BlackTreeCVE Intelligence
← Back to the CVE catalogue
Full vulnerability report · 2021
CVE-2021-30471High confidence

A flaw was found in PoDoFo 0.9.7

Unknown · podofo

5.5MediumCVSS 3.1
Recommended action
Within 7 days

Medium technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance.

Patch available
R
Operational reassessment

Published severity in operational context

Open reassessment dashboard →
Published severityMediumOperational priority:Medium, unchanged from published severity.unchanged

Evidence used

  • No CISA KEV confirmation is currently recorded.
  • A structured source references public exploit or proof-of-concept material.
  • EPSS is 0.73% for the current model date.

Compensating controls

  • Validate the affected product branch and deploy the verified fixed release.
  • Restrict local access and enforce least privilege on affected hosts.
  • Increase monitoring for the attack path and post-exploitation behaviour described in the report.

Verification

  1. Confirm that the asset runs Unknown podofo and falls inside the recorded affected range.
  2. Verify the installed build against the product-specific fixed version after deployment.
  3. Validate exposure, authentication requirements and compensating controls in the actual environment.
  4. Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Mitigation target: As exposure requiresRemediation target: Within 365 days

This automated reassessment organises public evidence. It does not know asset exposure, business impact or control effectiveness and does not replace CVSS or a human risk decision.

Distribution package intelligence

Release-specific package status

Debian findings are scoped to the named distribution, release and source package. An absent finding does not mean a package is unaffected.

4 package states
Repository candidate not checked

A published vendor fix does not prove that a matching update is enabled and installable on a particular asset. Confirm the local package candidate before scheduling remediation.

Distribution releaseSource packageVendor stateFixed versionEvidence
Debian trixietrixie · sourcelibpodofoVendor fix publishedDebian records a fixed source-package version for this release.0.9.8+dfsg-1Debian Security Tracker ↗Source updated 6 Oct 2026
Debian bookwormbookworm · sourcelibpodofoVendor fix publishedDebian records a fixed source-package version for this release.0.9.8+dfsg-1Debian Security Tracker ↗Source updated 6 Oct 2026
Debian forkyforky · sourcelibpodofoVendor fix publishedDebian records a fixed source-package version for this release.0.9.8+dfsg-1Debian Security Tracker ↗Source updated 6 Oct 2026
Debian sidsid · sourcelibpodofoVendor fix publishedDebian records a fixed source-package version for this release.0.9.8+dfsg-1Debian Security Tracker ↗Source updated 6 Oct 2026
Direct vendor intelligence

Authoritative vendor CSAF and VEX advisories

Structured product status and remediation from the issuing vendor. Product-state explanations are always visible; large lists can be searched or downloaded.

1 current
CVE-2021-30471 · CSAF 2.0 · revision 13 · interimSUSE Product Security TeamCVE-2021-30471
26 known affected

The vendor explicitly identifies these products as affected by this CVE.

  • podofo as component of SUSE Linux Enterprise High Performance Computing 12 SP5
  • libpodofo0_9_6 as component of SUSE Linux Enterprise Module for Package Hub 15 SP4
  • podofo as component of SUSE Linux Enterprise Module for Package Hub 15 SP4
  • libpodofo-devel as component of SUSE Linux Enterprise Module for Package Hub 15 SP5
  • libpodofo0_9_6 as component of SUSE Linux Enterprise Module for Package Hub 15 SP5
  • podofo as component of SUSE Linux Enterprise Module for Package Hub 15 SP5
  • libpodofo-devel as component of SUSE Linux Enterprise Module for Package Hub 15 SP6
  • libpodofo0_9_6 as component of SUSE Linux Enterprise Module for Package Hub 15 SP6
  • podofo as component of SUSE Linux Enterprise Module for Package Hub 15 SP6
  • libpodofo-devel as component of SUSE Linux Enterprise Module for Package Hub 15 SP7
  • libpodofo0_9_6 as component of SUSE Linux Enterprise Module for Package Hub 15 SP7
  • podofo as component of SUSE Linux Enterprise Module for Package Hub 15 SP7
Summary
A flaw was found in PoDoFo 0.9.7. An uncontrolled recursive call in PdfNamesTree::AddToDictionary function in src/podofo/doc/PdfNamesTree.cpp can lead to a stack overflow.
Remediation
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Choose official national sources for this report. Each advisory shows its original language. Your selection is remembered on this device and included in shared links.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2021-17394

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionWithin 7 days

Medium technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance.

Patch available
01

What, why and how

A flaw was found in PoDoFo 0.9.7. An uncontrolled recursive call in PdfNamesTree::AddToDictionary function in src/podofo/doc/PdfNamesTree.cpp can lead to a stack overflow.

What

A flaw was found in PoDoFo 0.9.7. An uncontrolled recursive call in PdfNamesTree::AddToDictionary function in src/podofo/doc/PdfNamesTree.cpp can lead to a stack overflow.

Why

The product does not properly control the amount of recursion that takes place, consuming excessive resources, such as allocated memory or the program stack.

How

An attacker operating through local access may attempt exploitation without authentication after a user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

A flaw was found in PoDoFo 0.9.7. An uncontrolled recursive call in PdfNamesTree::AddToDictionary function in src/podofo/doc/PdfNamesTree.cpp can lead to a stack overflow.

Why

The product does not properly control the amount of recursion that takes place, consuming excessive resources, such as allocated memory or the program stack.

How

An attacker operating through local access may attempt exploitation without authentication after a user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
Reference recorded

A structured CVE source labels at least one public reference as exploit material. BlackTree has not independently validated that it is safe, reliable or weaponised.

Likely attack path
local access → Uncontrolled Recursion → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Local
Privileges required
None: unauthenticated exploitation is possible
User interaction
Required interaction required
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Unchanged: impact remains within the vulnerable component's security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-674 ↗

CWE-674: Uncontrolled Recursion. The product does not properly control the amount of recursion that takes place, consuming excessive resources, such as allocated memory or the program stack.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVLocalAttack vector: The attacker needs local access to the vulnerable system.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing privileges.UIRequiredUser interaction: Another user must perform an action for exploitation to succeed.SUnchangedScope: The security impact remains within the vulnerable component's authority.CNoneConfidentiality impact: No direct loss is represented by this metric.INoneIntegrity impact: No direct loss is represented by this metric.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land
The issue can support a local privilege or sandbox boundary transition; normal system utilities may then be available in the gained context.
UnauthenticatedCWE-674Public exploit reference
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

Cyber Security Agency of Singapore · English · CSA-SB-20210602Security Bulletin 02 Jun 2021

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 02 Jun 2021, published on 2 June 2021. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2021-007475PoDoFo における再帰制御に関する脆弱性

PoDoFo には、再帰制御に関する脆弱性が存在します。

Official advisory ↗
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Patch available
Affected
Fixed
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Action
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Workaround
No verified workaround is recorded. Limit untrusted access and use least privilege until authoritative guidance is available.
04

Evidence and provenance

Published 26 May 2021 · Last source change 3 Aug 2024, 22:32 UTC · CWE-674 · Uncontrolled Recursion

CVE recordCVE.org · 5.1
CVSS sourceNIST NVD
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2021-17394
Product sourceVendor CSAF · SUSE Product Security Team
Remediation sourceVendor CSAF · SUSE Product Security Team
CWE sourceCNA
NVD statusNVD modified after enrichment

Missing structured fields: affected product. Missing data is not evidence of low risk; review the primary advisory.

Material change intelligence

What changed after publication

View recent updates ↗
  1. Remediation statusRemediation status changed from Patch available to Mitigation available.
    Before
    Patch available
    After
    Mitigation available
    SUSE Product Security Team ↗
  2. Affected versionsThe structured affected or fixed version information changed.
    Before
    libpodofo-devel as component of SUSE Linux Enterprise High Performance Computing 12 SP5; podofo as component of SUSE Linux Enterprise High Performance Computing 12 SP5; libpodofo0_9_6 as component of SUSE Linux Enterprise Module for Package Hub 15 SP4; podofo as component of SUSE Linux Enterprise Module for Package Hub 15 SP4; libpodofo-devel as component of SUSE Linux Enterprise Module for Package Hub 15 SP5; libpodofo0_9_6 as component of SUSE Linux Enterprise Module for Package Hub 15 SP5; podofo as component of SUSE Linux Enterprise Module for Package Hub 15 SP5; libpodofo-devel as component of SUSE Linux Enterprise Module for Package Hub 15 SP6; libpodofo0_9_6 as component of SUSE Linux Enterprise Module for Package Hub 15 SP6; podofo as component of SUSE Linux Enterprise Module for Package Hub 15 SP6; libpodofo-devel as component of SUSE Linux Enterprise Module for Package Hub 15 SP7; libpodofo0_9_6 as component of SUSE Linux Enterprise Module for Package Hub 15 SP7; podofo as component of SUSE Linux Enterprise Module for Package Hub 15 SP7; libpodofo-devel as component of SUSE Linux Enterprise Server 12 SP5-LTSS; podofo as component of SUSE Linux Enterprise Server 12 SP5-LTSS; libpodofo-devel as component of SUSE Linux Enterprise Server 12 SP5; libpodofo0_9_2 as component of SUSE Linux Enterprise Server 12 SP5; podofo as component of SUSE Linux Enterprise Server 12 SP5; libpodofo-devel as component of SUSE Linux Enterprise Server LTSS Extended Security 12 SP5; podofo as component of SUSE Linux Enterprise Server LTSS Extended Security 12 SP5; libpodofo-devel as component of SUSE Linux Enterprise Server for SAP Applications 12 SP5; libpodofo0_9_2 as component of SUSE Linux Enterprise Server for SAP Applications 12 SP5; podofo as component of SUSE Linux Enterprise Server for SAP Applications 12 SP5; libpodofo0_9_2 as component of SUSE Linux Enterprise Workstation Extension 12 SP5; podofo as component of SUSE Linux Enterprise Workstation Extension 12 SP5; libpodofo-devel as component of openSUSE Leap 15.5; libpodofo0_9_6 as component of openSUSE Leap 15.5; podofo as component of openSUSE Leap 15.5; libpodofo-devel as component of openSUSE Leap 15.6; libpodofo0_9_6 as component of openSUSE Leap 15.6; and 1 more · Fixed: libpodofo-devel-0.9.2-3.24.1 as component of SUSE Linux Enterprise Server 12 SP5-LTSS; libpodofo-devel-0.9.2-3.24.1 as component of SUSE Linux Enterprise Server LTSS Extended Security 12 SP5
    After
    podofo as component of SUSE Linux Enterprise High Performance Computing 12 SP5; libpodofo0_9_6 as component of SUSE Linux Enterprise Module for Package Hub 15 SP4; podofo as component of SUSE Linux Enterprise Module for Package Hub 15 SP4; libpodofo-devel as component of SUSE Linux Enterprise Module for Package Hub 15 SP5; libpodofo0_9_6 as component of SUSE Linux Enterprise Module for Package Hub 15 SP5; podofo as component of SUSE Linux Enterprise Module for Package Hub 15 SP5; libpodofo-devel as component of SUSE Linux Enterprise Module for Package Hub 15 SP6; libpodofo0_9_6 as component of SUSE Linux Enterprise Module for Package Hub 15 SP6; podofo as component of SUSE Linux Enterprise Module for Package Hub 15 SP6; libpodofo-devel as component of SUSE Linux Enterprise Module for Package Hub 15 SP7; libpodofo0_9_6 as component of SUSE Linux Enterprise Module for Package Hub 15 SP7; podofo as component of SUSE Linux Enterprise Module for Package Hub 15 SP7; podofo as component of SUSE Linux Enterprise Server 12 SP5-LTSS; libpodofo0_9_2 as component of SUSE Linux Enterprise Server 12 SP5; podofo as component of SUSE Linux Enterprise Server 12 SP5; podofo as component of SUSE Linux Enterprise Server LTSS Extended Security 12 SP5; libpodofo0_9_2 as component of SUSE Linux Enterprise Server for SAP Applications 12 SP5; podofo as component of SUSE Linux Enterprise Server for SAP Applications 12 SP5; libpodofo0_9_2 as component of SUSE Linux Enterprise Workstation Extension 12 SP5; podofo as component of SUSE Linux Enterprise Workstation Extension 12 SP5; libpodofo-devel as component of openSUSE Leap 15.5; libpodofo0_9_6 as component of openSUSE Leap 15.5; podofo as component of openSUSE Leap 15.5; libpodofo-devel as component of openSUSE Leap 15.6; libpodofo0_9_6 as component of openSUSE Leap 15.6; podofo as component of openSUSE Leap 15.6
    SUSE Product Security Team ↗
  3. Affected versionsThe structured affected or fixed version information changed.
    Before
    PoDoFo 0.9.7 · Fixed: An authoritative update reference is available, but the fixed version is not recorded in the structured CVE fields. Check the linked vendor advisory for the applicable release.
    After
    PoDoFo 0.9.7 · Fixed: To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
    SUSE Product Security Team ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Fixed release or patch reference recorded
Fixed release recorded from official guidance
Remediation guidance recorded
ENISA EUVD · EUVD-2021-17394↗SUSE Product Security Team security advisory↗Public exploit reference↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2021-30471 · cve.blacktree.nl