Go
CVE-2021-29923
HIGH
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Lifecycle Timeline
1DescriptionNVD
Go before 1.17 does not properly consider extraneous zero characters at the beginning of an IP address octet, which (in some situations) allows attackers to bypass access control that is based on IP addresses, because of unexpected octal interpretation. This affects net.ParseIP and net.ParseCIDR.
AnalysisAI
Go before 1.17 does not properly consider extraneous zero characters at the beginning of an IP address octet, which (in some situations) allows attackers to bypass access control that is based on IP. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.
Technical ContextAI
Go before 1.17 does not properly consider extraneous zero characters at the beginning of an IP address octet, which (in some situations) allows attackers to bypass access control that is based on IP addresses, because of unexpected octal interpretation. This affects net.ParseIP and net.ParseCIDR. Affected products include: Golang Go, Oracle Timesten In-Memory Database, Fedoraproject Fedora. Version information: before 1.17.
RemediationAI
A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.
The net/http package in Go through 1.6 does not attempt to address RFC 3875 section 4.1.18 namespace conflicts and there
Critical certificate validation bypass in Go crypto/tls during session resumption. If ClientCAs or RootCAs fields are mu
net/url in Go before 1.11.13 and 1.12.x before 1.12.8 mishandles malformed hosts in URLs, leading to an authorization by
The "go get" implementation in Go 1.9.4, when the -insecure command-line option is used, does not validate the import pa
The net/http library in net/textproto/reader.go in Go before 1.4.3 does not properly parse HTTP header keys, which allow
A spoofing vulnerability exists in the way Windows CryptoAPI (Crypt32.dll) validates Elliptic Curve Cryptography (ECC) c
Go through 1.12 on Windows misuses certain LoadLibrary functionality, leading to DLL injection. Rated high severity (CVS
Go before 1.8.7, Go 1.9.x before 1.9.4, and Go 1.10 pre-releases before Go 1.10rc2 allow "go get" remote command executi
The net/url package does not set a limit on the number of query parameters in a query. While the maximum size of query p
Requests forwarded by ReverseProxy include the raw query parameters from the inbound request, including unparsable param
A too-short encoded message can cause a panic in Float.GobDecode and Rat GobDecode in math/big in Go before 1.17.13 and
Infinite loop in Read in crypto/rand before Go 1.17.11 and Go 1.18.3 on Windows allows attacker to cause an indefinite h
Same technique Authentication Bypass
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External POC / Exploit Code
Leaving vuln.today