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CVE-2011-3634· NVD / CVE Program· CNA redhat

methods/https.cc in apt before 0.8.11 accepts connections when the certificate host name fails validation and Verify-Host is enabled, which

methods/https.cc in apt before 0.8.11 accepts connections when the certificate host name fails validation and Verify-Host is enabled, which allows man-in-the-middle attackers to obtain repository credentials via unspecified vectors.

LowCVSS 2.6 · v2.0—No exploit Fix available
Published
Feb 28, 2014
Updated
Jun 16, 2026
EPSS
0.8% · 55th percentile
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Report tools

JSON

Action score

10

Monitor

Low priority for now.

CVSS
10 / 40 · 2.6 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.8%

Affected systems

VendorProduct
debianadvanced package tool
canonicalubuntu linux

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • canonical ubuntu linux10.04
  • canonical ubuntu linux10.10
  • canonical ubuntu linux11.04
  • canonical ubuntu linux8.04
  • debian advanced package toolup to 0.8.10.3 inclusive
  • debian advanced package tool0.8.0
  • debian advanced package tool0.8.1
  • debian advanced package tool0.8.10
  • debian advanced package tool0.8.10.1
  • debian advanced package tool0.8.10.2

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12aptbefore 0.8.110.8.11
Debian:6.0aptbefore 0.8.10.3+squeeze20.8.10.3+squeeze2

Same product

debian: all records

Other highest-scoring records for the same primary product.

  • CVE-2009-1358apt-get in apt before 0.7.21 does not check for the correct error code from gpgv, which causes apt to treat a repository as valid even when
    41Plan
  • CVE-2009-1300apt 0.7.20 does not check when the date command returns an "invalid date" error, which can prevent apt from loading security updates in time
    41Plan
  • CVE-2019-3462Incorrect sanitation of the 302 redirect field in HTTP transport method of apt versions 1.4.8 and earlier can lead to content injection by a
    36Monitor
  • CVE-2014-0490The apt-get download command in APT before 1.0.9 does not properly validate signatures for packages, which allows remote attackers to execut
    31Monitor
  • CVE-2014-0489APT before 1.0.9, when the Acquire::GzipIndexes option is enabled, does not validate checksums, which allows remote attackers to execute arb
    31Monitor
  • CVE-2014-0487APT before 1.0.9 does not verify downloaded files if they have been modified as indicated using the If-Modified-Since header, which has unsp
    31Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:apt0.8.11 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
P · data can be read
Integrity
none
Availability
none
Attack complexity
High
Confidentiality impact
P
Integrity impact
None
Availability impact
None

Weakness class (CWE)

CWE-200 · Exposure of Sensitive Information to an Unauthorized Actor

CVSS vector

AV:N/AC:H/Au:N/C:P/I:N/A:N

nvd-primary

Root cause

The extension requests broader permissions than its function needs and sends the data it collects out for purposes beyond its stated function.

The bug in code

The whole CWE-200 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

json
{  "permissions": ["tabs", "<all_urls>"],  "background": { "service_worker": "analytics.js" }}

Fixed

json
{  "permissions": ["activeTab"],  "host_permissions": ["https://yildiz.example/*"]}

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Noroxi analysis

No Noroxi analysis for this record yet

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Change log

  1. Fix✗ → ✓

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References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records