by Kastro
Paper/Archive/CVE-2021-26691

CVE-2021-26691

Apache Software Foundation Apache HTTP Server — Apache HTTP Server mod_session response handling heap overflow

EPSS 68%CVSS 9.8
critical.is priorityof 100
49
CVSS 9.8 (NVD)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 99.3.993 × 2019.9No public exploit+100.0SSVC exploitation: unknown+100.0
Description · from the CVE record

In Apache HTTP Server versions 2.4.0 to 2.4.46 a specially crafted SessionHeader sent by an origin server could cause a heap overflow

Affected

ProductAffectedFixed inSource
Apache HTTP Server2.4.46–CNA
Apache HTTP Server2.4.43–CNA
Apache HTTP Server2.4.41–CNA
Apache HTTP Server2.4.39–CNA
Apache HTTP Server2.4.38–CNA
Apache HTTP Server2.4.37–CNA
Apache HTTP Server2.4.35–CNA
Apache HTTP Server2.4.34–CNA
Apache HTTP Server2.4.33–CNA
Apache HTTP Server2.4.29–CNA
Apache HTTP Server2.4.28–CNA
Apache HTTP Server2.4.27–CNA

Scores by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

refhttpd.apache.org/security/vulnerabilities_24.htmlreflists.apache.org/thread.html/re026d3da9d7824bd93b9f871c0fdda978d960c7e62d8c43cba8d0bf3%40%3Ccvs.httpd.apache.org%3Ereflists.apache.org/thread.html/r50cae1b71f1e7421069036b213c26da7d8f47dd59874e3bd956959fe%40%3Cannounce.httpd.apache.org%3Ereflists.apache.org/thread.html/r7f2b70b621651548f4b6f027552f1dd91705d7111bb5d15cda0a68dd%40%3Cdev.httpd.apache.org%3Erefopenwall.com/lists/oss-security/2021/06/10/7reflists.debian.org/debian-lts-announce/2021/07/msg00006.htmladvisorydebian.org/security/2021/dsa-4937advisorysecurity.gentoo.org/glsa/202107-38advisorylists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SPBR6WUYBJNACHKE65SPL7TJOHX7RHWDadvisorylists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZNCYSR3BXT36FFF4XTCPL3HDQK4VP45Rreforacle.com/security-alerts/cpuoct2021.htmlrefsecurity.netapp.com/advisory/ntap-20210702-0001reforacle.com/security-alerts/cpujan2022.html