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.

公開: 2012-11-23 最後更新: 2026-06-16 指派方: [email protected] 來源: [email protected]

結論預警: CVE-2012-3495 綜合評估為低風險(36.9/100):CVSS 技術影響為中級,利用機率偏低(EPSS 0.44%) 強制指令: 持續追蹤利用情報與 EPSS 變化,並適時複評優先級。

風險隨態勢動態變化;本站持續評估並同步更新本頁展示內容。

CVE-2012-3495 的 EPSS(利用預測評分)

EPSS 日更估計相對被利用可能性;百分位表示該 CVE 在已評分漏洞中的相對排名(越高表示相對更嚴重)。

# 日期 舊 EPSS 分數 新 EPSS 分數 變化(新 − 舊)
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 歷史 (共 3 筆)

CVE-2012-3495 的 CVSS 指標

該 CVE 的 CVSS 指標。

底座分 版本 嚴重度 向量 可利用性 影響 分數來源
6.1 2.0 MEDIUM
AV:L/AC:L/Au:N/C:P/I:P/A:C 點擊展開
存取路徑 (AV:L)
需本機登入或本機互動,僅遠端觸達不足以單獨完成利用。
存取複雜度 (AC:L)
步驟短、路徑清楚,重現成本低。
認證 (AU:N)
全程無需有效身分。
機密性影響 (C:P)
機密性受到部分損害。
完整性影響 (I:P)
完整性受到部分損害。
可用性影響 (A:C)
可用性被完全破壞。
3.9 8.5 [email protected]

CVE-2012-3495 的弱點列舉

CVE-2012-3495 的 OS 追蹤

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 的影響軟體 / 設定

廠商 產品 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 的參考連結

URL 標籤
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
cvelogic Threat Intelligence