CVSS: 6.4EPSS: 0%CPEs: 1EXPL: 1CVE-2023-22745 – Buffer Overlow in TSS2_RC_Decode in tpm2-tss
https://notcve.org/view.php?id=CVE-2023-22745
tpm2-tss is an open source software implementation of the Trusted Computing Group (TCG) Trusted Platform Module (TPM) 2 Software Stack (TSS2). In affected versions `Tss2_RC_SetHandler` and `Tss2_RC_Decode` both index into `layer_handler` with an 8 bit layer number, but the array only has `TPM2_ERROR_TSS2_RC_LAYER_COUNT` entries, so trying to add a handler for higher-numbered layers or decode a response code with such a layer number reads/writes past the end of the buffer. This Buffer overrun, could result in arbitrary code execution. An example attack would be a MiTM bus attack that returns 0xFFFFFFFF for the RC. Given the common use case of TPM modules an attacker must have local access to the target machine with local system privileges which allows access to the TPM system. • https://github.com/tpm2-software/tpm2-tss/commit/306490c8d848c367faa2d9df81f5e69dab46ffb5 https://github.com/tpm2-software/tpm2-tss/security/advisories/GHSA-4j3v-fh23-vx67 https://access.redhat.com/security/cve/CVE-2023-22745 https://bugzilla.redhat.com/show_bug.cgi?id=2162610 • CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') •
CVSS: 6.7EPSS: 0%CPEs: 3EXPL: 0CVE-2020-24455
https://notcve.org/view.php?id=CVE-2020-24455
Missing initialization of a variable in the TPM2 source may allow a privileged user to potentially enable an escalation of privilege via local access. This affects tpm2-tss before 3.0.1 and before 2.4.3. Una falta de inicialización de una variable en la fuente de TPM2 puede permitir a un usuario privilegiado habilitar potencialmente una escalada de privilegios por medio del acceso local. Esto afecta a tpm2-tss versiones anteriores a 3.0.1 y versiones anteriores a 2.4.3 • https://bugzilla.redhat.com/show_bug.cgi?id=1902167 https://github.com/tpm2-software/tpm2-tss/releases/tag/2.4.3 https://github.com/tpm2-software/tpm2-tss/releases/tag/3.0.1 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7KPOENCMJU4DMT3BDNUBRK25B3DJ47UO https://security.gentoo.org/glsa/202107-10 • CWE-909: Missing Initialization of Resource •