Debian alert DLA-2588-1 (zeromq3)

From:
             
 
Anton Gladky <gladk@debian.org>
To:
             
 
debian-lts-announce@lists.debian.org
Subject:
             
 
[SECURITY] [DLA 2588-1] zeromq3 security update
Date:
             
 
Wed, 10 Mar 2021 17:05:27 +0100
Message-ID:
             
 
<20210310160527.B372C4A0180@thinkpad.localdomain>
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512

- -------------------------------------------------------------------------
Debian LTS Advisory DLA-2588-1                debian-lts@lists.debian.org
https://www.debian.org/lts/security/                         Anton Gladky
March 09, 2021                                https://wiki.debian.org/LTS
- -------------------------------------------------------------------------

Package        : zeromq3
Version        : 4.2.1-4+deb9u4
CVE ID         : CVE-2021-20234 CVE-2021-20235

Two security issues have been detected in zeromq3.

CVE-2021-20234

    Memory leak in client induced by malicious server(s) without CURVE/ZAP.

    From issue description [1].
    When a pipe processes a delimiter and is already not in active state but
    still has an unfinished message, the message is leaked.

CVE-2021-20235

    Heap overflow when receiving malformed ZMTP v1 packets.

    From issue description [2].
    The static allocator was implemented to shrink its recorded size similarly
    to the shared allocator. But it does not need to, and it should not,
    because unlike the shared one the static allocator always uses a static
    buffer, with a size defined by the ZMQ_IN_BATCH_SIZE socket option
    (default 8192), so changing the size opens the library to heap overflows.
    The static allocator is used only with ZMTP v1 peers.

[1] https://github.com/zeromq/libzmq/security/advisories/GHSA...
[2] https://github.com/zeromq/libzmq/security/advisories/GHSA...

For Debian 9 stretch, these problems have been fixed in version
4.2.1-4+deb9u4.

We recommend that you upgrade your zeromq3 packages.

For the detailed security status of zeromq3 please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/zeromq3

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS
-----BEGIN PGP SIGNATURE-----
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=zHQ+
-----END PGP SIGNATURE-----