CVE-2021-31525

net/http in Go before 1.15.12 and 1.16.x before 1.16.4 allows remote attackers to cause a denial of service (panic) via a large header to ReadRequest or ReadResponse. Server, Transport, and Client can each be affected in some configurations.

net/http in Go before 1.15.12 and 1.16.x before 1.16.4 allows remote attackers to cause a denial of service (panic) via a large header to ReadRequest or ReadResponse. Server, Transport, and Client can each be affected in some configurations.

golang.org/x/net/http/httpguts in Go before 1.15.12 and 1.16.x before 1.16.4 allows remote attackers to cause a denial of service (panic) via a large header to ReadRequest or ReadResponse. Server, Transport, and Client can each be affected in some configurations.

Go Toolset provides the Go programming language tools and libraries. Go is alternatively known as golang.

The following packages have been upgraded to a later upstream version: golang (1.15.14). (BZ#1982287)

Security Fix(es):

• golang: encoding/xml: infinite loop when using xml.NewTokenDecoder with a custom TokenReader (CVE-2021-27918)

• golang: net/http: panic in ReadRequest and ReadResponse when reading a very large header (CVE-2021-31525)

• golang: archive/zip: malformed archive may cause panic or memory exhaustion (CVE-2021-33196)

• golang: crypto/tls: certificate of wrong type is causing TLS client to panic (CVE-2021-34558)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Bug Fix(es):

• FIPS mode AES CBC CryptBlocks incorrectly re-initializes IV in file crypto/internal/boring/aes.go (BZ#1978567)

• FIPS mode AES CBC Decrypter produces incorrect result (BZ#1983976)

net/http in Go before 1.15.12 and 1.16.x before 1.16.4 allows remote attackers to cause a denial of service (panic) via a large header to ReadRequest or ReadResponse. Server, Transport, and Client can each be affected in some configurations.

net/http in Go before 1.15.12 and 1.16.x before 1.16.4 allows remote attackers to cause a denial of service (panic) via a large header to ReadRequest or ReadResponse. Server, Transport, and Client can each be affected in some configurations.

A malicious HTTP server or client can cause the net/http client or server to panic.

ReadRequest and ReadResponse can hit an unrecoverable panic when reading a very large header (over 7MB on 64-bit architectures, or over 4MB on 32-bit ones). Transport and Client are vulnerable and the program can be made to crash by a malicious server. Server is not vulnerable by default, but can be if the default max header of 1MB is overridden by setting Server.MaxHeaderBytes to a higher value, in which case the program can be made to crash by a malicious client.

This also affects golang.org/x/net/http2/h2c and HeaderValuesContainsToken in golang.org/x/net/http/httpguts.

encoding/xml in Go before 1.15.9 and 1.16.x before 1.16.1 has an infinite loop if a custom TokenReader (for xml.NewTokenDecoder) returns EOF in the middle of an element. This can occur in the Decode, DecodeElement, or Skip method (CVE-2021-27918).

net/http in Go before 1.15.12 and 1.16.x before 1.16.4 allows remote attackers to cause a denial of service (panic) via a large header to ReadRequest or ReadResponse. Server, Transport, and Client can each be affected in some configurations (CVE-2021-31525).

A security issue has been found in Go before version 1.16.5. The LookupCNAME, LookupSRV, LookupMX, LookupNS, and LookupAddr functions in net, and their respective methods on the Resolver type may return arbitrary values retrieved from DNS which do not follow the established RFC 1035 rules for domain names. If these names are used without further sanitization, for instance unsafely included in HTML, they may allow for injection of unexpected content. Note that LookupTXT may still return arbitrary values that could require sanitization before further use (CVE-2021-33195).

A security issue has been found in Go. Due to a pre-allocation optimization in zip.NewReader, a malformed archive which indicates it has a significant number of files can cause either a panic or memory exhaustion (CVE-2021-33196).

ReverseProxy fails to delete the Connection headers (as well as other legacy hop-by-hop headers, which however per RFC 7230 need to also be specified in Connection) if there are multiple ones and the first is empty, due to an incorrect Get(h) == "" check. This can lead to a security issue if the proxy is adding an important header, like X-Forwarded-For, and is sitting in front of another proxy which can be instructed by an attacker to drop that header as a hop-by-hop header (CVE-2021-33197).

A security issue has been found in Go before version 1.16.5. The SetString and UnmarshalText methods of math/big.Rat may cause a panic or an unrecoverable fatal error if passed inputs with very large exponents (CVE-2021-33198).

The crypto/tls package of Go through 1.16.5 does not properly assert that the type of public key in an X.509 certificate matches the expected type when doing a RSA based key exchange, allowing a malicious TLS server to cause a TLS client to panic (CVE-2021-34558).

This update for go1.15 fixes the following issues:

• Updated go to upstream version 1.15.12 (released 2021-05-06) (bsc#1175132).
• CVE-2021-31525: Fixed stack overflow via net/http ReadRequest (bsc#1185790).

This update was imported from the SUSE:SLE-15:Update update project.

These are all security issues fixed in the go1.15-1.15.15-1.2 package on the GA media of openSUSE Tumbleweed.

These are all security issues fixed in the go1.16-1.16.8-1.1 package on the GA media of openSUSE Tumbleweed.

This update for go1.15 fixes the following issues:

• Updated go to upstream version 1.15.12 (released 2021-05-06) (bsc#1175132).
• CVE-2021-31525: Fixed stack overflow via net/http ReadRequest (bsc#1185790).

This update for go1.16 fixes the following issues:

• Updated go to upstream version 1.16.4 (released 2021-05-06) (bsc#1182345).
• CVE-2021-31525: Fixed stack overflow via net/http ReadRequest (bsc#1185790).