Security readout for executives and security teams
Plain-English summary
CVE-2021-3806 affects Pardus Software Center. A nearby network attacker could interfere with traffic and cause the application to write files outside the intended location. Business risk is limited by required user interaction and network position, but file writes can affect system integrity.
Executive priority
Treat as a medium-priority Linux endpoint risk. Prioritize Pardus environments in government, education, or Turkish-language deployments. Escalate if the Software Center is widely used on untrusted networks or if vendor guidance confirms currently deployed versions are affected.
Technical view
The issue is a CWE-22 path traversal in the extractArchive function. The CVE description says a same-network man-in-the-middle could write files on the system. CVSS 3.1 is 5.3, with low confidentiality, integrity, and availability impact. Affected versions are not specified in the provided sources.
Likely exposure
Exposure is likely limited to systems running Pardus Software Center, especially when used on shared or untrusted networks. The affected version range is unspecified, so asset owners must verify against vendor advisories rather than relying on version data here.
Exploitation context
CISA KEV is false, and the provided sources do not establish active exploitation. A public researcher write-up exists. The reported scenario requires attacker network position and user interaction, reducing broad internet-scale risk but leaving targeted environments exposed.
Researcher notes
Evidence is incomplete: affected versions are unspecified, and one government reference is marked broken in the source bundle. The CVSS vector lists local attack vector, while the description highlights same-network man-in-the-middle. Validate assumptions against vendor advisories before making exposure claims.
Mitigation direction
- Check Pardus or TUBITAK guidance for affected versions and fixed releases.
- Update Pardus Software Center if vendor guidance identifies a patched version.
- Avoid using the Software Center on untrusted or shared networks until assessed.
- Restrict package management activity to trusted network paths and repositories.
- Monitor for unexpected file changes on systems using the application.
Validation and detection
- Inventory Pardus systems with Pardus Software Center installed.
- Compare installed versions against the vendor advisory when accessible.
- Review whether users operate the Software Center on shared networks.
- Check endpoint logs for suspicious file writes during Software Center use.
- Validate remediation status through standard update management records.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-22: File access and web shell behavior lookup
File traversal and upload weaknesses can lead teams to review file, web shell, execution, and collection telemetry. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupFile access behavior lookup
The CVE wording references file access or upload behavior, so file telemetry and web shell review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-3806 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L1.83.4TR-CERTVulnerability scoring details
Base CVSS 3.1 score
5.3MediumVector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://www.usom.gov.tr/bildirim/tr-21-0754CVE reference, TR-CERT · broken-link, government-resource
- https://pentest.blog/pardus-21-linux-distro-remote-code-execution-0day-2021/CVE reference, TR-CERT · x_refsource_CONFIRM
- https://siberguvenlik.gov.tr/guvenlik-bildirimleri/detay/tr-21-0754CVE reference, TR-CERT · government-resource
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.