OPENSUSE-SU-2026:11851-1

Vulnerability from csaf_opensuse - Published: 2026-09-22 00:00 - Updated: 2026-09-23 08:33
Summary
python313-asyncssh-2.24.0-1.1 on GA media
Severity
Moderate
Notes
Title of the patch: python313-asyncssh-2.24.0-1.1 on GA media
Description of the patch: These are all security issues fixed in the python313-asyncssh-2.24.0-1.1 package on the GA media of openSUSE Tumbleweed.
Patchnames: openSUSE-Tumbleweed-2026-11851
Terms of use: CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).
CVE-2023-46445
5.9 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Affected products
Product Identifier Version Remediation
Unresolved product id: openSUSE Tumbleweed:python313-asyncssh-0:2.24.0-1.1.aarch64 —
Vendor Fix
Unresolved product id: openSUSE Tumbleweed:python313-asyncssh-0:2.24.0-1.1.ppc64le —
Vendor Fix
Unresolved product id: openSUSE Tumbleweed:python313-asyncssh-0:2.24.0-1.1.s390x —
Vendor Fix
Unresolved product id: openSUSE Tumbleweed:python313-asyncssh-0:2.24.0-1.1.x86_64 —
Vendor Fix
Unresolved product id: openSUSE Tumbleweed:python314-asyncssh-0:2.24.0-1.1.aarch64 —
Vendor Fix
Unresolved product id: openSUSE Tumbleweed:python314-asyncssh-0:2.24.0-1.1.ppc64le —
Vendor Fix
Unresolved product id: openSUSE Tumbleweed:python314-asyncssh-0:2.24.0-1.1.s390x —
Vendor Fix
Unresolved product id: openSUSE Tumbleweed:python314-asyncssh-0:2.24.0-1.1.x86_64 —
Vendor Fix
Threats
Impact moderate
CVE-2023-48795
5.9 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Affected products
Recommended 8 products, the same list as for CVE-2023-46445
Threats
Impact important
CVE-2026-62949
Affected products
Recommended 8 products, the same list as for CVE-2023-46445
Threats
Impact moderate
References
To clipboard 

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          "text": "The SSH transport protocol with certain OpenSSH extensions, found in OpenSSH before 9.6 and other products, allows remote attackers to bypass integrity checks such that some packets are omitted (from the extension negotiation message), and a client and server may consequently end up with a connection for which some security features have been downgraded or disabled, aka a Terrapin attack. This occurs because the SSH Binary Packet Protocol (BPP), implemented by these extensions, mishandles the handshake phase and mishandles use of sequence numbers. For example, there is an effective attack against SSH\u0027s use of ChaCha20-Poly1305 (and CBC with Encrypt-then-MAC). The bypass occurs in chacha20-poly1305@openssh.com and (if CBC is used) the -etm@openssh.com MAC algorithms. This also affects Maverick Synergy Java SSH API before 3.1.0-SNAPSHOT, Dropbear through 2022.83, Ssh before 5.1.1 in Erlang/OTP, PuTTY before 0.80, AsyncSSH before 2.14.2, golang.org/x/crypto before 0.17.0, libssh before 0.10.6, libssh2 through 1.11.0, Thorn Tech SFTP Gateway before 3.4.6, Tera Term before 5.1, Paramiko before 3.4.0, jsch before 0.2.15, SFTPGo before 2.5.6, Netgate pfSense Plus through 23.09.1, Netgate pfSense CE through 2.7.2, HPN-SSH through 18.2.0, ProFTPD before 1.3.8b (and before 1.3.9rc2), ORYX CycloneSSH before 2.3.4, NetSarang XShell 7 before Build 0144, CrushFTP before 10.6.0, ConnectBot SSH library before 2.2.22, Apache MINA sshd through 2.11.0, sshj through 0.37.0, TinySSH through 20230101, trilead-ssh2 6401, LANCOM LCOS and LANconfig, FileZilla before 3.66.4, Nova before 11.8, PKIX-SSH before 14.4, SecureCRT before 9.4.3, Transmit5 before 5.10.4, Win32-OpenSSH before 9.5.0.0p1-Beta, WinSCP before 6.2.2, Bitvise SSH Server before 9.32, Bitvise SSH Client before 9.33, KiTTY through 0.76.1.13, the net-ssh gem 7.2.0 for Ruby, the mscdex ssh2 module before 1.15.0 for Node.js, the thrussh library before 0.35.1 for Rust, and the Russh crate before 0.40.2 for Rust.",
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            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N",
            "version": "3.1"
          },
          "products": [
            "openSUSE Tumbleweed:python313-asyncssh-0:2.24.0-1.1.aarch64",
            "openSUSE Tumbleweed:python313-asyncssh-0:2.24.0-1.1.ppc64le",
            "openSUSE Tumbleweed:python313-asyncssh-0:2.24.0-1.1.s390x",
            "openSUSE Tumbleweed:python313-asyncssh-0:2.24.0-1.1.x86_64",
            "openSUSE Tumbleweed:python314-asyncssh-0:2.24.0-1.1.aarch64",
            "openSUSE Tumbleweed:python314-asyncssh-0:2.24.0-1.1.ppc64le",
            "openSUSE Tumbleweed:python314-asyncssh-0:2.24.0-1.1.s390x",
            "openSUSE Tumbleweed:python314-asyncssh-0:2.24.0-1.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2026-09-22T00:00:00Z",
          "details": "important"
        }
      ],
      "title": "CVE-2023-48795"
    },
    {
      "cve": "CVE-2026-62949",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2026-62949"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "AsyncSSH is a Python package which provides an asynchronous client and server implementation of the SSHv2 protocol on top of the Python asyncio framework. Prior to 2.24.0, _process_channel_open and _process_channel_open_confirmation in asyncssh/connection.py accept a peer-supplied send_pktsize value of zero. When channel data reaches SSHChannel._flush_send_buf in asyncssh/channel.py, the zero value causes each loop iteration to slice and remove zero bytes without reducing the send window, leaving the synchronous loop permanently true with no await point. A malicious SSH server can trigger the client path through SSH_MSG_CHANNEL_OPEN_CONFIRMATION before the first channel write, while an authenticated client can trigger the server path through SSH_MSG_CHANNEL_OPEN and freeze every current and future connection handled by the process. This vulnerability is fixed in 2.24.0.",
          "title": "CVE description"
        }
      ],
      "product_status": {
        "recommended": [
          "openSUSE Tumbleweed:python313-asyncssh-0:2.24.0-1.1.aarch64",
          "openSUSE Tumbleweed:python313-asyncssh-0:2.24.0-1.1.ppc64le",
          "openSUSE Tumbleweed:python313-asyncssh-0:2.24.0-1.1.s390x",
          "openSUSE Tumbleweed:python313-asyncssh-0:2.24.0-1.1.x86_64",
          "openSUSE Tumbleweed:python314-asyncssh-0:2.24.0-1.1.aarch64",
          "openSUSE Tumbleweed:python314-asyncssh-0:2.24.0-1.1.ppc64le",
          "openSUSE Tumbleweed:python314-asyncssh-0:2.24.0-1.1.s390x",
          "openSUSE Tumbleweed:python314-asyncssh-0:2.24.0-1.1.x86_64"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2026-62949",
          "url": "https://www.suse.com/security/cve/CVE-2026-62949"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1280972 for CVE-2026-62949",
          "url": "https://bugzilla.suse.com/1280972"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
            "openSUSE Tumbleweed:python313-asyncssh-0:2.24.0-1.1.aarch64",
            "openSUSE Tumbleweed:python313-asyncssh-0:2.24.0-1.1.ppc64le",
            "openSUSE Tumbleweed:python313-asyncssh-0:2.24.0-1.1.s390x",
            "openSUSE Tumbleweed:python313-asyncssh-0:2.24.0-1.1.x86_64",
            "openSUSE Tumbleweed:python314-asyncssh-0:2.24.0-1.1.aarch64",
            "openSUSE Tumbleweed:python314-asyncssh-0:2.24.0-1.1.ppc64le",
            "openSUSE Tumbleweed:python314-asyncssh-0:2.24.0-1.1.s390x",
            "openSUSE Tumbleweed:python314-asyncssh-0:2.24.0-1.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2026-09-22T00:00:00Z",
          "details": "moderate"
        }
      ],
      "title": "CVE-2026-62949"
    }
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.