{"cve":{"cve_id":"CVE-2012-0840","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":0.43346,"epss_percentile":0.98561,"epss_as_of":"2026-06-23","description":"tables/apr_hash.c in the Apache Portable Runtime (APR) library through 1.4.5 computes hash values without restricting the ability to trigger hash collisions predictably, which allows context-dependent attackers to cause a denial of service (CPU consumption) via crafted input to an application that maintains a hash table.","published_at":"2012-02-10T19:00:00Z","last_modified_at":"2026-06-16T23:38:21.793000Z","cvss_v3_score":null,"cvss_v3_vector":null,"cvss_v3_severity":null,"cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":null,"ssvc_automatable":null,"ssvc_technical_impact":null,"cwes":["CWE-20"],"nvd_references":["http://mail-archives.apache.org/mod_mbox/apr-commits/201201.mbox/%3C20120115003715.071D423888FD%40eris.apache.org%3E","https://exchange.xforce.ibmcloud.com/vulnerabilities/73096","http://openwall.com/lists/oss-security/2012/02/08/3","http://www.mandriva.com/security/advisories?name=MDVSA-2012:019","http://secunia.com/advisories/47862","http://svn.apache.org/viewvc?rev=1231605&view=rev","http://www.mail-archive.com/dev%40apr.apache.org/msg24439.html","http://www.mail-archive.com/dev%40apr.apache.org/msg24472.html","http://openwall.com/lists/oss-security/2012/02/09/1","http://www.mail-archive.com/dev%40apr.apache.org/msg24473.html"],"vuln_status":"Modified","trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-24T00:09:39.878444Z","updated_at":"2026-06-28T23:06:10.043651Z"},"effective_severity":null,"badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":null,"metrics":[]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"apache","vendor_name":"apache","product_slug":"portable-runtime","product_name":"portable_runtime","version_start":null,"version_start_inclusive":null,"version_end":"1.4.5","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:apache:portable_runtime:*:*:*:*:*:*:*:*"},{"vendor_slug":"apache","vendor_name":"apache","product_slug":"portable-runtime","product_name":"portable_runtime","version_start":"0.9.1","version_start_inclusive":true,"version_end":"0.9.1","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:apache:portable_runtime:0.9.1:*:*:*:*:*:*:*"},{"vendor_slug":"apache","vendor_name":"apache","product_slug":"portable-runtime","product_name":"portable_runtime","version_start":"0.9.2","version_start_inclusive":true,"version_end":"0.9.2","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:apache:portable_runtime:0.9.2:*:*:*:*:*:*:*"},{"vendor_slug":"apache","vendor_name":"apache","product_slug":"portable-runtime","product_name":"portable_runtime","version_start":"0.9.2-dev","version_start_inclusive":true,"version_end":"0.9.2-dev","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:apache:portable_runtime:0.9.2-dev:*:*:*:*:*:*:*"},{"vendor_slug":"apache","vendor_name":"apache","product_slug":"portable-runtime","product_name":"portable_runtime","version_start":"0.9.3","version_start_inclusive":true,"version_end":"0.9.3","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:apache:portable_runtime:0.9.3:*:*:*:*:*:*:*"},{"vendor_slug":"apache","vendor_name":"apache","product_slug":"portable-runtime","product_name":"portable_runtime","version_start":"0.9.3-dev","version_start_inclusive":true,"version_end":"0.9.3-dev","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:apache:portable_runtime:0.9.3-dev:*:*:*:*:*:*:*"},{"vendor_slug":"apache","vendor_name":"apache","product_slug":"portable-runtime","product_name":"portable_runtime","version_start":"0.9.4","version_start_inclusive":true,"version_end":"0.9.4","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:apache:portable_runtime:0.9.4:*:*:*:*:*:*:*"},{"vendor_slug":"apache","vendor_name":"apache","product_slug":"portable-runtime","product_name":"portable_runtime","version_start":"0.9.5","version_start_inclusive":true,"version_end":"0.9.5","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:apache:portable_runtime:0.9.5:*:*:*:*:*:*:*"},{"vendor_slug":"apache","vendor_name":"apache","product_slug":"portable-runtime","product_name":"portable_runtime","version_start":"0.9.6","version_start_inclusive":true,"version_end":"0.9.6","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:apache:portable_runtime:0.9.6:*:*:*:*:*:*:*"},{"vendor_slug":"apache","vendor_name":"apache","product_slug":"portable-runtime","product_name":"portable_runtime","version_start":"0.9.7","version_start_inclusive":true,"version_end":"0.9.7","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:apache:portable_runtime:0.9.7:*:*:*:*:*:*:*"},{"vendor_slug":"apache","vendor_name":"apache","product_slug":"portable-runtime","product_name":"portable_runtime","version_start":"0.9.7-dev","version_start_inclusive":true,"version_end":"0.9.7-dev","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:apache:portable_runtime:0.9.7-dev:*:*:*:*:*:*:*"},{"vendor_slug":"apache","vendor_name":"apache","product_slug":"portable-runtime","product_name":"portable_runtime","version_start":"0.9.8","version_start_inclusive":true,"version_end":"0.9.8","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:apache:portable_runtime:0.9.8:*:*:*:*:*:*:*"},{"vendor_slug":"apache","vendor_name":"apache","product_slug":"portable-runtime","product_name":"portable_runtime","version_start":"0.9.9","version_start_inclusive":true,"version_end":"0.9.9","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:apache:portable_runtime:0.9.9:*:*:*:*:*:*:*"},{"vendor_slug":"apache","vendor_name":"apache","product_slug":"portable-runtime","product_name":"portable_runtime","version_start":"0.9.16-dev","version_start_inclusive":true,"version_end":"0.9.16-dev","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:apache:portable_runtime:0.9.16-dev:*:*:*:*:*:*:*"},{"vendor_slug":"apache","vendor_name":"apache","product_slug":"portable-runtime","product_name":"portable_runtime","version_start":"1.3.0","version_start_inclusive":true,"version_end":"1.3.0","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:apache:portable_runtime:1.3.0:*:*:*:*:*:*:*"},{"vendor_slug":"apache","vendor_name":"apache","product_slug":"portable-runtime","product_name":"portable_runtime","version_start":"1.3.1","version_start_inclusive":true,"version_end":"1.3.1","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:apache:portable_runtime:1.3.1:*:*:*:*:*:*:*"},{"vendor_slug":"apache","vendor_name":"apache","product_slug":"portable-runtime","product_name":"portable_runtime","version_start":"1.3.2","version_start_inclusive":true,"version_end":"1.3.2","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:apache:portable_runtime:1.3.2:*:*:*:*:*:*:*"},{"vendor_slug":"apache","vendor_name":"apache","product_slug":"portable-runtime","product_name":"portable_runtime","version_start":"1.3.3","version_start_inclusive":true,"version_end":"1.3.3","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:apache:portable_runtime:1.3.3:*:*:*:*:*:*:*"},{"vendor_slug":"apache","vendor_name":"apache","product_slug":"portable-runtime","product_name":"portable_runtime","version_start":"1.3.4","version_start_inclusive":true,"version_end":"1.3.4","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:apache:portable_runtime:1.3.4:*:*:*:*:*:*:*"},{"vendor_slug":"apache","vendor_name":"apache","product_slug":"portable-runtime","product_name":"portable_runtime","version_start":"1.3.4-dev","version_start_inclusive":true,"version_end":"1.3.4-dev","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:apache:portable_runtime:1.3.4-dev:*:*:*:*:*:*:*"},{"vendor_slug":"apache","vendor_name":"apache","product_slug":"portable-runtime","product_name":"portable_runtime","version_start":"1.3.5","version_start_inclusive":true,"version_end":"1.3.5","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:apache:portable_runtime:1.3.5:*:*:*:*:*:*:*"},{"vendor_slug":"apache","vendor_name":"apache","product_slug":"portable-runtime","product_name":"portable_runtime","version_start":"1.3.6","version_start_inclusive":true,"version_end":"1.3.6","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:apache:portable_runtime:1.3.6:*:*:*:*:*:*:*"},{"vendor_slug":"apache","vendor_name":"apache","product_slug":"portable-runtime","product_name":"portable_runtime","version_start":"1.3.6-dev","version_start_inclusive":true,"version_end":"1.3.6-dev","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:apache:portable_runtime:1.3.6-dev:*:*:*:*:*:*:*"},{"vendor_slug":"apache","vendor_name":"apache","product_slug":"portable-runtime","product_name":"portable_runtime","version_start":"1.3.7","version_start_inclusive":true,"version_end":"1.3.7","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:apache:portable_runtime:1.3.7:*:*:*:*:*:*:*"},{"vendor_slug":"apache","vendor_name":"apache","product_slug":"portable-runtime","product_name":"portable_runtime","version_start":"1.3.8","version_start_inclusive":true,"version_end":"1.3.8","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:apache:portable_runtime:1.3.8:*:*:*:*:*:*:*"},{"vendor_slug":"apache","vendor_name":"apache","product_slug":"portable-runtime","product_name":"portable_runtime","version_start":"1.3.9","version_start_inclusive":true,"version_end":"1.3.9","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:apache:portable_runtime:1.3.9:*:*:*:*:*:*:*"},{"vendor_slug":"apache","vendor_name":"apache","product_slug":"portable-runtime","product_name":"portable_runtime","version_start":"1.3.10","version_start_inclusive":true,"version_end":"1.3.10","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:apache:portable_runtime:1.3.10:*:*:*:*:*:*:*"},{"vendor_slug":"apache","vendor_name":"apache","product_slug":"portable-runtime","product_name":"portable_runtime","version_start":"1.3.11","version_start_inclusive":true,"version_end":"1.3.11","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:apache:portable_runtime:1.3.11:*:*:*:*:*:*:*"},{"vendor_slug":"apache","vendor_name":"apache","product_slug":"portable-runtime","product_name":"portable_runtime","version_start":"1.3.12","version_start_inclusive":true,"version_end":"1.3.12","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:apache:portable_runtime:1.3.12:*:*:*:*:*:*:*"},{"vendor_slug":"apache","vendor_name":"apache","product_slug":"portable-runtime","product_name":"portable_runtime","version_start":"1.3.13","version_start_inclusive":true,"version_end":"1.3.13","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:apache:portable_runtime:1.3.13:*:*:*:*:*:*:*"},{"vendor_slug":"apache","vendor_name":"apache","product_slug":"portable-runtime","product_name":"portable_runtime","version_start":"1.4.0","version_start_inclusive":true,"version_end":"1.4.0","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:apache:portable_runtime:1.4.0:*:*:*:*:*:*:*"},{"vendor_slug":"apache","vendor_name":"apache","product_slug":"portable-runtime","product_name":"portable_runtime","version_start":"1.4.1","version_start_inclusive":true,"version_end":"1.4.1","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:apache:portable_runtime:1.4.1:*:*:*:*:*:*:*"},{"vendor_slug":"apache","vendor_name":"apache","product_slug":"portable-runtime","product_name":"portable_runtime","version_start":"1.4.2","version_start_inclusive":true,"version_end":"1.4.2","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:apache:portable_runtime:1.4.2:*:*:*:*:*:*:*"},{"vendor_slug":"apache","vendor_name":"apache","product_slug":"portable-runtime","product_name":"portable_runtime","version_start":"1.4.3","version_start_inclusive":true,"version_end":"1.4.3","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:apache:portable_runtime:1.4.3:*:*:*:*:*:*:*"},{"vendor_slug":"apache","vendor_name":"apache","product_slug":"portable-runtime","product_name":"portable_runtime","version_start":"1.4.4","version_start_inclusive":true,"version_end":"1.4.4","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:apache:portable_runtime:1.4.4:*:*:*:*:*:*:*"}],"exploit_refs":[],"news":[],"references":[{"url":"http://mail-archives.apache.org/mod_mbox/apr-commits/201201.mbox/%3C20120115003715.071D423888FD%40eris.apache.org%3E","source_type":"MISC","tags":["patch"]},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/73096","source_type":"MISC","tags":[]},{"url":"http://openwall.com/lists/oss-security/2012/02/08/3","source_type":"MAILING_LIST","tags":["mailing-list"]},{"url":"http://www.mandriva.com/security/advisories?name=MDVSA-2012:019","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"http://secunia.com/advisories/47862","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"http://svn.apache.org/viewvc?rev=1231605&view=rev","source_type":"MISC","tags":[]},{"url":"http://www.mail-archive.com/dev%40apr.apache.org/msg24439.html","source_type":"MISC","tags":[]},{"url":"http://www.mail-archive.com/dev%40apr.apache.org/msg24472.html","source_type":"MISC","tags":[]},{"url":"http://openwall.com/lists/oss-security/2012/02/09/1","source_type":"MAILING_LIST","tags":["mailing-list"]},{"url":"http://www.mail-archive.com/dev%40apr.apache.org/msg24473.html","source_type":"MISC","tags":[]}],"timeline":[{"type":"published","at":"2012-02-10T19:00:00Z","label":"CVE published","source":null}]}