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Bug 882393 (CVE-2022-4087) - <sys-firmware/ipxe-1.21.1_p20230601: padding oracle attack vulnerability
Summary: <sys-firmware/ipxe-1.21.1_p20230601: padding oracle attack vulnerability
Status: IN_PROGRESS
Alias: CVE-2022-4087
Product: Gentoo Security
Classification: Unclassified
Component: Vulnerabilities (show other bugs)
Hardware: All Linux
: Normal minor
Assignee: Gentoo Security
URL:
Whiteboard: B4 [glsa? cleanup]
Keywords:
Depends on:
Blocks:
 
Reported: 2022-11-21 16:58 UTC by John Helmert III
Modified: 2023-06-27 04:07 UTC (History)
2 users (show)

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


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Description John Helmert III archtester Gentoo Infrastructure gentoo-dev Security 2022-11-21 16:58:20 UTC
CVE-2022-4087:

A vulnerability was found in iPXE. It has been declared as problematic. This vulnerability affects the function tls_new_ciphertext of the file src/net/tls.c of the component TLS. The manipulation of the argument pad_len leads to information exposure through discrepancy. The name of the patch is 186306d6199096b7a7c4b4574d4be8cdb8426729. It is recommended to apply a patch to fix this issue. VDB-214054 is the identifier assigned to this vulnerability.

Patch (unreleased): https://github.com/ipxe/ipxe/commit/186306d6199096b7a7c4b4574d4be8cdb8426729
Comment 1 Matthias Maier gentoo-dev 2023-06-18 02:56:33 UTC
Version 1.21.1 that we have in tree was released in December 2020. The function in question, tls_new_ciphertext(), does not even contain the "if ( is_block_cipher ( ... ) ) { ... }" code block...

I am contemplating to simply bump the ebuild to a current snapshot of the github repository. It has seen some activity lately.
Comment 2 Larry the Git Cow gentoo-dev 2023-06-18 03:47:13 UTC
The bug has been referenced in the following commit(s):

https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=1112a96564118f3449b46e3d02e47e33663b7587

commit 1112a96564118f3449b46e3d02e47e33663b7587
Author:     Matthias Maier <tamiko@gentoo.org>
AuthorDate: 2023-06-18 03:31:14 +0000
Commit:     Matthias Maier <tamiko@gentoo.org>
CommitDate: 2023-06-18 03:46:07 +0000

    sys-firmware/ipxe: add 1.21.1_p20230601
    
     - update to a git snapshot from early 2023-06-01
    
     - add efi32 and efi64 use flags for compiling/installing 32bit and
       64bit variants of the ipxe.efi binary
    
    Bug: https://bugs.gentoo.org/882393
    Bug: https://bugs.gentoo.org/888827
    Signed-off-by: Matthias Maier <tamiko@gentoo.org>

 sys-firmware/ipxe/Manifest                     |   2 +
 sys-firmware/ipxe/ipxe-1.21.1_p20230601.ebuild | 127 +++++++++++++++++++++++++
 sys-firmware/ipxe/metadata.xml                 |   3 +-
 3 files changed, 131 insertions(+), 1 deletion(-)
Comment 3 John Helmert III archtester Gentoo Infrastructure gentoo-dev Security 2023-06-19 03:07:03 UTC
Thanks! Let's stable when ready.
Comment 4 Florian Schmaus gentoo-dev 2023-06-24 09:22:56 UTC
(In reply to John Helmert III from comment #3)
> Thanks! Let's stable when ready.

FWIW, ipxe 1.21.1_p20230601 was added as stable (not sure if intentional or not).
Comment 5 John Helmert III archtester Gentoo Infrastructure gentoo-dev Security 2023-06-27 04:07:11 UTC
Thanks, missed that