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                            CERT-Renater

                Note d'Information No. 2025/VULN676
_____________________________________________________________________

DATE                : 08/10/2025

HARDWARE PLATFORM(S): /

OPERATING SYSTEM(S): Systems running Go versions prior to 1.25.2, 
                                          1.24.8.

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https://groups.google.com/g/golang-nuts/c/Gxn25BP4MXk/m/3KrM-XBOBAAJ
_____________________________________________________________________

Photo du profil de anno...@golang.org
anno...@golang.org

7 oct. 2025, 20:51:50 
à golan...@googlegroups.com

Hello gophers,

We have just released Go versions 1.25.2 and 1.24.8, minor point
releases.

These minor releases include 10 security fixes following the security
policy:

    net/mail: excessive CPU consumption in ParseAddress

    The ParseAddress function constructed domain-literal address
components through repeated string concatenation. When parsing large
domain-literal components, this could cause excessive CPU consumption.

    Thanks to Philippe Antoine (Catena cyber) for reporting this
issue.

    This is CVE-2025-61725 and Go issue https://go.dev/issue/75680.

    crypto/x509: quadratic complexity when checking name constraints

    Due to the design of the name constraint checking algorithm, the
processing time
    of some inputs scales non-linearly with respect to the size of the
certificate.

    This affects programs which validate arbitrary certificate chains.

    Thanks to Jakub Ciolek for reporting this issue.

    This is CVE-2025-58187 and Go issue https://go.dev/issue/75681.

    crypto/tls: ALPN negotiation errors can contain arbitrary text

    The crypto/tls conn.Handshake method returns an error on the
server-side when
    ALPN negotation fails which can contain arbitrary attacker controlled
    information provided by the client-side of the connection which is
not escaped.

    This affects programs which log these errors without any additional
form of
    sanitization, and may allow injection of attacker controlled
information into logs.

    Thanks to National Cyber Security Centre Finland for reporting this
issue.

    This is CVE-2025-58189 and Go issue https://go.dev/issue/75652.

    encoding/pem: quadratic complexity when parsing some invalid inputs

    Due to the design of the PEM parsing function, the processing time
for some
    inputs scales non-linearly with respect to the size of the input.

    This affects programs which parse untrusted PEM inputs.

    Thanks to Jakub Ciolek for reporting this issue.

    This is CVE-2025-61723 and Go issue https://go.dev/issue/75676.

    net/url: insufficient validation of bracketed IPv6 hostnames

    The Parse function permitted values other than IPv6 addresses to
be included in square brackets within the host component of a URL.
RFC 3986 permits IPv6 addresses to be included within the host
component, enclosed within square brackets. For example:
"http://[::1]/". IPv4 addresses and hostnames must not appear within
square brackets. Parse did not enforce this requirement.

    Thanks to Enze Wang, Jingcheng Yang and Zehui Miao of Tsinghua
University for reporting this issue.

    This is CVE-2025-47912 and Go issue https://go.dev/issue/75678.

    encoding/asn1: pre-allocating memory when parsing DER payload
can cause memory exhaustion

    When parsing DER payloads, memories were being allocated prior
to fully validating the payloads.
    This permits an attacker to craft a big empty DER payload to
cause memory exhaustion in functions such as asn1.Unmarshal,
x509.ParseCertificateRequest, and ocsp.ParseResponse.

    Thanks to Jakub Ciolek for reporting this issue.

    This is CVE-2025-58185 and Go issue https://go.dev/issue/75671.

    net/http: lack of limit when parsing cookies can cause memory
exhaustion

    Despite HTTP headers having a default limit of 1 MB, the number
of cookies that can be parsed did not have a limit.
    By sending a lot of very small cookies such as "a=;", an
attacker can make an HTTP server allocate a large amount of structs,
causing large memory consumption.

    net/http now limits the number of cookies accepted to 3000,
which can be adjusted using the httpcookiemaxnum GODEBUG option.

    Thanks to jub0bs for reporting this issue.

    This is CVE-2025-58186 and Go issue https://go.dev/issue/75672.

    crypto/x509: panic when validating certificates with DSA
public keys

    Validating certificate chains which contain DSA public keys can
cause programs
    to panic, due to a interface cast that assumes they implement the
Equal method.

    This affects programs which validate arbitrary certificate
chains.

    Thanks to Jakub Ciolek for reporting this issue.

    This is CVE-2025-58188 and Go issue https://go.dev/issue/75675.

    archive/tar: unbounded allocation when parsing GNU sparse map

    tar.Reader did not set a maximum size on the number of sparse
region data blocks in GNU tar pax 1.0 sparse files. A
maliciously-crafted archive containing a large number of sparse
regions could cause a Reader to read an unbounded amount of data
from the archive into memory. When reading from a compressed
source, a small compressed input could result in large
allocations.

    Thanks to Harshit Gupta (Mr HAX) -
https://www.linkedin.com/in/iam-harshit-gupta/ for reporting this
issue.

    This is CVE-2025-58183 and Go issue https://go.dev/issue/75677.

    net/textproto: excessive CPU consumption in Reader.ReadResponse

    The Reader.ReadResponse function constructed a response string
through
    repeated string concatenation of lines. When the number of lines
in a response is large,
    this could cause excessive CPU consumption.


    Thanks to Jakub Ciolek for reporting this issue.

    This is CVE-2025-61724 and Go issue https://go.dev/issue/75716.


View the release notes for more information:
https://go.dev/doc/devel/release#go1.25.2

You can download binary and source distributions from the Go website:
https://go.dev/dl/


To compile from source using a Git clone, update to the release with
git checkout go1.25.2 and build as usual.


Thanks to everyone who contributed to the releases.


Cheers,
Michael and Carlos for the Go team


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