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Full vulnerability report · 2017
CVE-2017-9793High confidence

Apache Software Foundation Apache Struts: Improper Input Validation

Apache Software Foundation · Apache Struts

7.5HighCVSS 3.0
Recommended action
Within 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Patch available
Optional official sources

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

Select the national-authority views to include. The exact source language is shown on each matched advisory. Your choice is remembered on this device and encoded in the shareable URL.

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-2018-0702

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

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Patch available
01

What, why and how

The REST Plugin in Apache Struts 2.1.x, 2.3.7 through 2.3.33 and 2.5 through 2.5.12 is using an outdated XStream library which is vulnerable and allow perform a DoS attack using malicious request with specially crafted XML payload.

What

The REST Plugin in Apache Struts 2.1.x, 2.3.7 through 2.3.33 and 2.5 through 2.5.12 is using an outdated XStream library which is vulnerable and allow perform a DoS attack using malicious request with specially crafted XML payload.

Why

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

How

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

What

The REST Plugin in Apache Struts 2.1.x, 2.3.7 through 2.3.33 and 2.5 through 2.5.12 is using an outdated XStream library which is vulnerable and allow perform a DoS attack using malicious request with specially crafted XML payload.

Why

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

How

An attacker operating through a network path may attempt exploitation without authentication or 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.
None recorded

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
a network path → Improper Input Validation → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Network
Privileges required
None: unauthenticated exploitation is possible
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-20 ↗

CWE-20: Improper Input Validation. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Common Vulnerability Scoring System 3.0: the compact vector below is decoded into plain language.

AVNetworkAttack vector: The vulnerable component can be reached over a network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.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
No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
NetworkUnauthenticatedCWE-20
A

Official authority intelligence

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

Canadian Centre for Cyber Security · English · AV17-162Cisco security updates

ultiple Cisco Products: September 2017 Cisco NX-OS Software TCP Netstack Denial of Service Vulnerability Cisco Spark Hybrid Calendar Service Information Disclosure Vulnerability Cisco AMP for Endpoints Static Key Vulnerability Cisco Nexus Series Switches CLI Command Injection Vulnerability CVE References:   CVE-2017-3883, CVE-2017-12275,   CVE-2017-12278, CVE-2017-12261,  CVE-2017-12277, CVE-2017-12276, CVE-2017-12262, CVE-2017-12274, CVE-2017-12273, CVE-2017-12282, CVE-2017-12280, CVE-2017-12295, CVE-2017-12294, CVE-2017-12279, CVE-2017-12243,  CVE-2017-12283, CVE-2017-12281,  CVE-2017-12287, CVE-2017-6616,  CVE-2017-13077, CVE-2017-13078,  CVE-2017-9793, CVE-2017-9804, CVE-2017-12611, CVE-2015-0718,  CVE-2017-12310,  CVE-2017-12317, CVE-2017-6649. Suggested Action CCIRC recommends that system administrators test and deploy the vendor-released updates to affected applications accordingly. References: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171018-aaavty https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171101-wlc2 https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171101-wlc1 https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171101-ise https://tools.cisco.com/s

Official advisory ↗
Canadian Centre for Cyber Security · English · AV17-149Cisco security updates

rea Application Services ICA Cisco Wide Area Application Services Cisco Unified Communications Manager Cisco Spark Messaging Stored Cisco IOS XR Software Cisco Meeting Server Cisco Meeting App Cisco AnyConnect Network Access Manager Cisco Integrated Management Controller Cisco Integrated Management Controller Cisco IOS Software for Cisco Industrial Ethernet Switches PROFINET CVE References:  CVE-2017-12268, CVE-2017-12266, CVE-2017-12264, CVE-2017-12270, CVE-2017-12269, CVE-2017-12258, CVE-2017-12256, CVE-2017-12267, CVE-2017-12257, CVE-2017-12265, CVE-2016-9212, CVE-2017-12246, CVE-2017-12263,  CVE-2017-12244, CVE-2017-12245, CVE-2017-6616, CVE-2017-9793, CVE-2017-9804, CVE-2017-12611, CVE-2017-6619, CVE-2017-12235 Suggested Action CCIRC recommends that system administrators test and deploy the vendor-released updates to affected applications accordingly. References: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171004-ftd https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171004-fpsnort https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171004-clm https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171004-asa https://tools.cisco.com/security/center/content/CiscoSecurit

Official advisory ↗
Canadian Centre for Cyber Security · English · AV17-133Apache Struts security update

Apache has released Struts 2.3.34 and 2.5.13 which contains security fixes to address critical vulnerabilities and other vulnerabilities in their software. Versions affected: Apache Struts 2.3.x, versions 2.1.2 to 2.3.33 Apache Struts 2.5.x, versions 2.5 to 2.5.12 CVE References: CVE-2017-9793, CVE-2017-9804, CVE-2017-9805

Official advisory ↗
CERT-FR · French · CERTFR-2019-AVI-403Multiples vulnérabilités dans Apache Struts

De multiples vulnérabilités ont été découvertes dans Apache Struts. Certaines d'entre elles permettent à un attaquant de provoquer une exécution de code arbitraire à distance, un déni de service à distance et un contournement de la politique de sécurité.

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2017-008061Apache Struts 2 の REST プラグインにおけるサービス運用妨害 (DoS) の脆弱性

Apache Struts 2 の REST プラグインは、脆弱な旧式の XStream ライブラリを使用するため、サービス運用妨害 (DoS) 状態にされる脆弱性が存在します。

Official advisory ↗
KISA KrCERT/CC · Korean · KNVD-4809Cisco 제품군 취약점 보안 업데이트 권고

#### Cisco 제품군 취약점 보안 업데이트 권고 2017.09.08 2017-09-14 : 취약점 추가 ##### □ 개요 o Cisco社는 자사의 제품에 영향을 주는 취약점을 해결한 보안 업데이트를 발표 o 공격자는 해당 취약점을 악용하여 원격 코드 실행 및 서비스 거부 등의 피해를 발생시킬 수 있으므로, 최신 버전으로 업데이트 권고 ##### □ 내용 o Apache Struts REST 플러그인에서 XML 페이로드를 처리할 때 발생하는 원격 코드 실행 취약점(CVE-2017-9805) [1] o Apache Struts REST 플러그인에서 입력 값 검증 미흡으로 발생하는 서비스 거부 취약점(CVE-2017-9793) [1] o Apache Struts URLValidator 기능 사용 시 URL 유효성 검증 미흡으로 발생하는 서비스 거부 취약점(CVE-2017-9804) [1] o Cisco IOS 및 Cisco IOS XE 소프트웨어 UDP 패킷 처리 시 발생하는 서비스 거부 취약점(CVE-2017-6627) [2] o Cisco IoT-FND(IoT Field Network Director) 메모리 고갈로 발생하는 서비스 거부 취약점(CVE-2017-6780) [3] o Cisco Unified Communications Manager에서 부적절한 TLS 트래픽 처리로 발생하는 서비스 거부 취약점(CVE-2017-6791) [4] o Cisco Yes 셋톱 박스에서 발생하는 서비스 거부 취약점(CVE-2017-6631) [5] o Cisco SocialMiner에서 XML External Entities의 부적적할 처리로 시스템 정보를 읽고 쓸 수 있는 취약점(CVE-2017-12216) [6] o Cisco IOS 및 Cisco IOS XE 소프트웨어의 IPv6 SNMP에서 메시지 처리 시 발생하는 서비스 거부 취약점(CVE-2017-12211) [7] o Cisco Prime LAN 관리 솔루션에서 발생하는 세션 고정 취약점(CVE-2017-122

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
Apache Struts: 2.3.7 - 2.3.33, 2.5 - 2.5.12, 2.1.x series
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.
Action
Review the linked authoritative reference and apply the recorded fixed release appropriate to the affected product branch.
Workaround
No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
04

Evidence and provenance

Published 20 Sept 2017 · Last source change 16 Sept 2024, 20:12 UTC · CWE-20 · Improper Input Validation

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 2026-09-01
European sourceENISA EUVD · EUVD-2018-0702
Product sourceCNA
Remediation sourceCVE/CNA references
CWE sourceNIST NVD
NVD statusNVD modified after enrichment

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates ↗
  1. Vendor guidanceAuthoritative vendor guidance changed from vendor advisory to authoritative remediation link · patch.
    Before
    vendor advisory
    After
    authoritative remediation link · patch
    af854a3a-2127-422b-91ae-364da2661108 ↗
  2. Affected versionsThe structured affected or fixed version information changed.
    Before
    2.3.7 - 2.3.33; 2.5 - 2.5.12; 2.1.x series · Fixed: No fixed version is explicitly recorded in the structured CVE data.
    After
    2.3.7 - 2.3.33; 2.5 - 2.5.12; 2.1.x series · 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.
    CNA ↗
  3. Remediation statusRemediation status changed from Awaiting fix to Patch available.
    Before
    Awaiting fix
    After
    Patch available
    af854a3a-2127-422b-91ae-364da2661108 ↗
  4. SeveritySeverity changed from Unknown to High.
    Before
    Unknown
    After
    High
    NIST NVD ↗
  5. CVSS scoreCVSS score changed from not recorded to 7.5 (CVSS 3.0 · NIST NVD · CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).
    Before
    not recorded
    After
    7.5 (CVSS 3.0 · NIST NVD · CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
    NIST NVD ↗
  6. ENISA EUVD mappingEUVD-2018-0702 was added to the official ENISA EUVD mapping for this CVE.
    Before
    not recorded
    After
    {"euvdId":"EUVD-2018-0702"}
    ENISA EUVD ↗
  7. Catalogue recordCVE added to the BlackTree catalogue.
    CNA ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Fixed release or patch reference recorded
ENISA EUVD · EUVD-2018-0702↗CVE authority or vendor reference↗Patch or update 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-2017-9793 · cve.blacktree.nl