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Bug 903979 (CVE-2023-24534, CVE-2023-24536, CVE-2023-24537, CVE-2023-24538) - <dev-lang/go-{1.19.8, 1.20.3}: Multiple vulnerabilities
Summary: <dev-lang/go-{1.19.8, 1.20.3}: Multiple vulnerabilities
Alias: CVE-2023-24534, CVE-2023-24536, CVE-2023-24537, CVE-2023-24538
Product: Gentoo Security
Classification: Unclassified
Component: Vulnerabilities (show other bugs)
Hardware: All Linux
: Normal normal (vote)
Assignee: Gentoo Security
Whiteboard: A3 [glsa+]
Depends on: 903986
  Show dependency tree
Reported: 2023-04-07 12:45 UTC by Sam James
Modified: 2023-11-25 08:59 UTC (History)
1 user (show)

See Also:
Package list:
Runtime testing required: ---


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Description Sam James archtester Gentoo Infrastructure gentoo-dev Security 2023-04-07 12:45:04 UTC
go/parser: infinite loop in parsing

    Calling any of the Parse functions on Go source code which contains //line directives with very large line numbers can cause an infinite loop due to integer overflow.

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

    This is CVE-2023-24537 and Go issue

    html/template: backticks not treated as string delimiters

    Templates did not properly consider backticks (`) as Javascript string delimiters, and as such did
    not escape them as expected. Backticks are used, since ES6, for JS template literals. If a template
    contained a Go template action within a Javascript template literal, the contents of the action could
    be used to terminate the literal, injecting arbitrary Javascript code into the Go template.

    As ES6 template literals are rather complex, and themselves can do string interpolation, we've decided
    to simply disallow Go template actions from being used inside of them (e.g. "var a = {{.}}"), since
    there is no obviously safe way to allow this behavior. This takes the same approach as
    Template.Parse will now return an Error when it encounters templates like this, with a currently unexported
    ErrorCode with a value of 12. This ErrorCode will be exported in the next major release.

    Users who rely on this behavior can re-enable it using the GODEBUG flag jstmpllitinterp=1, with the
    caveat that backticks will now be escaped. This should be used with caution.

    Thanks to Sohom Datta, Manipal Institute of Technology, for reporting this issue.

    This is CVE-2023-24538 and Go issue

    net/http, net/textproto: denial of service from excessive memory allocation

    HTTP and MIME header parsing could allocate large amounts of memory, even when parsing small inputs.

    Certain unusual patterns of input data could cause the common function used to parse HTTP and MIME headers to allocate substantially more memory than required to hold the parsed headers. An attacker can exploit this behavior to cause an HTTP server to allocate large amounts of memory from a small request, potentially leading to memory exhaustion and a denial of service.

    Header parsing now correctly allocates only the memory required to hold parsed headers.

    Thanks to Jakob Ackermann (@das7pad) for discovering this issue.

    This is CVE-2023-24534 and Go issue

    net/http, net/textproto, mime/multipart: denial of service from excessive resource consumption

    Multipart form parsing can consume large amounts of CPU and memory when processing form inputs containing very large numbers of parts. This stems from several causes:

    mime/multipart.Reader.ReadForm limits the total memory a parsed multipart form can consume. ReadForm could undercount the amount of memory consumed, leading it to accept larger inputs than intended.
    Limiting total memory does not account for increased pressure on the garbage collector from large numbers of small allocations in forms with many parts.
    ReadForm could allocate a large number of short-lived buffers, further increasing pressure on the garbage collector.
    The combination of these factors can permit an attacker to cause an program that parses multipart forms to consume large amounts of CPU and memory, potentially resulting in a denial of service. This affects programs that use mime/multipart.Reader.ReadForm, as well as form parsing in the net/http package with the Request methods FormFile, FormValue, ParseMultipartForm, and PostFormValue.

    ReadForm now does a better job of estimating the memory consumption of parsed forms, and performs many fewer short-lived allocations.

    In addition, mime/multipart.Reader now imposes the following limits on the size of parsed forms:

    Forms parsed with ReadForm may contain no more than 1000 parts. This limit may be adjusted with the environment variable GODEBUG=multipartmaxparts=.
    Form parts parsed with NextPart and NextRawPart may contain no more than 10,000 header fields. In addition, forms parsed with ReadForm may contain no more than 10,000 header fields across all parts. This limit may be adjusted with the environment variable GODEBUG=multipartmaxheaders=.
    Thanks to Jakob Ackermann (@das7pad) for discovering this issue.

    This is CVE-2023-24536 and Go issue
Comment 1 Sam James archtester Gentoo Infrastructure gentoo-dev Security 2023-04-07 12:45:16 UTC
Please stable when ready, thanks.
Comment 2 Hans de Graaff gentoo-dev Security 2023-10-08 10:54:17 UTC
commit 93caf41f6f9cd137500106722ad398e62c4204d4
Author: William Hubbs <>
Date:   Fri Apr 14 11:03:50 2023 -0500

    dev-lang/go: drop 1.19.7, 1.20.2
Comment 3 Larry the Git Cow gentoo-dev 2023-11-25 08:57:31 UTC
The bug has been referenced in the following commit(s):

commit 7f1e599c82e7f7f6b21bf1127d01d7dfa903e21c
Author:     GLSAMaker <>
AuthorDate: 2023-11-25 08:56:49 +0000
Commit:     Hans de Graaff <>
CommitDate: 2023-11-25 08:57:21 +0000

    [ GLSA 202311-09 ] Go: Multiple Vulnerabilities
    Signed-off-by: GLSAMaker <>
    Signed-off-by: Hans de Graaff <>

 glsa-202311-09.xml | 73 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 73 insertions(+)