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CVE-2023-34323— xenstored: A transaction conflict can crash C Xenstored

Quick assessment

Affected
Xen Xen
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Xen是英国剑桥（Cambridge）大学的一款开源的虚拟机监视器产品。该产品能够使不同和不兼容的操作系统运行在同一台计算机上，并支持在运行时进行迁移，保证正常运行并且避免宕机。 Xen 存在安全漏洞，该漏洞源于事务冲突会使C xenstored崩溃。

AI Predicted 5.3 Difficulty: Moderate EPSS 0.26% · P16

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2023-34323

Vulnerability Information
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Vulnerability Title
xenstored: A transaction conflict can crash C Xenstored
Source: CVE Program / CVE List V5
Vulnerability Description
When a transaction is committed, C Xenstored will first check the quota is correct before attempting to commit any nodes. It would be possible that accounting is temporarily negative if a node has been removed outside of the transaction. Unfortunately, some versions of C Xenstored are assuming that the quota cannot be negative and are using assert() to confirm it. This will lead to C Xenstored crash when tools are built without -DNDEBUG (this is the default).
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Xen 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Xen是英国剑桥（Cambridge）大学的一款开源的虚拟机监视器产品。该产品能够使不同和不兼容的操作系统运行在同一台计算机上，并支持在运行时进行迁移，保证正常运行并且避免宕机。 Xen 存在安全漏洞，该漏洞源于事务冲突会使C xenstored崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Xen Xen consult Xen advisory XSA-440 -

II. Public POCs for CVE-2023-34323

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III. Intelligence Information for CVE-2023-34323

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Other References for CVE-2023-34323 (1)

Same Patch Batch · Xen · 2024-01-05 · 10 CVEs total

CVE-2023-46837 arm32: The cache may not be properly cleaned/invalidated (take two)
CVE-2023-46836 x86: BTC/SRSO fixes not fully effective
CVE-2023-46835 x86/AMD: mismatch in IOMMU quarantine page table levels
CVE-2023-34327 x86/AMD: Debug Mask handling
CVE-2023-34328 x86/AMD: Debug Mask handling
CVE-2023-34325 Multiple vulnerabilities in libfsimage disk handling
CVE-2023-34326 x86/AMD: missing IOMMU TLB flushing
CVE-2023-34322 top-level shadow reference dropped too early for 64-bit PV guests
CVE-2023-34321 arm32: The cache may not be properly cleaned/invalidated

IV. Related Vulnerabilities

Same product: Xen
Same vendor: Xen

V. Comments for CVE-2023-34323

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