Evidence used
- No CISA KEV confirmation is currently recorded.
- Exploitation requires an existing local or physical foothold with privileges.
- EPSS is 0.19% for the current model date.
BlackTreeCVE IntelligenceFull vulnerability report · 2024
CVE-2024-20284High confidence
Cisco NX-OS Software Python Parser Escape Vulnerability
Cisco · Cisco NX-OS Software
Official source article: Cisco CISCO-SA-NXOS-PSBE-CE-YVBTN5DU ↗. Check the applicable product and release in the original source.
5.3MediumCVSS 3.1
Scheduled
Fix not verifiedMedium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.
R
Open reassessment dashboard →Operational reassessment
Published severity in operational context
Published severityMedium→Operational priority:Low, lowered one band.downgradedsince 28 Aug 2024
Compensating controls
- Restrict local access and enforce least privilege on affected hosts.
- Monitor vendor guidance and exploitation sources for a material change.
Verification
- Confirm that the asset runs Cisco Cisco NX-OS Software and falls inside the recorded affected range.
- Recheck the vendor advisory before scheduling a change because no verified fixed version is currently retained.
- Validate exposure, authentication requirements and compensating controls in the actual environment.
- Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.
Fix not verified01
What, why and how
A vulnerability in the Python interpreter of Cisco NX-OS Software could allow an authenticated, low-privileged, local attacker to escape the Python sandbox and gain unauthorized access to the underlying operating system of the device. The vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by manipulating specific functions within the Python interpreter. A successful exploit could allow an attacker to escape the Python sandbox and execute arbitrary commands on the underlying operating system with the privileges of the authenticated user. Note: An attacker must be authenticated with Python execution privileges to exploit these vulnerabilities. For more information regarding Python execution privileges, see product-specific documentation, such as the section of the Cisco Nexus 9000 Series NX-OS Programmability Guide.
What
A vulnerability in the Python interpreter of Cisco NX-OS Software could allow an authenticated, low-privileged, local attacker to escape the Python sandbox and gain unauthorized access to the underlying operating system of the device. The vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by manipulating specific functions within the Python interpreter. A successful exploit could allow an attacker to escape the Python sandbox and execute arbitrary commands on the underlying operating system with the privileges of the authenticated user. Note: An attacker must be authenticated with Python execution privileges to exploit these vulnerabilities. For more information regarding Python execution privileges, see product-specific documentation, such as the section of the Cisco Nexus 9000 Series NX-OS Programmability Guide.
Why
The product does not use or incorrectly uses a protection mechanism that provides sufficient defense against directed attacks against the product.
How
An attacker operating through local access may attempt exploitation with low privileges. If successful, the issue may execute code or commands in the affected security context.
What
A vulnerability in the Python interpreter of Cisco NX-OS Software could allow an authenticated, low-privileged, local attacker to escape the Python sandbox and gain unauthorized access to the underlying operating system of the device. The vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by manipulating specific functions within the Python interpreter. A successful exploit could allow an attacker to escape the Python sandbox and execute arbitrary commands on the underlying operating system with the privileges of the authenticated user. Note: An attacker must be authenticated with Python execution privileges to exploit these vulnerabilities. For more information regarding Python execution privileges, see product-specific documentation, such as the section of the Cisco Nexus 9000 Series NX-OS Programmability Guide.
Why
The product does not use or incorrectly uses a protection mechanism that provides sufficient defense against directed attacks against the product.
How
An attacker operating through local access may attempt exploitation with low privileges. If successful, the issue may execute code or commands in the affected security context.
02
Exploit reality and attack path
CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.
Observed exploitation No confirmed evidence
?
Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.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 None recorded
?
Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.
- Likely attack path
- local access → Protection Mechanism Failure → execute code or commands in the affected security context
- Attack surface
- Local
- Privileges required
- Low: a basic authenticated account is required
- User interaction
- None
- 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-693 ↗
CWE-693: Protection Mechanism Failure. The product does not use or incorrectly uses a protection mechanism that provides sufficient defense against directed attacks against the product.
- 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:L/UI:N/S:U/C:L/I:L/A:LCommon 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.PRLowPrivileges required: The attacker needs basic user-level privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CLowConfidentiality impact: A successful attack can cause a limited loss.ILowIntegrity impact: A successful attack can cause a limited loss.ALowAvailability impact: A successful attack can cause a limited loss.- Post-exploitation / living off the land
- After compromise, an attacker may use built-in shells, scripting engines, scheduled tasks and native network utilities for discovery, persistence or movement. This is a plausible LoTL path, not evidence that it has occurred for every attack.
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. - Fix not verified
- Affected
- Cisco NX-OS Software: 8.2(5), 7.3(6)N1(1a), 7.3(5)D1(1), 8.4(2), 7.3(6)N1(1), 6.2(2), 8.4(3), 9.2(3), 7.0(3)I5(2), 8.2(1), 6.0(2)A8(7a), 7.0(3)I4(5), 6.0(2)A6(1), 7.3(1)D1(1), 6.2(14a), 7.0(3)I4(6), 7.3(4)N1(1), 7.0(3)I4(3), 9.2(2v), 6.0(2)A6(5b), 7.3(0)D1(1), 6.2(17a), 7.0(3)I4(7), 6.0(2)U6(1a), 7.1(5)N1(1b), 7.0(3)I4(1), 7.0(3)I4(8), 7.0(3)I4(2), 7.1(4)N1(1c), 7.0(3)IM3(1), 6.0(2)U6(5a), 6.0(2)A8(11), 6.0(2)A6(4a), 6.2(9), 6.2(5), 7.3(4)D1(1), 6.2(20), 9.2(1), 9.2(2t), 9.2(3y), 7.0(3)I4(1t), 6.0(2)U6(5c), 6.0(2)A6(4), 7.0(3)I7(6z), 9.3(2), 7.3(1)DY(1), 7.0(3)F3(3), 6.0(2)U6(6), 6.2(29), 7.0(3)I7(3z), 7.0(3)IM7(2), 6.0(2)A8(11b), 6.2(9a), 7.3(0)N1(1), 7.0(3)I7(5a), 6.2(11d), 8.1(1), 7.0(3)I6(1), 6.0(2)U6(10), 7.2(2)D1(2), 7.0(3)IM3(2), 6.0(2)A6(8), 8.2(2), 6.0(2)U6(1), 7.3(2)N1(1c), 7.0(3)I5(3b), 8.3(2), 7.3(5)N1(1), 6.0(2)A6(2a), 7.3(2)N1(1b), 6.2(27), 7.3(2)D1(3a), 7.3(1)N1(1), 6.0(2)U6(7), 9.2(4), 7.1(4)N1(1a), 7.1(3)N1(4), 7.0(3)IM3(2a), 6.2(8b), 6.0(2)A8(10), 7.1(3)N1(2), 6.2(13), 6.0(2)A8(2), 7.0(3)IC4(4), 6.2(1), 7.3(4)N1(1a), 8.1(2), 6.0(2)A6(3), 6.0(2)U6(5b), 7.0(3)F3(3c), 7.3(3)D1(1), 7.0(3)F3(1), 6.0(2)U6(5), 7.0(3)F3(5), 7.1(2)N1(1), 7.1(3)N1(3), 8.2(3), 6.0(2)A6(7), 7.0(3)I7(2), 6.2(5a), 6.2(18), 6.0(2)A6(5), 7.0(3)IM3(2b), 7.1(3)N1(1), 6.0(2)U6(4a), 7.0(3)I5(3), 7.0(3)I7(3), 6.0(2)A8(6), 7.0(3)I6(2), 8.3(1), 6.2(3), 6.2(22), 7.1(1)N1(1), 8.4(1), 8.1(1b), 7.3(0)N1(1b), 7.2(2)D1(4), 6.0(2)A8(5), 7.3(0)DX(1), 7.1(4)N1(1d), 7.3(2)D1(1), 7.3(2)N1(1), 6.0(2)U6(8), 7.1(1)N1(1a), 7.0(3)IM3(3), 9.3(1), 6.0(2)U6(2), 6.2(9b), 7.1(3)N1(2a), 7.3(0)N1(1a), 6.0(2)A8(7), 7.0(3)I7(6), 7.3(2)D1(2), 6.2(25), 6.0(2)U6(3a), 8.0(1), 6.0(2)A8(11a), 6.2(11e), 7.1(3)N1(5), 7.0(3)I4(8z), 6.2(11), 7.0(3)I4(9), 6.2(16), 6.2(19), 8.2(4), 6.2(2a), 7.2(2)D1(3), 7.1(0)N1(1b), 7.0(3)I7(4), 7.0(3)I7(7), 6.2(5b), 7.3(0)DY(1), 6.0(2)A8(9), 6.0(2)A8(1), 7.1(5)N1(1), 7.2(1)D1(1), 6.2(15), 6.0(2)A6(6), 6.0(2)A8(10a), 7.0(3)I5(1), 9.3(1z), 9.2(2), 6.2(7), 6.2(9c), 7.0(3)F3(4), 7.3(3)N1(1), 6.2(6b), 7.0(3)I4(8b), 8.1(2a), 7.3(2)D1(3), 6.2(8), 6.0(2)A8(3), 6.2(11b), 7.0(3)I4(6t), 7.0(3)I5(3a), 8.1(1a), 6.2(13a), 6.0(2)A8(8), 7.0(3)I7(5), 7.0(3)F3(3a), 7.1(0)N1(1a), 6.0(2)A8(4), 6.0(2)A6(3a), 6.0(2)A6(5a), 7.0(3)F2(1), 7.0(3)I4(8a), 6.0(2)U6(9), 7.0(3)F3(2), 6.0(2)U6(2a), 6.2(12), 6.2(17), 7.0(3)I4(4), 6.2(23), 6.2(13b), 6.0(2)U6(3), 6.2(10), 6.2(6a), 6.2(6), 7.1(2)N1(1a), 6.2(14), 7.0(3)I7(1), 6.2(14b), 6.2(21), 7.2(2)D1(1), 7.0(3)F2(2), 7.0(3)IA7(2), 7.0(3)IA7(1), 6.0(2)A8(7b), 6.2(8a), 6.2(11c), 7.0(3)F1(1), 6.0(2)A6(1a), 7.1(0)N1(1), 7.2(0)D1(1), 6.0(2)A6(2), 7.1(4)N1(1), 6.0(2)A8(4a), 6.2(20a), 6.0(2)U6(4), 8.4(1a), 9.3(3), 7.3(2)D1(1d), 7.3(7)N1(1), 6.2(24), 6.2(31), 7.0(3)I7(8), 6.0(2)U6(10a), 7.3(7)N1(1a), 9.3(4), 7.3(6)D1(1), 6.2(26), 8.2(6), 6.2(33), 9.3(5), 8.4(2a), 8.4(2b), 7.3(8)N1(1), 7.0(3)I7(9), 7.3(7)N1(1b), 6.2(24a), 8.5(1), 9.3(6), 10.1(2), 10.1(1), 8.4(4), 7.3(7)D1(1), 8.4(2c), 9.3(5w), 8.2(7), 7.3(9)N1(1), 9.3(7), 9.3(7k), 7.0(3)I7(9w), 10.2(1), 7.3(8)N1(1a), 7.3(8)D1(1), 9.3(7a), 8.2(7a), 9.3(8), 8.4(4a), 8.4(2d), 7.3(10)N1(1), 8.4(5), 7.0(3)I7(10), 7.3(8)N1(1b), 8.2(8), 10.2(1q), 10.2(2), 9.3(9), 10.1(2t), 7.3(9)D1(1), 7.3(11)N1(1), 10.2(3), 8.4(6), 10.2(3t), 8.4(2e), 9.3(10), 7.3(11)N1(1a), 10.2(2a), 7.3(12)N1(1), 9.2(1a), 8.2(9), 10.3(1), 10.2(4), 7.3(13)N1(1), 8.4(7), 10.3(2), 8.4(6a), 9.3(11), 10.3(3), 10.2(5), 9.4(1), 9.3(2a), 8.4(2f), 8.2(10), 9.3(12), 10.2(3v), 10.4(1), 8.4(8), 10.3(99w), 7.3(14)N1(1), 10.2(6), 10.3(3w), 10.3(99x), 10.3(3o), 8.4(9), 10.3(4), 10.3(3p), 10.3(4a), 9.4(1a), 10.4(2), 10.3(3q), 9.3(13), 8.2(11), 10.3(5), 10.2(7), 10.4(3), 10.3(3x), 10.3(4g), 10.3(3r)
- Fixed
- No fixed version is explicitly recorded in the structured CVE data.
- Action
- No verified patch reference is present in the current structured sources. Check the vendor advisory before making a change.
- Workaround
- No verified workaround is recorded. Limit untrusted access and use least privilege until authoritative guidance is available.
04
Evidence and provenance
Published 28 Aug 2024 · Last source change 28 Aug 2024, 17:19 UTC · CWE-693 · Protection Mechanism Failure
CVE recordCVE.org · 5.1
CVSS sourceCNA
EPSS source FIRST · tracked since 2026-08-14
?
The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.European sourceENISA EUVD · EUVD-2024-17999
Product sourceCNA
Remediation sourceCVE/CNA references
CWE sourceCNA
NVD statusNVD enriched
Core structured fields are present and their contributing authorities are shown above.
Material change intelligence
View recent updates ↗What changed after publication
No material field changes have been recorded since change tracking began. Routine source refreshes and cosmetic edits are intentionally excluded.
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.