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.

公开: 2012-11-23 最后更新: 2026-06-16 分配方: [email protected] 来源: [email protected]

结论预警: CVE-2012-3495 综合评估为低风险(36.9/100):CVSS 技术影响为中级,利用概率偏低(EPSS 0.44%) 强制指令: 持续跟踪利用情报与 EPSS 变化,并适时复评优先级。

风险随态势动态变化;本站持续评估并同步更新本页展示内容。

CVE-2012-3495 的 EPSS(利用预测评分)

EPSS 日更估计相对被利用可能性;百分位表示该 CVE 在已评分漏洞中的相对排名(越高表示相对更严重)。

# 日期 旧 EPSS 分数 新 EPSS 分数 变化(新 − 旧)
1 2026-06-15 0.06% 0.44% +0.38%
2 2023-03-07 1.55% 0.06% -1.48%
3 2022-02-04 1.55%

完整 EPSS 历史 (共 3 条)

CVE-2012-3495 的 CVSS 指标

该 CVE 的 CVSS 指标。

底座分 版本 严重度 向量 可利用性 影响 分数来源
6.1 2.0 MEDIUM
AV:L/AC:L/Au:N/C:P/I:P/A:C 点击展开
访问路径 (AV:L)
需本地登录或本机交互,远程触达不足以单独完成利用。
访问复杂度 (AC:L)
步骤短、路径清晰,复现成本低。
认证 (AU:N)
全程无需有效身份。
机密性影响 (C:P)
机密性受到部分损害。
完整性影响 (I:P)
完整性受到部分损害。
可用性影响 (A:C)
可用性被完全破坏。
3.9 8.5 [email protected]

CVE-2012-3495 的弱点枚举

CVE-2012-3495 的 OS 跟踪

vendor priority summary link
debian not yet assigned CVE-2012-3495 not yet assigned priority: Debian including 1 source packages (xen), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2012-3495
gentoo normal CVE-2012-3495: 2 GLSA(s) (201309-24, 201604-03), 4 atom(s) (app-emulation/pvgrub, app-emulation/xen, app-emulation/xen-pvgrub, app-emulation/xen-tools); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2012-3495
redhat medium https://access.redhat.com/security/cve/CVE-2012-3495
ubuntu medium CVE-2012-3495 medium priority: Ubuntu including 4 source packages (xen, xen-3.1, xen-3.2, xen-3.3), 28 status rows across 7 suites (hardy, lucid, natty, oneiric, precise, quantal, upstream): DNE 17, not-affected 5, needs-triage 3, released 3. https://ubuntu.com/security/CVE-2012-3495

CVE-2012-3495 的影响软件 / 配置

厂商 产品 版本 原始 CPE
citrix xenserver <= 6.0.2 cpe:2.3:a:citrix:xenserver:*:*:*:*:*:*:*:*
citrix xenserver 5.0 cpe:2.3:a:citrix:xenserver:5.0:*:*:*:*:*:*:*
citrix xenserver 5.5 cpe:2.3:a:citrix:xenserver:5.5:*:*:*:*:*:*:*
citrix xenserver 5.6 cpe:2.3:a:citrix:xenserver:5.6:*:*:*:*:*:*:*
citrix xenserver 5.6 cpe:2.3:a:citrix:xenserver:5.6:fp1:*:*:*:*:*:*
citrix xenserver 5.6 cpe:2.3:a:citrix:xenserver:5.6:sp2:*:*:*:*:*:*
citrix xenserver 6.0 cpe:2.3:a:citrix:xenserver:6.0:*:*:*:*:*:*:*
xen xen 4.1.0 cpe:2.3:o:xen:xen:4.1.0:*:*:*:*:*:*:*
xen xen 4.1.1 cpe:2.3:o:xen:xen:4.1.1:*:*:*:*:*:*:*
xen xen 4.1.2 cpe:2.3:o:xen:xen:4.1.2:*:*:*:*:*:*:*
xen xen 4.1.3 cpe:2.3:o:xen:xen:4.1.3:*:*:*:*:*:*:*

CVE-2012-3495 的参考链接

URL 标签
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
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