CVE-2020-25031: canonical checkinstall Link Following
CVSS: 7.8v3.1HighModified
AliasesUBUNTU-CVE-2020-25031DEBIAN-CVE-2020-25031
Published 31-08-2020Last modified 04-08-2024
Vulnerability summary
CVE-2020-25031 is a high (CVSS 7.8) Link Following vulnerability in canonical checkinstall. EPSS estimates a 0.56% chance of exploitation in the next 30 days, higher than 45.8% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
7.8/10
010
High · v3.1 (NVD)EPSS score
0.56%
0%100%
Low · +0.02 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference
Timeline
- 31-08-2020PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
checkinstall 1.6.2, when used to create a package that contains a symlink, may trigger the creation of a mode 0777 executable file.
CVSS metrics
4 scores · 3 sources · 2 versionsHigh 7.8Preferred score · NVD (NIST)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HSourcesAll 3 agree
- OSV · UbuntuEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
High 7.2Preferred score · NVD (NIST)
AV:L/AC:L/Au:N/C:C/I:C/A:CSourcesSingle source
EPSS trend
Probability
0.56%
Chance of exploitation in the next 30 days
Percentile
46%
Versus all other CVEs
30-day change
+0.02 pp
From 0.54% on 19-09-2026
19-09-202619-10-2026
EPSS score0.56%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (bugs.launchpad.net)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Canonical1 product
- checkinstall1.6.2
Debian1 product
- checkinstallAll versions (No fix recorded)
Ubuntu1 product
- checkinstallAll versions (No fix recorded)
3 vendors · 3 products
References
4 links- bugs.launchpad.net/ubuntu/+source/checkinstall/+bug/1861281X Refsource MISCREPORTExploitVendor Advisory
