7.5 High
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
0.026 Low
EPSS
Percentile
88.7%
It was discovered that bsd-mailx, an implementation of the mail
command, had an undocumented feature which treats syntactically valid
email addresses as shell commands to execute.
Users who need this feature can re-enable it using the expandaddr in
an appropriate mailrc file. This update also removes the obsolete -T
option. An older security vulnerability, CVE-2004-2771, had already
been addressed in the Debian’s bsd-mailx package.
Note that this security update does not remove all mailx facilities
for command execution, though. Scripts which send mail to addresses
obtained from an untrusted source (such as a web form) should use the
“–” separator before the email addresses (which was fixed to work
properly in this update), or they should be changed to invoke
“mail -t” or “sendmail -i -t” instead, passing the recipient addresses
as part of the mail header.
For the oldstable distribution (squeeze), this problem has been fixed in
version 8.1.2-0.20100314cvs-1+deb6u1.
We recommend that you upgrade your bsd-mailx packages.
CPE | Name | Operator | Version |
---|---|---|---|
bsd-mailx | eq | 8.1.2-0.20100314cvs-1 |