CVE-2019-12420: apache apache spamassassin Uncontrolled Resource Consumption
Vulnerability summary
CVE-2019-12420 is a high (CVSS 7.5) Uncontrolled Resource Consumption vulnerability in apache apache spamassassin. EPSS estimates a 7.23% chance of exploitation in the next 30 days, higher than 94.3% of scored vulnerabilities.
Severe, CVSS 7.5 (NVD); no exploitation reported by the 5 checked sources; EPSS 7% (FIRST, 03-11-2026)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 11 · Related 7Timeline
- 12-12-2019PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
In Apache SpamAssassin before 3.4.3, a message can be crafted in a way to use excessive resources. Upgrading to SA 3.4.3 as soon as possible is the recommended fix but details will not be shared publicly.
CVSS metrics
6 scores · 5 sources · 2 versions- OSV · AlpineEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · Red hatEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
7.23%
Chance of exploitation in the next 30 days
Percentile
94%
Versus all other CVEs
30-day change
No change 0.00 pp
From 7.23% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Apache2 products
- apache spamassassinApache SpamAssassin prior to 3.4.3
- spamassassin< 3.4.3
Debian2 products
- spamassassin< 3.4.3~rc6-1
- debian_linuxEOL8.0 | 9.0 | 10.0
Redhat2 products
- spamassassin< 0:3.4.0-6.el7
- spamassassin-debuginfo< 0:3.4.0-6.el7
Alpine1 product
- spamassassin< 3.4.3-r0
Ubuntu1 product
- spamassassin< 3.4.2-0ubuntu0.14.04.1+esm1 | < 3.4.2-0ubuntu0.16.04.2 | < 3.4.2-0ubuntu0.18.04.2
5 vendors · 8 products
References
34 links- www.openwall.com/lists/oss-security/2019/12/12/2Mailing ListX Refsource MLISTThird Party AdvisoryREPORT
- svn.apache.org/repos/asf/spamassassin/branches/3.4/build/announcements/3.4.3.txtX Refsource CONFIRMMailing ListVendor AdvisoryREPORT
- lists.debian.org/debian-lts-announce/2019/12/msg00019.htmlMailing ListX Refsource MLISTThird Party Advisory
Show all 34 references
- svn.apache.org/r1866128REPORT