// For flags

CVE-2020-35452

mod_auth_digest possible stack overflow by one nul byte

Severity Score

7.3
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

Apache HTTP Server versions 2.4.0 to 2.4.46 A specially crafted Digest nonce can cause a stack overflow in mod_auth_digest. There is no report of this overflow being exploitable, nor the Apache HTTP Server team could create one, though some particular compiler and/or compilation option might make it possible, with limited consequences anyway due to the size (a single byte) and the value (zero byte) of the overflow

Apache HTTP Server versiones 2.4.0 a 2.4.46 Un Digest nonce especialmente diseñado puede causar un desbordamiento de pila en la función mod_auth_digest. No existe reportes de que este desbordamiento sea explotable, ni el equipo del Servidor HTTP Apache podría crear uno, aunque algún compilador y/o opción de compilación particular podría hacerlo posible, con consecuencias limitadas de todos modos debido al tamaño (un solo byte) y el valor (cero bytes) del desbordamiento

A flaw was found in Apache httpd. The mod_auth_digest has a single zero byte stack overflow. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

*Credits: This issue was discovered and reported by GHSL team member @antonio-morales (Antonio Morales)
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
Low
Attack Vector
Network
Attack Complexity
Medium
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2020-12-14 CVE Reserved
  • 2021-06-10 CVE Published
  • 2024-08-04 CVE Updated
  • 2024-08-11 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-787: Out-of-bounds Write
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Apache
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Http Server
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>= 2.4.0 <= 2.4.46
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-
Affected
Debian
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Debian Linux
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9.0
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-
Affected
Debian
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Debian Linux
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10.0
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-
Affected
Fedoraproject
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Fedora
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34
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-
Affected
Fedoraproject
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Fedora
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35
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-
Affected
Oracle
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Enterprise Manager Ops Center
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12.4.0.0
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-
Affected
Oracle
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Instantis Enterprisetrack
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17.1
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-
Affected
Oracle
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Instantis Enterprisetrack
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17.2
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-
Affected
Oracle
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Instantis Enterprisetrack
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17.3
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-
Affected
Oracle
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Zfs Storage Appliance Kit
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8.8
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-
Affected