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Vulnerability record · CVE-2019-20800 · published 18 May 2020

CVE-2019-20800: Cherokee-project cherokee out-of-bounds write vulnerability

Cherokee Project · Cherokee

In Cherokee through 1.2.104, remote attackers can trigger an out-of-bounds write in cherokee_handler_cgi_add_env_pair in handler_cgi.c by sending many request headers, as demonstrated by a GET request with many "Host: 127.0.0.1" headers.

9.8 CVSS 3.1 Critical EPSS 2.1% · top 18.6% CWE-787 · Out-of-bounds write
9.8CVSS 3.1 base score, v2 7.5
2.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References, 4 tagged exploit
17 Jun 2026Last modified by NVD

Description

In Cherokee through 1.2.104, remote attackers can trigger an out-of-bounds write in cherokee_handler_cgi_add_env_pair in handler_cgi.c by sending many request headers, as demonstrated by a GET request with many "Host: 127.0.0.1" headers.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/cherokee/webserver/issues/1224 ExploitThird Party Advisory
https://logicaltrust.net/blog/2019/11/cherokee.html ExploitThird Party Advisory
https://security.gentoo.org/glsa/202012-09 Third Party Advisory
https://github.com/cherokee/webserver/issues/1224 ExploitThird Party Advisory
https://logicaltrust.net/blog/2019/11/cherokee.html ExploitThird Party Advisory
https://security.gentoo.org/glsa/202012-09 Third Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.4CVE-2019-20798Cherokee-project cherokee cross-site scripting vulnerabilityAn XSS issue was discovered in handler_server_info.c in Cherokee through 1.2.104. The requested URL is improperly displayed on the About page in the …EPSS 1.7%7.5CVE-2020-12845Cherokee-project cherokee null pointer dereference vulnerabilityCherokee 0.4.27 to 1.2.104 is affected by a denial of service due to a NULL pointer dereferences. A remote unauthenticated attacker can crash the ser…EPSS 3.2%7.5CVE-2019-20799Cherokee-project cherokee out-of-bounds write vulnerabilityIn Cherokee through 1.2.104, multiple memory corruption errors may be used by a remote attacker to destabilize the work of a server.EPSS 2.4%6.8CVE-2014-4668Fedoraproject fedora improper authentication vulnerabilityThe cherokee_validator_ldap_check function in validator_ldap.c in Cherokee 1.2.103 and earlier, when LDAP is used, does not properly consider unauthe…EPSS 2.8%6.8CVE-2011-2191Cherokee-project cherokee cross-site request forgery vulnerabilityCross-site request forgery (CSRF) vulnerability in Cherokee-admin in Cherokee before 1.2.99 allows remote attackers to hijack the authentication of a…EPSS 1.4%5.0CVE-2009-4489Cherokee-project cherokee improper input validation vulnerabilityheader.c in Cherokee before 0.99.32 writes data to a log file without sanitizing non-printable characters, which might allow remote attackers to modi…EPSS 9.8%2.1CVE-2011-2190Cherokee-project cherokee vulnerabilityThe generate_admin_password function in Cherokee before 1.2.99 uses time and PID values for seeding of a random number generator, which makes it easi…EPSS 0.33%8.8CVE-2026-53266Linux kernel ebtables SNAT out-of-bounds write in ARP rewriteThe ebtables SNAT target rewrites the ARP sender hardware address via skb_store_bits() without first making that range writable. When the ARP SHA byt…KEVEPSS 0.65%analysed

Source: NIST National Vulnerability Database (record CVE-2019-20800), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.