#VU77527 Reachable Assertion in Rekor - CVE-2023-33199

Vulnerability identifier: #VU77527

Vulnerability risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-33199

CWE-ID: CWE-617

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Rekor

Vendor: Sigstore

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a reachable assertion. A remote attacker can pass a malformed proposed entry of the "intoto/v0.0.2" type to the application can perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Rekor: 0.1.0 - 1.1.1

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External links
https://github.com/sigstore/rekor/commit/140c5add105179e5ffd9e3e114fd1b6b93aebbd4
https://github.com/sigstore/rekor/security/advisories/GHSA-frqx-jfcm-6jjr

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.