CVE-2020-7040 Path traversal in n/a

What is CVE-2020-7040?

CVE-2020-7040 is a high-severity path traversal vulnerability in Canonical Ubuntu Linux, published on 21 Jan 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

storeBackup.pl in storeBackup through 3.5 relies on the /tmp/storeBackup.lock pathname, which allows symlink attacks that possibly lead to privilege escalation. (Local users can also create a plain file named /tmp/storeBackup.lock to block use of storeBackup until an admin manually deletes that file.)

Weakness: CWE-59

Which versions are affected by CVE-2020-7040?

It affects 5 products.

Products include Canonical Ubuntu Linux, Debian Debian Linux, Opensuse Backports Sle, Opensuse Leap, Storebackup Storebackup.

How do I fix CVE-2020-7040?

Apply the vendor's patch.

Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.

Is CVE-2020-7040 being exploited?

There is no known exploitation of CVE-2020-7040 in the wild and no public exploit code.

Other vulnerabilities in Canonical Ubuntu Linux

• CVE-2020-11651 SaltStack Salt Authentication Bypass Exploited Critical 9.8
• CVE-2020-7247 OpenSMTPD Remote Code Execution Exploited Critical 9.8
• CVE-2019-16928 Exim Out-of-bounds Write Exploited Critical 9.8
• CVE-2018-6789 Exim Buffer Overflow Exploited Critical 9.8
• CVE-2015-2590 Oracle Java SE and Java SE Embedded Remote Code Execution Exploited Critical 9.8

All Canonical Ubuntu Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2020-7040, DLA-2095-1, GHSA-gc95-jc79-5q6h, UBUNTU-CVE-2020-7040, USN-4508-1, openSUSE-SU-2020:0119-1 and 1 more.