Out-of-bounds Read Affecting virt:rhel/libguestfs-appliance package, versions <1:1.44.0-5.module+el8.6.0+14480+c0a3aa0f


Severity

Recommended
0.0
medium
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.01% (2nd percentile)

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  • Snyk IDSNYK-RHEL8-VIRT-11338110
  • published30 Jul 2025
  • disclosed10 Jun 2025

Introduced: 10 Jun 2025

CVE-2025-49133  (opens in a new tab)
CWE-125  (opens in a new tab)

How to fix?

Upgrade RHEL:8 virt:rhel/libguestfs-appliance to version 1:1.44.0-5.module+el8.6.0+14480+c0a3aa0f or higher.
This issue was patched in RHSA-2025:12234.

NVD Description

Note: Versions mentioned in the description apply only to the upstream virt:rhel/libguestfs-appliance package and not the virt:rhel/libguestfs-appliance package as distributed by RHEL. See How to fix? for RHEL:8 relevant fixed versions and status.

Libtpms is a library that targets the integration of TPM functionality into hypervisors, primarily into Qemu. Libtpms, which is derived from the TPM 2.0 reference implementation code published by the Trusted Computing Group, is prone to a potential out of bounds (OOB) read vulnerability. The vulnerability occurs in the ‘CryptHmacSign’ function with an inconsistent pairing of the signKey and signScheme parameters, where the signKey is ALG_KEYEDHASH key and inScheme is an ECC or RSA scheme. The reported vulnerability is in the ‘CryptHmacSign’ function, which is defined in the "Part 4: Supporting Routines – Code" document, section "7.151 - /tpm/src/crypt/CryptUtil.c ". This vulnerability can be triggered from user-mode applications by sending malicious commands to a TPM 2.0/vTPM (swtpm) whose firmware is based on an affected TCG reference implementation. The effect on libtpms is that it will cause an abort due to the detection of the out-of-bounds access, thus for example making a vTPM (swtpm) unavailable to a VM. This vulnerability is fixed in 0.7.12, 0.8.10, 0.9.7, and 0.10.1.

CVSS Base Scores

version 3.1