Vulnerability · Published Jan 21, 2020 · Assigned by mitre
CVE-2020-7040
High 8.1
In plain English
A high-severity security flaw in the storebackup package (Debian). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.9% (higher than 87% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)8.1High
Exploit odds (30 days)2.9%top 13.1% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
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.)
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | storebackup | 3.2.1-2 | DEBIAN-CVE-2020-7040 |
| Debian:13 | storebackup | 3.2.1-2 | DEBIAN-CVE-2020-7040 |
| Debian:14 | storebackup | 3.2.1-2 | DEBIAN-CVE-2020-7040 |
Affected products (as reported)
References
- https://bugzilla.suse.com/show_bug.cgi?id=CVE-2020-7040 x_refsource_MISC
- http://www.openwall.com/lists/oss-security/2020/01/20/3 x_refsource_MISC
- [oss-security] CVE-2020-7040: storeBackup: denial of service and symlink attack vector via fixed lockfile path /tmp/storeBackup.lock mailing-list, x_refsource_MLIST
- [oss-security] 20200121 Re: CVE-2020-7040: storeBackup: denial of service and symlink attack vector via fixed lockfile path /tmp/storeBackup.lock mailing-list, x_refsource_MLIST
- [oss-security] 20200122 Re: CVE-2020-7040: storeBackup: denial of service and symlink attack vector via fixed lockfile path /tmp/storeBackup.lock mailing-list, x_refsource_MLIST
- [oss-security] 20200122 Re: CVE-2020-7040: storeBackup: denial of service and symlink attack vector via fixed lockfile path /tmp/storeBackup.lock mailing-list, x_refsource_MLIST
- [oss-security] 20200123 Re: CVE-2020-7040: storeBackup: denial of service and symlink attack vector via fixed lockfile path /tmp/storeBackup.lock mailing-list, x_refsource_MLIST
- openSUSE-SU-2020:0119 vendor-advisory, x_refsource_SUSE
- [debian-lts-announce] 20200205 [SECURITY] [DLA 2095-1] storebackup security update mailing-list, x_refsource_MLIST
- USN-4508-1 vendor-advisory, x_refsource_UBUNTU