How severe is CVE-2012-5356?

CVE-2012-5356 has a CVSS 2.0 base score of 5.8, rated medium severity.

Is CVE-2012-5356 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2012-5356?

CVE-2012-5356 primarily affects Canonical Ubuntu Software Properties. In total, 52 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2012-5356?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2012-5356 published?

CVE-2012-5356 was published on 2012-10-10 and last updated on 2026-06-16.

CVE-2012-5356

CVE-2012-5356 is a medium-severity vulnerability in Canonical Ubuntu Software Properties with a CVSS 2.0 base score of 5.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: Medium (CVSS 2.0 base score 5.8)
EPSS exploit prediction: 2% (78th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Canonical Ubuntu Software Properties
Published: 2012-10-10
Last modified: 2026-06-16

Description

The apt-add-repository tool in Ubuntu Software Properties 0.75.x before 0.75.10.3, 0.80.x before 0.80.9.2, 0.81.x before 0.81.13.5, 0.82.x before 0.82.7.3, and 0.92.x before 0.92.8 does not properly check PPA GPG keys imported from a keyserver, which allows remote attackers to install arbitrary package repository GPG keys via a man-in-the-middle (MITM) attack.

Frequently asked questions

What is CVE-2012-5356?: The apt-add-repository tool in Ubuntu Software Properties 0.75.x before 0.75.10.3, 0.80.x before 0.80.9.2, 0.81.x before 0.81.13.5, 0.82.x before 0.82.7.3, and 0.92.x before 0.92.8 does not properly check PPA GPG keys imported from a keyserver, which allows remote attackers to install arbitrary package repository GPG keys via a man-in-the-middle (MITM) attack.
How severe is CVE-2012-5356?: CVE-2012-5356 has a CVSS 2.0 base score of 5.8, rated medium severity.
Is CVE-2012-5356 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2012-5356?: CVE-2012-5356 primarily affects Canonical Ubuntu Software Properties. In total, 52 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2012-5356?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2012-5356 published?: CVE-2012-5356 was published on 2012-10-10 and last updated on 2026-06-16.

References

Affected products (52)

cpe:2.3:a:canonical:ubuntu_software_properties:0.75.4:*:*:*:*:*:*:*
cpe:2.3:a:canonical:ubuntu_software_properties:0.75.5:*:*:*:*:*:*:*
cpe:2.3:a:canonical:ubuntu_software_properties:0.75.6:*:*:*:*:*:*:*
cpe:2.3:a:canonical:ubuntu_software_properties:0.75.7:*:*:*:*:*:*:*
cpe:2.3:a:canonical:ubuntu_software_properties:0.75.8:*:*:*:*:*:*:*
cpe:2.3:a:canonical:ubuntu_software_properties:0.75.9:*:*:*:*:*:*:*
cpe:2.3:a:canonical:ubuntu_software_properties:0.75.10:*:*:*:*:*:*:*
cpe:2.3:a:canonical:ubuntu_software_properties:0.75.10.1:*:*:*:*:*:*:*
cpe:2.3:a:canonical:ubuntu_software_properties:0.75.10.2:*:*:*:*:*:*:*
cpe:2.3:a:canonical:ubuntu_software_properties:0.80:*:*:*:*:*:*:*
cpe:2.3:a:canonical:ubuntu_software_properties:0.80.2:*:*:*:*:*:*:*
cpe:2.3:a:canonical:ubuntu_software_properties:0.80.3:*:*:*:*:*:*:*
cpe:2.3:a:canonical:ubuntu_software_properties:0.80.4:*:*:*:*:*:*:*
cpe:2.3:a:canonical:ubuntu_software_properties:0.80.5:*:*:*:*:*:*:*
cpe:2.3:a:canonical:ubuntu_software_properties:0.80.6:*:*:*:*:*:*:*
cpe:2.3:a:canonical:ubuntu_software_properties:0.80.7:*:*:*:*:*:*:*
cpe:2.3:a:canonical:ubuntu_software_properties:0.80.8:*:*:*:*:*:*:*
cpe:2.3:a:canonical:ubuntu_software_properties:0.80.9:*:*:*:*:*:*:*
cpe:2.3:a:canonical:ubuntu_software_properties:0.80.9.1:*:*:*:*:*:*:*
cpe:2.3:a:canonical:ubuntu_software_properties:0.81:*:*:*:*:*:*:*
cpe:2.3:a:canonical:ubuntu_software_properties:0.81.1:*:*:*:*:*:*:*
cpe:2.3:a:canonical:ubuntu_software_properties:0.81.2:*:*:*:*:*:*:*
cpe:2.3:a:canonical:ubuntu_software_properties:0.81.3:*:*:*:*:*:*:*
cpe:2.3:a:canonical:ubuntu_software_properties:0.81.4:*:*:*:*:*:*:*
cpe:2.3:a:canonical:ubuntu_software_properties:0.81.5:*:*:*:*:*:*:*
cpe:2.3:a:canonical:ubuntu_software_properties:0.81.6:*:*:*:*:*:*:*
cpe:2.3:a:canonical:ubuntu_software_properties:0.81.7:*:*:*:*:*:*:*
cpe:2.3:a:canonical:ubuntu_software_properties:0.81.8:*:*:*:*:*:*:*
cpe:2.3:a:canonical:ubuntu_software_properties:0.81.9:*:*:*:*:*:*:*
cpe:2.3:a:canonical:ubuntu_software_properties:0.81.10:*:*:*:*:*:*:*
cpe:2.3:a:canonical:ubuntu_software_properties:0.81.11:*:*:*:*:*:*:*
cpe:2.3:a:canonical:ubuntu_software_properties:0.81.13:*:*:*:*:*:*:*
cpe:2.3:a:canonical:ubuntu_software_properties:0.81.13.1:*:*:*:*:*:*:*
cpe:2.3:a:canonical:ubuntu_software_properties:0.81.13.2:*:*:*:*:*:*:*
cpe:2.3:a:canonical:ubuntu_software_properties:0.81.13.3:*:*:*:*:*:*:*
cpe:2.3:a:canonical:ubuntu_software_properties:0.81.13.4:*:*:*:*:*:*:*
cpe:2.3:a:canonical:ubuntu_software_properties:0.82:*:*:*:*:*:*:*
cpe:2.3:a:canonical:ubuntu_software_properties:0.82.2:*:*:*:*:*:*:*
cpe:2.3:a:canonical:ubuntu_software_properties:0.82.3:*:*:*:*:*:*:*
cpe:2.3:a:canonical:ubuntu_software_properties:0.82.4:*:*:*:*:*:*:*

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