CVE-2021-34798
NULL pointer dereference in httpd core
HIGH
7.5
CVSS Score
Published: September 16, 2021 at 02:40 PM UTC
Updated: June 17, 2026 at 03:56 AM UTC
18 products affected across 8 vendorsDebian LinuxFedoraPeopleSoft Enterprise PeopleTools
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Severity
HIGH7.5
Exploit prediction
EPSS 65%
Description
Malformed requests may cause the server to dereference a NULL pointer. This issue affects Apache HTTP Server 2.4.48 and earlier.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
All versions
Debian Linux· Debiandrupal
95%Cloud Backup· NetAppdrupal
95%All versions
All versions
All versions
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
- http://httpd.apache.org/security/vulnerabilities_24.html
- https://cert-portal.siemens.com/productcert/pdf/ssa-685781.pdf
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SPBR6WUYBJNACHKE65SPL7TJOHX7RHWD/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZNCYSR3BXT36FFF4XTCPL3HDQK4VP45R/
- https://security.gentoo.org/glsa/202208-20
References (17)
x_refsource_MISCRelease NotesVendor Advisory
Source: [email protected]
http://httpd.apache.org/security/vulnerabilities_24.htmlx_refsource_CONFIRMPatchThird Party Advisory
Source: [email protected]
https://cert-portal.siemens.com/productcert/pdf/ssa-685781.pdfx_refsource_CONFIRMThird Party Advisory
Source: [email protected]
https://kc.mcafee.com/corporate/index?page=content&id=SB10379Mailing Listx_refsource_MLIST
Source: [email protected]
https://lists.apache.org/thread.html/r3925e167d5eb1c75def3750c155d753064e1d34a143028bb32910432%40%3Cusers.httpd.apache.org%3EMailing Listx_refsource_MLIST
Source: [email protected]
https://lists.apache.org/thread.html/r61fdbfc26ab170f4e6492ef3bd5197c20b862ce156e9d5a54d4b899c%40%3Cusers.httpd.apache.org%3EMailing Listx_refsource_MLIST
Source: [email protected]
https://lists.apache.org/thread.html/r82838efc5fa6fc4c73986399c9b71573589f78b31846aff5bd9b1697%40%3Cusers.httpd.apache.org%3EMailing Listx_refsource_MLIST
Source: [email protected]
https://lists.apache.org/thread.html/r82c077663f9759c7df5a6656f925b3ee4f55fcd33c889ba7cd687029%40%3Cusers.httpd.apache.org%3EMailing Listx_refsource_MLISTThird Party Advisory
Source: [email protected]
https://lists.debian.org/debian-lts-announce/2021/10/msg00001.htmlCVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- NONE
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-476
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