spamassassin: command injection via crafted configuration file
Published Jan 30, 2020
8.1
HIGHCVSS 3.1
EPSS 7.05%
Description
A command execution issue was found in Apache SpamAssassin prior to 3.4.3. Carefully crafted nefarious rule configuration (.cf) files can be configured to run system commands similar to CVE-2018-11805. With this bug unpatched, exploits can be injected in a number of scenarios including the same privileges as spamd is run which may be elevated though doing so remotely is difficult. In addition to upgrading to SA 3.4.4, we again recommend that users should only use update channels or 3rd party .cf files from trusted places. If you cannot upgrade, do not use 3rd party rulesets, do not use sa-compile and do not run spamd as an account with elevated privileges.
Affected products
-
Affected
- prior to 3.4.3
Default status is the baseline for the product. Each version can override it (patched versions can be marked unaffected).
| Vendor | Product | Default status | Versions |
|---|---|---|---|
| Apache Software Foundation | Apache SpamAssassin | unknown | Affected
|
- < 3.4.3
No data.
Red Hat Enterprise Linux 8
spamassassin-0:3.4.2-10.el8
Fixed · RHSA-2020:4625
Red Hat Enterprise Linux 5
spamassassin
Out of support scope
Red Hat Enterprise Linux 6
spamassassin
Out of support scope
Red Hat Enterprise Linux 7
spamassassin
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 8 | spamassassin-0:3.4.2-10.el8 | Fixed | RHSA-2020:4625 |
| Red Hat Enterprise Linux 5 | spamassassin | Out of support scope | n/a |
| Red Hat Enterprise Linux 6 | spamassassin | Out of support scope | n/a |
| Red Hat Enterprise Linux 7 | spamassassin | Will not fix | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
The attack is triggered by malicious specially crafted .cf files which are basically configuration files for spamassasin. These files can be located at: 1. /usr/share/spamassassin 2. /etc/mail/spamassassin 3. user's home directory, in a directory called .spamassassin All of these locations can only be accessed by either the system administrator or by a user having a local shell account on the machine. In order to successfully exploit this flaw, the attacker needs to convince the user to place the malicious configuration files in one of the above locations.
References (15)
- http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00003.html vendor-advisoryx_refsource_SUSE
- https://access.redhat.com/security/cve/CVE-2020-1930 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1802977 Issue Tracking
- https://bz.apache.org/SpamAssassin/show_bug.cgi?id=7648 x_refsource_CONFIRMPermissions Required
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2020-12746 Advisory
- https://lists.apache.org/thread.html/r6729f3d3be754a06c39bb4f11c925a3631e8ea2b4c865546d755cb0a%40%3Cannounce.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.debian.org/debian-lts-announce/2020/02/msg00015.html mailing-listx_refsource_MLIST
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/B7SY2LUSH2X3IUXN4EQQ5A6QVUFYIV3D/ vendor-advisoryx_refsource_FEDORA
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VOVVKFP2G2AF5GHAB4WMHOEX76A3H6CE/ vendor-advisoryx_refsource_FEDORA
- https://nvd.nist.gov/vuln/detail/CVE-2020-1930
- https://seclists.org/bugtraq/2020/Feb/1 mailing-listx_refsource_BUGTRAQ
- https://usn.ubuntu.com/4265-1/ vendor-advisoryx_refsource_UBUNTU
- https://usn.ubuntu.com/4265-2/ vendor-advisoryx_refsource_UBUNTU
- https://www.cve.org/CVERecord?id=CVE-2020-1930
- https://www.debian.org/security/2020/dsa-4615 vendor-advisoryx_refsource_DEBIAN
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