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CVE-2016-1252

30
FAUCET Score

CVE-2016-1252 describes a man-in-the-middle vulnerability in the apt package affecting Debian and Ubuntu distributions. This flaw allows attackers to bypass repository-signing protection by exploiting improper error handling during InRelease file signature validation. Rated Medium severity (CVSS 5.9), it has a high impact on integrity with low attack complexity, requiring no user interaction. While not actively exploited in the wild and not on the KEV catalog, a proof-of-concept exploit exists on ExploitDB, though there is minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.0.9.8.4CPE matchmatch criteria
cpe:2.3:a:debian:advanced_package_tool:*:*:*:*:*:*:*:*
14.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*
16.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
16.10CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:16.10:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.9MEDIUM

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
7.31%
Probability of exploitation in next 30 days
EPSS Percentile
93.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
ExploitDB: EDB-40916 · Dec 14, 2016
This CVE's current EPSS score of 0.0731 is in the 93rd percentile among its peer group of 19,954 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

debianvendor investigatingvia nvd_reference
View patch

References

packetstormsecurity.com / files/140145/apt-Repository-Signing-Bypass.html
Issue TrackingThird Party AdvisoryVDB Entry
bugs.chromium.org / p/project-zero/issues/detail
ExploitIssue TrackingThird Party Advisory
bugs.launchpad.net / ubuntu/+source/apt/+bug/1647467
ExploitIssue TrackingThird Party Advisory
debian.org / security/2016/dsa-3733
Issue TrackingVendor Advisory
exploit-db.com / exploits/40916
ExploitIssue TrackingThird Party AdvisoryVDB Entry
ubuntu.com / usn/USN-3156-1
Third Party Advisory