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Message-ID: <01e3014e-85d8-484c-b755-bd8eb6ddd10d@oracle.com>
Date: Thu, 15 Jan 2026 13:02:14 -0800
From: Alan Coopersmith <alan.coopersmith@...cle.com>
To: oss-security@...ts.openwall.com
Subject: Go 1.25.6 and Go 1.24.12 are released with 6 CVE fixes
https://groups.google.com/g/golang-announce/c/Vd2tYVM8eUc announces:
> Hello gophers,
>
> We have just released Go versions 1.25.6 and 1.24.12, minor point releases.
>
> These releases include 6 security fixes following the security policy:
>
> - archive/zip: denial of service when parsing arbitrary ZIP archives
>
> archive/zip used a super-linear file name indexing algorithm that is invoked
> the first time a file in an archive is opened. This can lead to a denial of
> service when consuming a maliciously constructed ZIP archive.
>
> Thanks to Thanks to Jakub Ciolek for reporting this issue.
>
> This is CVE-2025-61728 and Go issue https://go.dev/issue/77102.
>
> - net/http: memory exhaustion in Request.ParseForm
>
> When parsing a URL-encoded form net/http may allocate an unexpected amount of
> memory when provided a large number of key-value pairs. This can result in a
> denial of service due to memory exhaustion.
>
> Thanks to jub0bs for reporting this issue.
>
> This is CVE-2025-61726 and Go issue https://go.dev/issue/77101.
>
> - crypto/tls: Config.Clone copies automatically generated session ticket keys,
> session resumption does not account for the expiration of full certificate
> chain
>
> The Config.Clone methods allows cloning a Config which has already been
> passed to a TLS function, allowing it to be mutated and reused.
>
> If Config.SessionTicketKey has not been set, and Config.SetSessionTicketKeys
> has not been called, crypto/tls will generate random session ticket keys and
> automatically rotate them. Config.Clone would copy these automatically
> generated keys into the returned Config, meaning that the two Configs would
> share session ticket keys, allowing sessions created using one Config could
> be used to resume sessions with the other Config. This can allow clients to
> resume sessions even though the Config may be configured such that they
> should not be able to do so.
>
> Config.Clone no longer copies the automatically generated session ticket
> keys.
> Config.Clone still copies keys which are explicitly provided, either by
> setting Config.SessionTicketKey or by calling Config.SetSessionTicketKeys.
>
> This issue was discoverd by the Go Security team while investigating another
> issue reported by Coia Prant (github.com/rbqvq).
>
> Additionally, on the server side only the expiration of the leaf certificate,
> if one was provided during the initial handshake, was checked when
> considering if a session could be resumed. This allowed sessions to be
> resumed if an intermediate or root certificate in the chain had expired.
>
> Session resumption now takes into account of the full chain when determining
> if the session can be resumed.
>
> Thanks to Coia Prant (github.com/rbqvq) for reporting this issue.
>
> This is CVE-2025-68121 and Go issue https://go.dev/issue/77113.
>
> - cmd/go: bypass of flag sanitization can lead to arbitrary code execution
>
> Usage of 'CgoPkgConfig' allowed execution of the pkg-config
> binary with flags that are not explicitly safe-listed.
>
> To prevent this behavior, compiler flags resulting from usage
> of 'CgoPkgConfig' are sanitized prior to invoking pkg-config.
>
> Thank you to RyotaK (https://ryotak.net) of GMO Flatt Security Inc.
> for reporting this issue.
>
> This is CVE-2025-61731 and go.dev/issue/77100.
>
> - cmd/go: unexpected code execution when invoking toolchain
>
> The Go toolchain supports multiple VCS which are used retrieving modules and
> embedding build information into binaries.
>
> On systems with Mercurial installed (hg) downloading modules (e.g. via go get
> or go mod download) from non-standard sources (e.g. custom domains) can cause
> unexpected code execution due to how external VCS commands are constructed.
>
> On systems with Git installed, downloading and building modules with
> malicious version strings could allow an attacker to write to arbitrary
> files on the system the user has access to. This can only be triggered by
> explicitly providing the malicious version strings to the toolchain, and
> does not affect usage of @latest or bare module paths.
>
> The toolchain now uses safer VCS options to prevent misinterpretation of
> untrusted inputs. In addition, the toolchain now disallows module version
> strings prefixed with a "-" or "/" character.
>
> Thanks to splitline (@splitline) from DEVCORE Research Team for reporting
> this issue.
>
> This is CVE-2025-68119 and Go issue https://go.dev/issue/77099.
>
> - crypto/tls: handshake messages may be processed at the incorrect encryption
> level
>
> During the TLS 1.3 handshake if multiple messages are sent in records that
> span encryption level boundaries (for instance the Client Hello and Encrypted
> Extensions messages), the subsequent messages may be processed before the
> encryption level changes. This can cause some minor information disclosure
> if a network-local attacker can inject messages during the handshake.
>
> Thanks to Coia Prant (github.com/rbqvq) for reporting this issue.
>
> This is CVE-2025-61730 and Go issue https://go.dev/issue/76443
>
> View the release notes for more information:
> https://go.dev/doc/devel/release#go1.25.6
>
> 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 go1.25.6 and build as usual.
>
> Thanks to everyone who contributed to the releases.
>
> Cheers,
> The Go team
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