Not ratedCVE-2012-1938

    Mozilla Firefox: Memory Corruption (CVE-2012-1938)

    Published Sources: CVE.org

    What is affected, what to do

    Multiple unspecified vulnerabilities in the browser engine in Mozilla Firefox before 13.0, Thunderbird before 13.0, and SeaMonkey before 2.10 allow remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via vectors related to (1) methodjit/ImmutableSync.cpp, (2) the JSObject::makeDenseArraySlow function in js/src/jsarray.cpp, and unknown other components.

    An exploit is publicly available. Update Mozilla Firefox to version 13.0, Mozilla Seamonkey to version 2.10, Mozilla Thunderbird to version 13.0.

    Affected
    • Mozilla Firefox lt *..13.0
    • Mozilla Seamonkey lt *..2.10
    • Mozilla Thunderbird lt *..13.0
    • OpenSUSE eq 11.4..11.4
    • OpenSUSE eq 12.1..12.1
    • SUSE Linux Enterprise Desktop eq 10..10
    • SUSE Linux Enterprise Desktop eq 11..11
    • SUSE Linux Enterprise Server eq 10..10
    • SUSE Linux Enterprise Server eq 11..11
    • SUSE Linux Enterprise Software Development Kit (SDK) eq 10..10
    • SUSE Linux Enterprise Software Development Kit (SDK) eq 11..11
    • Red Hat Storage eq 2.0..2.0
    • Redhat Enterprise Linux Desktop eq 5.0..5.0
    • Redhat Enterprise Linux Desktop eq 6.0..6.0
    • Red Hat Enterprise Linux Extended Update Support (EUS) eq 6.2..6.2
    • Redhat Enterprise Linux Server eq 5.0..5.0
    • Redhat Enterprise Linux Server eq 6.0..6.0
    • Redhat Enterprise Linux Server Advanced mission critical Update Support (AUS) eq 6.2..6.2
    • Redhat Enterprise Linux Workstation eq 5.0..5.0
    • Redhat Enterprise Linux Workstation eq 6.0..6.0
    Fixed in
    • Mozilla Firefox 13.0
    • Mozilla Seamonkey 2.10
    • Mozilla Thunderbird 13.0

    Not sure whether and how you are affected? Ask a question about this vulnerability

    Metrics

    —

    Priority

    No value is available for this vulnerability.

    —

    CVSS v3

    No value is available for this vulnerability.

    4.8 %

    EPSS score

    Moderate — model estimates 1-10% exploitation likelihood.

    Source: FIRST EPSS, percentile 91.9

    Show all metrics
    Severity
    Not rated
    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
    67.59 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
    PoC (publicly reported)
    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
    4.8 %
    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
    91.9
    Critical — this CVE ranks in the top fifth of all CVEs scored today (rank ≥ 80%).
    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

    Multiple unspecified vulnerabilities in the browser engine in Mozilla Firefox before 13.0, Thunderbird before 13.0, and SeaMonkey before 2.10 allow remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via vectors related to (1) methodjit/ImmutableSync.cpp, (2) the JSObject::makeDenseArraySlow function in js/src/jsarray.cpp, and unknown other components.

    Source: NVD (NIST), cvelistv5

    Affected products

    The following versions are affected. Older releases of the same product line are also vulnerable unless stated otherwise.

    Affected products
    Affected versionsFixed in
    mozillafirefox
    • < 13.0
    • 13.0
    mozillaseamonkey
    • < 2.10
    • 2.10
    mozillathunderbird
    • < 13.0
    • 13.0
    redhatstorage
    • 2.0
    • —

    Vendors and products

    Affected operating systems

    Affected operating systems
    Linuxredhatenterprise_linux_desktop5.0
    Linuxredhatenterprise_linux_desktop6.0
    Linuxredhatenterprise_linux_eus6.2
    Linuxredhatenterprise_linux_server5.0
    Linuxredhatenterprise_linux_server6.0
    Linuxredhatenterprise_linux_server_aus6.2
    Linuxredhatenterprise_linux_workstation5.0
    Linuxredhatenterprise_linux_workstation6.0
    Linuxsuselinux_enterprise_desktop10
    Linuxsuselinux_enterprise_desktop11
    Linuxsuselinux_enterprise_server10
    Linuxsuselinux_enterprise_server11
    Linuxsuselinux_enterprise_software_development_kit10
    Linuxsuselinux_enterprise_software_development_kit11
    Linuxopensuseopensuse11.4
    Linuxopensuseopensuse12.1

    Public exploit references

    Publicly reported proof-of-concepts, exploit modules and detection templates for this vulnerability. NEOSEC links to the original sources only and does not provide any exploit code.

    Public exploit references
    Reference tagged as exploitbugzilla.mozilla.org (opens in a new tab)PoC (publicly reported)reported, not verified—
    Reference tagged as exploitbugzilla.mozilla.org (opens in a new tab)PoC (publicly reported)reported, not verified—
    Reference tagged as exploitbugzilla.mozilla.org (opens in a new tab)PoC (publicly reported)reported, not verified—

    References & sources

    • bugzilla.mozilla.orgshow_bug.cgi?id=748948x_refsource_CONFIRM, Issue tracking, Patch, Vendor advisory
    • bugzilla.mozilla.orgshow_bug.cgi?id=723773x_refsource_CONFIRM, Issue tracking, Patch, Vendor advisory
    • mandriva.comMDVSA-2012:088Vendor advisory, x_refsource_MANDRIVA, Third-party advisory
    • bugzilla.mozilla.orgshow_bug.cgi?id=716067x_refsource_CONFIRM, Issue tracking, Patch, Vendor advisory
    • bugzilla.mozilla.orgshow_bug.cgi?id=736012x_refsource_CONFIRM, Exploit, Issue tracking, Patch, Vendor advisory
    • rhn.redhat.comRHSA-2012:0710Vendor advisory, x_refsource_REDHAT, Third-party advisory
    • bugzilla.mozilla.orgshow_bug.cgi?id=670317x_refsource_CONFIRM, Exploit, Issue tracking, Patch, Vendor advisory
    • mozilla.orgsecurity/announce/2012/mfsa2012-34.htmlx_refsource_CONFIRM, Vendor advisory
    • oval.cisecurity.orgoval:org.mitre.oval:def:17058Vulnerability database, signature, x_refsource_OVAL, Third-party advisory
    • bugzilla.mozilla.orgshow_bug.cgi?id=718852x_refsource_CONFIRM, Issue tracking, Vendor advisory
    • bugzilla.mozilla.orgshow_bug.cgi?id=730415x_refsource_CONFIRM, Exploit, Issue tracking, Patch, Vendor advisory
    • lists.opensuse.orgSUSE-SU-2012:0746Vendor advisory, x_refsource_SUSE, Mailing list, Third-party advisory
    • lists.opensuse.orgopenSUSE-SU-2012:0760Vendor advisory, x_refsource_SUSE, Mailing list, Third-party advisory
    • securityfocus.com53796Vulnerability database, x_refsource_BID, Third-party advisory, Vulnerability database
    • rhn.redhat.comRHSA-2012:0715Vendor advisory, x_refsource_REDHAT, Third-party advisory
    • bugzilla.mozilla.orgshow_bug.cgi?id=723971x_refsource_CONFIRM, Issue tracking, Patch, Vendor advisory
    • bugzilla.mozilla.orgshow_bug.cgi?id=699594x_refsource_CONFIRM, Issue tracking, Patch, Vendor advisory
    • bugzilla.mozilla.orgshow_bug.cgi?id=708688x_refsource_CONFIRM, Issue tracking, Vendor advisory
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