CVE-2012-0955 json
software-properties incorrectly validated TLS certificates
published 2020-12-02 5 y ago modified 2026-06-16 4 mo ago also EUVD-2012-0978
- cvss
- 6.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 49%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- canonical software-properties 0.92
- software-properties Debian 12 0.92.25debian1
debian advisories DEBIAN-CVE-2012-0955
Exploit prediction
0.61% chance of exploitation in the next 30 days, higher than 49% of all scored CVEs (FIRST EPSS, 2026-11-09).
Exploits and checks
- launchpad.net https://launchpad.net/bugs/1036839 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.8 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N |
| NVD | 3.1 | 7.4 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N |
| NVD | 2.0 | 5.8 | AV:N/AC:M/Au:N/C:P/I:P/A:N |
Affected products
- Canonical software-properties
Classification
- Weakness
-
- CWE-295 Improper Certificate Validation
References
-
code.launchpad.net
/~cyphermox/software-properties/lp1036839/+merge/119753
vendor-advisory, patch
-
launchpad.net
/bugs/1036839
vendor-advisory, exploit
Sources
- CVE List CVE-2012-0955
- NVD CVE-2012-0955
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.