diff --git a/code/cves/2024/CVE-2024-3094.yaml b/code/cves/2024/CVE-2024-3094.yaml new file mode 100644 index 0000000000..1e2c46caeb --- /dev/null +++ b/code/cves/2024/CVE-2024-3094.yaml @@ -0,0 +1,61 @@ +id: CVE-2024-3094 + +info: + name: XZ - Embedded Malicious Code + author: pdteam + severity: critical + description: | + Malicious code was discovered in the upstream tarballs of xz, starting with version 5.6.0. Through a series of complex obfuscations, the liblzma build process extracts a prebuilt object file from a disguised test file existing in the source code, which is then used to modify specific functions in the liblzma code. This results in a modified liblzma library that can be used by any software linked against this library, intercepting and modifying the data interaction with this library. + reference: + - https://www.openwall.com/lists/oss-security/2024/03/29/4 + - https://access.redhat.com/security/cve/CVE-2024-3094 + - https://arstechnica.com/security/2024/03/backdoor-found-in-widely-used-linux-utility-breaks-encrypted-ssh-connections/ + - https://aws.amazon.com/security/security-bulletins/AWS-2024-002/ + - https://bugzilla.redhat.com/show_bug.cgi?id=2272210 + classification: + cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H + cvss-score: 10 + cve-id: CVE-2024-3094 + cwe-id: CWE-506 + epss-score: 0.00079 + epss-percentile: 0.32887 + cpe: cpe:2.3:a:tukaani:xz:5.6.0:*:*:*:*:*:*:* + metadata: + verified: true + vendor: tukaani + product: xz + tags: cve,cve2024,local,code,xz,backdoor + +self-contained: true +code: + - engine: + - sh + - bash + source: | + # find path to liblzma used by sshd + path="$(ldd $(which sshd) | grep liblzma | grep -o '/[^ ]*')" + + # does it even exist? + if [ "$path" == "" ] + then + echo probably not vulnerable + exit + fi + + # check for function signature + if hexdump -ve '1/1 "%.2x"' "$path" | grep -q f30f1efa554889f54c89ce5389fb81e7000000804883ec28488954241848894c2410 + then + echo probably vulnerable + else + echo probably not vulnerable + fi + + matchers: + - type: word + words: + - "probably vulnerable" + + extractors: + - type: dsl + dsl: + - response