multiple issues
foxboron at archlinux.org
Fri Jan 15 21:09:08 UTC 2021
Arch Linux Security Advisory ASA-202101-18
Date : 2021-01-12
CVE-ID : CVE-2020-35679 CVE-2020-35680
Package : opensmtpd
Type : multiple issues
Remote : Yes
Link : https://security.archlinux.org/AVG-1381
The package opensmtpd before version 6.8.0p2-1 is vulnerable to
multiple issues including information disclosure and denial of service.
Upgrade to 6.8.0p2-1.
# pacman -Syu "opensmtpd>=6.8.0p2-1"
The problems have been fixed upstream in version 6.8.0p2.
- CVE-2020-35679 (information disclosure)
smtpd/table.c in OpenSMTPD before 6.8.0p1 lacks a certain regfree,
which might allow attackers to trigger a "very significant" memory leak
via messages to an instance that performs many regex lookups.
- CVE-2020-35680 (denial of service)
smtpd/lka_filter.c in OpenSMTPD before 6.8.0p1, in certain
configurations, allows remote attackers to cause a denial of service
(NULL pointer dereference and daemon crash) via a crafted pattern of
client activity, because the filter state machine does not properly
maintain the I/O channel between the SMTP engine and the filters layer.
A malicious remote user might read memory or crash the service.
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