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CVE-2009-1358· NVD / CVE Program· CNA mitre

apt-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

Noroxi assessment

Priority: Plan (action score 41/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 4.4% (FIRST EPSS); higher than 91.2% of all records.
  • No special conditions are required; it is repeatable.
  • Fixed version: apt (Debian:12) 0.7.21; apt (Debian:4.0) 0.6.46.4-0.1+etch1; apt (Debian:5.0) 0.7.20.2+lenny1.

Add it to your regular patch cycle. Upgrade to apt (Debian:12) 0.7.21; apt (Debian:4.0) 0.6.46.4-0.1+etch1; apt (Debian:5.0) 0.7.20.2+lenny1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

apt-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error code from gpgv, which causes apt to treat a repository as valid even when it has been signed with a key that has been revoked or expired, which might allow remote attackers to trick apt into installing malicious repositories.

CriticalCVSS 10.0 · v2.0—No exploit Fix available
Published
Apr 21, 2009
Updated
Jun 16, 2026
EPSS
4.5% · 91th percentile
CWE
—

Report tools

JSON

Action score

41

Plan

Add it to your regular patch cycle.

CVSS
40 / 40 · 10.0 / 10
CISA KEV
0 / 30 · Not listed
EPSS
1 / 30 · 4.5%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
debianadvanced package tool
debianapt

Affected versions

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

  • debian advanced package toolup to 0.7.20 inclusive
  • debian advanced package tool0.7.0
  • debian advanced package tool0.7.1
  • debian advanced package tool0.7.10
  • debian advanced package tool0.7.11
  • debian advanced package tool0.7.12
  • debian advanced package tool0.7.13
  • debian advanced package tool0.7.14
  • debian advanced package tool0.7.15
  • debian advanced package tool0.7.16
  • debian advanced package tool0.7.17
  • debian advanced package tool0.7.18
  • debian advanced package tool0.7.19
  • debian advanced package tool0.7.2
  • debian advanced package tool0.7.2-0.1
  • debian advanced package tool0.7.20.1
  • debian advanced package tool0.7.20.2
  • debian advanced package tool0.7.21
  • debian apt0.0.1
  • debian apt0.0.10

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12aptbefore 0.7.210.7.21
Debian:4.0aptbefore 0.6.46.4-0.1+etch10.6.46.4-0.1+etch1
Debian:5.0aptbefore 0.7.20.2+lenny10.7.20.2+lenny1
Debian:6.0aptbefore 0.7.20.2+squeeze10.7.20.2+squeeze1

Same product

debian: all records

Other highest-scoring records for the same primary product.

  • 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
  • CVE-2014-0488APT before 1.0.9 does not "invalidate repository data" when moving from an unauthenticated to authenticated state, which allows remote attac
    28Monitor

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:apt0.7.21 · 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

  • No special conditions are required; it is repeatable.

If successful

Confidentiality
C · data can be read
Integrity
C · data or configuration can be modified
Availability
C · the service can be disrupted
Attack complexity
Low
Confidentiality impact
C
Integrity impact
C
Availability impact
C

Weakness class (CWE)

—

CVSS vector

AV:N/AC:L/Au:N/C:C/I:C/A:C

nvd-primary

Attack context

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

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (8 more)

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

All records