CVE-2021-26691
Apache HTTP Server mod_session response handling heap overflow
Severity Score
9.8
*CVSS v3.1
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
0
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
-
*SSVC
Descriptions
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
Apache HTTP Server versiones 2.4.0 a 2.4.46 , un parámetro SessionHeader especialmente diseñado enviado por un servidor de origen podría causar un desbordamiento de pila
A heap overflow flaw was found In Apache httpd mod_session. The highest threat from this vulnerability is to system availability.
*Credits:
Discovered internally Christophe Jaillet
CVSS Scores
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Attack Vector
Attack Complexity
Authentication
Confidentiality
Integrity
Availability
* Common Vulnerability Scoring System
SSVC
- Decision:-
Exploitation
Automatable
Tech. Impact
* Organization's Worst-case Scenario
Timeline
- 2021-02-04 CVE Reserved
- 2021-06-10 CVE Published
- 2024-08-03 CVE Updated
- 2024-11-13 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer
- CWE-122: Heap-based Buffer Overflow
- CWE-787: Out-of-bounds Write
CAPEC
References (15)
URL | Date | SRC |
---|
URL | Date | SRC |
---|---|---|
https://www.oracle.com/security-alerts/cpujan2022.html | 2023-11-07 | |
https://www.oracle.com/security-alerts/cpuoct2021.html | 2023-11-07 |
Affected Vendors, Products, and Versions
Vendor | Product | Version | Other | Status | ||||||
---|---|---|---|---|---|---|---|---|---|---|
Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
Apache Search vendor "Apache" | Http Server Search vendor "Apache" for product "Http Server" | >= 2.4.0 <= 2.4.46 Search vendor "Apache" for product "Http Server" and version " >= 2.4.0 <= 2.4.46" | - |
Affected
| ||||||
Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 9.0 Search vendor "Debian" for product "Debian Linux" and version "9.0" | - |
Affected
| ||||||
Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 10.0 Search vendor "Debian" for product "Debian Linux" and version "10.0" | - |
Affected
| ||||||
Fedoraproject Search vendor "Fedoraproject" | Fedora Search vendor "Fedoraproject" for product "Fedora" | 34 Search vendor "Fedoraproject" for product "Fedora" and version "34" | - |
Affected
| ||||||
Fedoraproject Search vendor "Fedoraproject" | Fedora Search vendor "Fedoraproject" for product "Fedora" | 35 Search vendor "Fedoraproject" for product "Fedora" and version "35" | - |
Affected
| ||||||
Oracle Search vendor "Oracle" | Enterprise Manager Ops Center Search vendor "Oracle" for product "Enterprise Manager Ops Center" | 12.4.0.0 Search vendor "Oracle" for product "Enterprise Manager Ops Center" and version "12.4.0.0" | - |
Affected
| ||||||
Oracle Search vendor "Oracle" | Instantis Enterprisetrack Search vendor "Oracle" for product "Instantis Enterprisetrack" | 17.1 Search vendor "Oracle" for product "Instantis Enterprisetrack" and version "17.1" | - |
Affected
| ||||||
Oracle Search vendor "Oracle" | Instantis Enterprisetrack Search vendor "Oracle" for product "Instantis Enterprisetrack" | 17.2 Search vendor "Oracle" for product "Instantis Enterprisetrack" and version "17.2" | - |
Affected
| ||||||
Oracle Search vendor "Oracle" | Instantis Enterprisetrack Search vendor "Oracle" for product "Instantis Enterprisetrack" | 17.3 Search vendor "Oracle" for product "Instantis Enterprisetrack" and version "17.3" | - |
Affected
| ||||||
Oracle Search vendor "Oracle" | Secure Backup Search vendor "Oracle" for product "Secure Backup" | < 18.1.0.1.0 Search vendor "Oracle" for product "Secure Backup" and version " < 18.1.0.1.0" | - |
Affected
| ||||||
Oracle Search vendor "Oracle" | Zfs Storage Appliance Kit Search vendor "Oracle" for product "Zfs Storage Appliance Kit" | 8.8 Search vendor "Oracle" for product "Zfs Storage Appliance Kit" and version "8.8" | - |
Affected
| ||||||
Netapp Search vendor "Netapp" | Cloud Backup Search vendor "Netapp" for product "Cloud Backup" | - | - |
Affected
|