MediumCVE-2015-8677

    Huawei S2350EI Firmware: Memory Leak (CVE-2015-8677)

    Published Sources: CVE.org

    What is affected, what to do

    Memory leak in Huawei S5300EI, S5300SI, S5310HI, and S6300EI Campus series switches with software V200R003C00 before V200R003SPH011 and V200R005C00 before V200R005SPH008; S2350EI and S5300LI Campus series switches with software V200R003C00 before V200R003SPH011, V200R005C00 before V200R005SPH008, and V200R006C00 before V200R006SPH002; S9300, S7700, and S9700 Campus series switches with software V200R003C00 before V200R003SPH011, V200R005C00 before V200R005SPH009, and V200R006C00 before V200R006SPH003; S5720HI and S5720EI Campus series switches with software V200R006C00 before V200R006SPH002; and S2300 and S3300 Campus series switches with software V100R006C05 before V100R006SPH022 allows remote authenticated users to cause a denial of service (memory consumption and device restart) by logging in and out of the (1) HTTPS or (2) SFTP server, related to SSL session information.

    Update Huawei S5300EI Firmware to version v200r003sph011, Huawei S5300EI Firmware to version v200r005sph008, Huawei S5300SI Firmware to version v200r001sph018.

    Affected
    • Huawei S5300EI Firmware lt v200r003c00..v200r003sph011
    • Huawei S5300EI Firmware lt v200r005c00..v200r005sph008
    • Huawei S5300SI Firmware lt v200r001c00..v200r001sph018
    • Huawei S5300SI Firmware lt v200r002c00..v200r003sph011
    • Huawei S5310HI Firmware lt v200r001c00..v200r001sph018
    • Huawei S5310HI Firmware lt v200r002c00..v200r003sph011
    • Huawei S6300EI Firmware lt v200r001c00..v200r001sph018
    • Huawei S6300EI Firmware lt v200r002c00..v200r003sph011
    • Huawei S5300LI Firmware lt v200r003c00..v200r003sph011
    • Huawei S5300LI Firmware lt v200r005c00..v200r005sph008
    • Huawei S5300LI Firmware lt v200r006c00..v200r006sph002
    • Huawei S2350EI Firmware lt v200r003c00..v200r003sph011
    • Huawei S2350EI Firmware lt v200r005c00..v200r005sph008
    • Huawei S2350EI Firmware lt v200r006c00..v200r006sph002
    • Huawei S9300 Firmware lt v200r003c00..v200r003sph011
    • Huawei S9300 Firmware lt v200r005c00..v200r005sph009
    • Huawei S9300 Firmware lt v200r006c00..v200r006sph003
    • Huawei S9700 Firmware lt v200r003c00..v200r003sph011
    • Huawei S9700 Firmware lt v200r005c00..v200r005sph009
    • Huawei S9700 Firmware lt v200r006c00..v200r006sph003
    • Huawei S7700 Firmware lt v200r003c00..v200r003sph011
    • Huawei S7700 Firmware lt v200r005c00..v200r005sph009
    • Huawei S7700 Firmware lt v200r006c00..v200r006sph003
    • Huawei S5720HI Firmware lt v200r006c00..v200r006sph002
    • Huawei S5720EI Firmware lt v200r006c00..v200r006sph002
    • Huawei S2300 Firmware lt v100r006c05..v100r006sph022
    • Huawei S3300 Firmware lt v100r006c05..v100r006sph022
    Fixed in
    • Huawei S5300EI Firmware v200r003sph011
    • Huawei S5300EI Firmware v200r005sph008
    • Huawei S5300SI Firmware v200r001sph018
    • Huawei S5300SI Firmware v200r003sph011
    • Huawei S5310HI Firmware v200r001sph018
    • Huawei S5310HI Firmware v200r003sph011
    • Huawei S6300EI Firmware v200r001sph018
    • Huawei S6300EI Firmware v200r003sph011
    • Huawei S5300LI Firmware v200r003sph011
    • Huawei S5300LI Firmware v200r005sph008
    • Huawei S5300LI Firmware v200r006sph002
    • Huawei S2350EI Firmware v200r003sph011
    • Huawei S2350EI Firmware v200r005sph008
    • Huawei S2350EI Firmware v200r006sph002
    • Huawei S9300 Firmware v200r003sph011
    • Huawei S9300 Firmware v200r005sph009
    • Huawei S9300 Firmware v200r006sph003
    • Huawei S9700 Firmware v200r003sph011
    • Huawei S9700 Firmware v200r005sph009
    • Huawei S9700 Firmware v200r006sph003
    • Huawei S7700 Firmware v200r003sph011
    • Huawei S7700 Firmware v200r005sph009
    • Huawei S7700 Firmware v200r006sph003
    • Huawei S5720HI Firmware v200r006sph002
    • Huawei S5720EI Firmware v200r006sph002
    • Huawei S2300 Firmware v100r006sph022
    • Huawei S3300 Firmware v100r006sph022

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    Metrics

    6.5

    Priority

    XIEM Effective CVSS: highest available CVSS rating from NVD and vendor data.

    Source: NVD, CVSS v3

    6.5

    CVSS v3

    Severity Medium on the scale from 0 to 10.

    Source: CVE.org

    1.1 %

    EPSS score

    Moderate — model estimates 1-10% exploitation likelihood.

    Source: FIRST EPSS, percentile 66.0

    Show all metrics
    Severity
    Medium
    Priority (0–325)

    The priority score is a consolidated metric that condenses several individual signals into a single, action-guiding ranking: technical severity (CVSS), exploitation likelihood (EPSS), known-exploited status (KEV) and the context of the affected asset. The aim is to answer the only truly important question in vulnerability management: what first?

    Read in glossary
    67.31 Methodology
    Exploit maturity

    An exploit is code or a technique that specifically uses a concrete vulnerability to force unintended behaviour — such as executing code or escalating privileges. It is the tool that turns a theoretical flaw into a practical attack.

    Read in glossary
    no public PoC known
    XIEM Effective CVSS

    XIEM® is the tiered managed-security operating model from NEOSEC and a registered trademark of NEOSEC GmbH. It extends classic SIEM — the central collection, normalisation and correlation of security-relevant events — with endpoint forensics, network visibility and deception technology, and consolidates them into three building tiers: Sentry, Orchestrate and Command.

    Read in glossary
    6.5 Methodology
    CVSS v3

    CVSS is the globally established, open standard for assessing the technical severity of a vulnerability on a scale from 0 to 10. It describes how easily a flaw can be exploited and what damage it can cause — but not how likely its actual exploitation is. CVSS and the complementary EPSS deliberately answer different questions.

    Read in glossary
    6.5
    EPSS score

    The EPSS score is the absolute model output for an individual vulnerability: the estimated probability of real-world exploitation within the next 30 days, expressed as a value between 0 and 1 (i.e. 0 % to 100 %). A score of 0.42 means „the model estimates a 42 % chance of real-world exploitation within 30 days“.

    Read in glossary
    1.1 %
    Moderate — model estimates 1-10% exploitation likelihood.
    EPSS percentile

    The EPSS percentile is the relative position of a vulnerability within all EPSS-scored CVEs, expressed as a value between 0 and 1. A percentile of 0.90 means „this CVE has a higher EPSS score than 90 % of all other scored CVEs“. Unlike the EPSS score, it is not a probability — but a positioning within a ranking.

    Read in glossary
    66.0
    High — this CVE ranks above the median of all CVEs scored today (rank ≥ 36%).
    KEV status

    The KEV catalogue is a list maintained by the US authority CISA of vulnerabilities for which active exploitation in the wild has been confirmed. It answers not the question „how severe?“ but „is it already being attacked?“ — thereby sharply prioritising patching.

    Read in glossary
    —
    Published

    Detection rules

    No NEOSEC detection rule is available for this vulnerability yet.

    Classification under NIS2 and CRA

    Rule-based classification from exploitation status and severity. It does not replace a case-by-case assessment.

    NIS2

    NIS2 is EU Directive (EU) 2022/2555 to raise the level of cybersecurity across the Union. It substantially broadens obligations compared with the first NIS directive: more sectors, mandatory risk management, staged reporting duties and personal accountability of senior management.

    Read in glossary
    Handle the vulnerability in regular vulnerability handling under Art. 21(2)(e) NIS2.
    CRA

    The CRA is EU Regulation (EU) 2024/2847 setting horizontal cybersecurity requirements for „products with digital elements“ — from industrial controllers and software to connected consumer devices. For the first time manufacturers must ensure security across the entire product lifecycle, handle vulnerabilities and provide security updates.

    Read in glossary
    From 11.12.2027, Annex I Part II CRA requires manufacturers of affected products with digital elements to handle vulnerabilities without delay and provide security updates.
    ISO/IEC 27001

    ISO/IEC 27001 is the internationally leading standard for an information security management system (ISMS). It describes a risk-based, process-oriented framework to systematically plan, implement, review and improve information security.

    Read in glossary
    Control A.8.8, management of technical vulnerabilities: assess relevance to your systems, plan remediation and keep evidence.

    Description

    Memory leak in Huawei S5300EI, S5300SI, S5310HI, and S6300EI Campus series switches with software V200R003C00 before V200R003SPH011 and V200R005C00 before V200R005SPH008; S2350EI and S5300LI Campus series switches with software V200R003C00 before V200R003SPH011, V200R005C00 before V200R005SPH008, and V200R006C00 before V200R006SPH002; S9300, S7700, and S9700 Campus series switches with software V200R003C00 before V200R003SPH011, V200R005C00 before V200R005SPH009, and V200R006C00 before V200R006SPH003; S5720HI and S5720EI Campus series switches with software V200R006C00 before V200R006SPH002; and S2300 and S3300 Campus series switches with software V100R006C05 before V100R006SPH022 allows remote authenticated users to cause a denial of service (memory consumption and device restart) by logging in and out of the (1) HTTPS or (2) SFTP server, related to SSL session information.

    Source: NVD (NIST), cvelistv5

    Vendors and products

    Affected operating systems

    Affected operating systems
    Otherhuaweis2300_firmware—
    Otherhuaweis2350ei_firmware—
    Otherhuaweis3300_firmware—
    Otherhuaweis5300ei_firmware—
    Otherhuaweis5300li_firmware—
    Otherhuaweis5300si_firmware—
    Otherhuaweis5310hi_firmware—
    Otherhuaweis5720ei_firmware—
    Otherhuaweis5720hi_firmware—
    Otherhuaweis6300ei_firmware—
    Otherhuaweis7700_firmware—
    Otherhuaweis9300_firmware—
    Otherhuaweis9700_firmware—

    References & sources

    • huawei.comen/psirt/security-advisories/huawei-sa-20160113-03-switch-enx_refsource_CONFIRM, Vendor advisory
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