7.4

CVE-2012-0955: canonical software-properties Improper Certificate Validation

CVSS: 7.4v3.1HighModified
AliasesDEBIAN-CVE-2012-0955
Published 02-12-2020Last modified 16-09-2024
Open JSON

Vulnerability summary

CVE-2012-0955 is a high (CVSS 7.4) Improper Certificate Validation vulnerability in canonical software-properties. EPSS estimates a 0.61% chance of exploitation in the next 30 days, higher than 48.4% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
40/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.4/10
010
High · v3.1 (NVD)
EPSS score
0.61%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Timeline

  1. 02-12-2020
    PublishedVulnerability first disclosed.
  2. 16-09-2024
    Last modifiedVulnerability information updated.

Description

software-properties was vulnerable to a person-in-the-middle attack due to incorrect TLS certificate validation in softwareproperties/ppa.py. software-properties didn't check TLS certificates under python2 and only checked certificates under python3 if a valid certificate bundle was provided. Fixed in software-properties version 0.92.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

0.61%

Chance of exploitation in the next 30 days

Percentile

48%

Versus all other CVEs

30-day change

0.00 pp

From 0.61% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.61%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (launchpad.net)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Canonical1 product
Debian1 product
  • software-properties< 0.92.25debian1

2 vendors · 2 products

References

3 links