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CVE-2020-35452

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
7.3
CVSS
2.9
ShadowTrackr
NO
CISA KEV
-
NCSC.nl
CVSS v4.0 Metrics
Exploitability
Attack VectorNetwork
ComplexityLow
RequirementsPresent
PrivilegesNone
User InteractionNone
Threat
Exploit MaturityPoC
Vulnerable System
ConfidentialityLow
IntegrityLow
AvailabilityLow
Subsequent System
ConfidentialityNone
IntegrityNone
AvailabilityNone
Supplemental
SafetyNegligible
AutomatableYes
RecoveryAutomatic
Value DensityConcentrated
UrgencyMedium
Patch StatusUnavailable

Change Log
DateSourceChangesScore
2026-07-21PoCE: U→P1.7 → 2.9
2026-07-21nvdAV: P→N, AC: H→L, PR: H→N, UI: A→N, VC: N→L, VI: N→L, VA: N→L0.0 → 1.7
2026-07-21cve.orginitial, patch: Unavailable0.0
References: CVE.org · NVD · PoC

Affected Software
VendorProductVersion
apachehttp_server≥ 2.4.0, ≤ 2.4.46
Apache Software FoundationApache HTTP Server2.4.0
Apache Software FoundationApache HTTP Server2.4.1
Apache Software FoundationApache HTTP Server2.4.10
Apache Software FoundationApache HTTP Server2.4.12
Apache Software FoundationApache HTTP Server2.4.16
Apache Software FoundationApache HTTP Server2.4.17
Apache Software FoundationApache HTTP Server2.4.18
Apache Software FoundationApache HTTP Server2.4.2
Apache Software FoundationApache HTTP Server2.4.20
Apache Software FoundationApache HTTP Server2.4.23
Apache Software FoundationApache HTTP Server2.4.25
Apache Software FoundationApache HTTP Server2.4.26
Apache Software FoundationApache HTTP Server2.4.27
Apache Software FoundationApache HTTP Server2.4.28
Apache Software FoundationApache HTTP Server2.4.29
Apache Software FoundationApache HTTP Server2.4.3
Apache Software FoundationApache HTTP Server2.4.33
Apache Software FoundationApache HTTP Server2.4.34
Apache Software FoundationApache HTTP Server2.4.35
Apache Software FoundationApache HTTP Server2.4.37
Apache Software FoundationApache HTTP Server2.4.38
Apache Software FoundationApache HTTP Server2.4.39
Apache Software FoundationApache HTTP Server2.4.4
Apache Software FoundationApache HTTP Server2.4.41
Apache Software FoundationApache HTTP Server2.4.43
Apache Software FoundationApache HTTP Server2.4.46
Apache Software FoundationApache HTTP Server2.4.6
Apache Software FoundationApache HTTP Server2.4.7
Apache Software FoundationApache HTTP Server2.4.9
debiandebian_linux10.0
debiandebian_linux9.0
fedoraprojectfedora34
fedoraprojectfedora35
oracleenterprise_manager_ops_center12.4.0.0
oracleinstantis_enterprisetrack17.1
oracleinstantis_enterprisetrack17.2
oracleinstantis_enterprisetrack17.3
oraclezfs_storage_appliance_kit8.8
Published: 2021-06-10