CVE Feed

    Dashboard / CVE / CVE-2012-3495

    CVE-2012-3495

    The physdev_get_free_pirq hypercall in arch/x86/physdev.c in Xen 4.1.x and Citrix XenServer 6.0.2 and earlier uses the return value of the get_free_pirq function as an array index without checking that the return value indicates an error, which allows guest OS users to cause a denial of service (invalid memory write and host crash) and possibly gain privileges via unspecified vectors.

    Published:Sep 5, 2012
    Last Modified:Apr 11, 2025
    EPS:Nov 23, 2012
    EPSS Score:0.00081
    CVSS Score:6.1

    Affected Products

    Vendor
    Citrix
    Product
    Xenserver
    Vendor
    Xen
    Product
    Xen

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-20 Improper Input Validation

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-10 Buffer Overflow via Environment Variables
    CAPEC-101 Server Side Include (SSI) Injection
    CAPEC-104 Cross Zone Scripting
    CAPEC-108 Command Line Execution through SQL Injection
    CAPEC-109 Object Relational Mapping Injection
    CAPEC-110 SQL Injection through SOAP Parameter Tampering
    CAPEC-120 Double Encoding
    CAPEC-13 Subverting Environment Variable Values
    CAPEC-135 Format String Injection
    CAPEC-136 LDAP Injection
    CAPEC-14 Client-side Injection-induced Buffer Overflow
    CAPEC-153 Input Data Manipulation
    CAPEC-182 Flash Injection
    CAPEC-209 XSS Using MIME Type Mismatch
    CAPEC-22 Exploiting Trust in Client
    CAPEC-23 File Content Injection
    CAPEC-230 Serialized Data with Nested Payloads
    CAPEC-231 Oversized Serialized Data Payloads
    CAPEC-24 Filter Failure through Buffer Overflow
    CAPEC-250 XML Injection
    CAPEC-261 Fuzzing for garnering other adjacent user/sensitive data
    CAPEC-267 Leverage Alternate Encoding
    CAPEC-28 Fuzzing
    CAPEC-3 Using Leading 'Ghost' Character Sequences to Bypass Input Filters
    CAPEC-31 Accessing/Intercepting/Modifying HTTP Cookies
    CAPEC-42 MIME Conversion
    CAPEC-43 Exploiting Multiple Input Interpretation Layers
    CAPEC-45 Buffer Overflow via Symbolic Links
    CAPEC-46 Overflow Variables and Tags
    CAPEC-47 Buffer Overflow via Parameter Expansion
    CAPEC-473 Signature Spoof
    CAPEC-52 Embedding NULL Bytes
    CAPEC-53 Postfix, Null Terminate, and Backslash
    CAPEC-588 DOM-Based XSS
    CAPEC-63 Cross-Site Scripting (XSS)
    CAPEC-64 Using Slashes and URL Encoding Combined to Bypass Validation Logic
    CAPEC-664 Server Side Request Forgery
    CAPEC-67 String Format Overflow in syslog()
    CAPEC-7 Blind SQL Injection
    CAPEC-71 Using Unicode Encoding to Bypass Validation Logic
    CAPEC-72 URL Encoding
    CAPEC-73 User-Controlled Filename
    CAPEC-78 Using Escaped Slashes in Alternate Encoding
    CAPEC-79 Using Slashes in Alternate Encoding
    CAPEC-8 Buffer Overflow in an API Call
    CAPEC-80 Using UTF-8 Encoding to Bypass Validation Logic
    CAPEC-81 Web Server Logs Tampering
    CAPEC-83 XPath Injection
    CAPEC-85 AJAX Footprinting
    CAPEC-88 OS Command Injection
    CAPEC-9 Buffer Overflow in Local Command-Line Utilities

    Related CVEs

    CVE-2024-5661 (CVSS 6) — An issue has been identified in both XenServer 8 and Citrix Hypervisor 8.2 CU1 LTSR which may allow a maliciou…
    CVE-2012-4606 (CVSS 7.8) — Citrix XenServer 4.1, 6.0, 5.6 SP2, 5.6 Feature Pack 1, 5.6 Common Criteria, 5.6, 5.5, 5.0, and 5.0 Update 3 c…
    CVE-2014-3798 (CVSS 6.5) — The Windows Guest Tools in Citrix XenServer 6.2 SP1 and earlier allows remote attackers to cause a denial of s…
    CVE-2018-19962 (CVSS 7.8) — An issue was discovered in Xen through 4.11.x on AMD x86 platforms, possibly allowing guest OS users to gain h…
    CVE-2018-19961 (CVSS 7.8) — An issue was discovered in Xen through 4.11.x on AMD x86 platforms, possibly allowing guest OS users to gain h…
    CVE-2018-19965 (CVSS 5.6) — An issue was discovered in Xen through 4.11.x allowing 64-bit PV guest OS users to cause a denial of service (…
    CVE-2018-14007 (CVSS 9.8) — Citrix XenServer 7.1 and newer allows Directory Traversal.…
    CVE-2018-11053 (CVSS 6.5) — Dell EMC iDRAC Service Module for all supported Linux and XenServer versions v3.0.1, v3.0.2, v3.1.0, v3.2.0, w…
    CVE-2018-3665 (CVSS 5.6) — System software utilizing Lazy FP state restore technique on systems using Intel Core-based microprocessors ma…
    CVE-2018-8897 (CVSS 7.8) — A statement in the System Programming Guide of the Intel 64 and IA-32 Architectures Software Developer's Manua…

    References

    http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00003.html
    http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00004.html
    http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00017.html
    http://lists.opensuse.org/opensuse-security-announce/2012-11/msg00017.html
    http://lists.opensuse.org/opensuse-security-announce/2012-11/msg00018.html
    http://lists.xen.org/archives/html/xen-announce/2012-09/msg00001.html
    http://secunia.com/advisories/51413
    http://secunia.com/advisories/55082
    http://security.gentoo.org/glsa/glsa-201309-24.xml
    http://support.citrix.com/article/CTX134708
    http://wiki.xen.org/wiki/Security_Announcements#XSA-13_hypercall_physdev_get_free_pirq_vulnerability
    http://www.openwall.com/lists/oss-security/2012/09/05/6
    http://www.securityfocus.com/bid/55406
    http://www.securitytracker.com/id?1027480
    http://xenbits.xen.org/hg/xen-4.1-testing.hg/rev/6779ddca8593
    https://security.gentoo.org/glsa/201604-03
    http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00003.html
    http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00004.html
    http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00017.html
    http://lists.opensuse.org/opensuse-security-announce/2012-11/msg00017.html
    http://lists.opensuse.org/opensuse-security-announce/2012-11/msg00018.html
    http://lists.xen.org/archives/html/xen-announce/2012-09/msg00001.html
    http://secunia.com/advisories/51413
    http://secunia.com/advisories/55082
    http://security.gentoo.org/glsa/glsa-201309-24.xml
    http://support.citrix.com/article/CTX134708
    http://wiki.xen.org/wiki/Security_Announcements#XSA-13_hypercall_physdev_get_free_pirq_vulnerability
    http://www.openwall.com/lists/oss-security/2012/09/05/6
    http://www.securityfocus.com/bid/55406
    http://www.securitytracker.com/id?1027480
    http://xenbits.xen.org/hg/xen-4.1-testing.hg/rev/6779ddca8593
    https://security.gentoo.org/glsa/201604-03

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High