An issue was found in CPython 3.12.0 `subprocess` module on POSIX platforms. The issue was fixed in CPython 3.12.1 and does not affect other stable releases. When using the `extra_groups=` parameter with an empty list as a value (ie `extra_groups=[]`) the logic regressed to not call `setgroups(0, NULL)` before calling `exec()`, thus not dropping the original processes' groups before starting the new process. There is no issue when the parameter isn't used or when any value is used besides an empty list. This issue only impacts CPython processes run with sufficient privilege to make the `setgroups` system call (typically `root`).

The remote Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 23.10 host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-6891-1 advisory.

    It was discovered that Python incorrectly handled certain inputs. An attacker could possibly use this     issue to execute arbitrary code. This issue only affected Ubuntu 14.04 LTS and Ubuntu 18.04 LTS.
    (CVE-2015-20107)

    It was discovered that Python incorrectly used regular expressions vulnerable to catastrophic     backtracking. A remote attacker could possibly use this issue to cause a denial of service. This issue     only affected Ubuntu 14.04 LTS. (CVE-2018-1060, CVE-2018-1061)

    It was discovered that Python failed to initialize Expats hash salt. A remote attacker could possibly     use this issue to cause hash collisions, leading to a denial of service. This issue only affected Ubuntu     14.04 LTS. (CVE-2018-14647)

    It was discovered that Python incorrectly handled certain pickle files. An attacker could possibly use     this issue to consume memory, leading to a denial of service. This issue only affected Ubuntu 14.04 LTS.
    (CVE-2018-20406)

    It was discovered that Python incorrectly validated the domain when handling cookies. An attacker could     possibly trick Python into sending cookies to the wrong domain. This issue only affected Ubuntu 14.04 LTS.
    (CVE-2018-20852)

    Jonathan Birch and Panayiotis Panayiotou discovered that Python incorrectly handled Unicode encoding     during NFKC normalization. An attacker could possibly use this issue to obtain sensitive information. This     issue only affected Ubuntu 14.04 LTS. (CVE-2019-9636, CVE-2019-10160)

    It was discovered that Python incorrectly parsed certain email addresses. A remote attacker could possibly     use this issue to trick Python applications into accepting email addresses that should be denied. This     issue only affected Ubuntu 14.04 LTS. (CVE-2019-16056)

    It was discovered that the Python documentation XML-RPC server incorrectly handled certain fields. A     remote attacker could use this issue to execute a cross-site scripting (XSS) attack. This issue only     affected Ubuntu 14.04 LTS. (CVE-2019-16935)

    It was discovered that Python documentation had a misleading information. A security issue could be     possibly caused by wrong assumptions of this information. This issue only affected Ubuntu 14.04 LTS and     Ubuntu 18.04 LTS. (CVE-2019-17514)

    It was discovered that Python incorrectly stripped certain characters from requests. A remote attacker     could use this issue to perform CRLF injection. This issue only affected Ubuntu 14.04 LTS and Ubuntu 18.04     LTS. (CVE-2019-18348)

    It was discovered that Python incorrectly handled certain TAR archives. An attacker could possibly use     this issue to cause a denial of service. This issue only affected Ubuntu 14.04 LTS and Ubuntu 18.04 LTS.
    (CVE-2019-20907)

    Colin Read and Nicolas Edet discovered that Python incorrectly handled parsing certain X509 certificates.
    An attacker could possibly use this issue to cause Python to crash, resulting in a denial of service. This     issue only affected Ubuntu 14.04 LTS. (CVE-2019-5010)

    It was discovered that incorrectly handled certain ZIP files. An attacker could possibly use this issue to     cause a denial of service. This issue only affected Ubuntu 14.04 LTS. (CVE-2019-9674)

    It was discovered that Python incorrectly handled certain urls. A remote attacker could possibly use this     issue to perform CRLF injection attacks. This issue only affected Ubuntu 14.04 LTS. (CVE-2019-9740,     CVE-2019-9947)

    Sihoon Lee discovered that Python incorrectly handled the local_file: scheme. A remote attacker could     possibly use this issue to bypass blocklist meschanisms. This issue only affected Ubuntu 14.04 LTS.
    (CVE-2019-9948)

    It was discovered that Python incorrectly handled certain IP values. An attacker could possibly use this     issue to cause a denial of service. This issue only affected Ubuntu 14.04 LTS and Ubuntu 18.04 LTS.
    (CVE-2020-14422)

    It was discovered that Python incorrectly handled certain character sequences. A remote attacker could     possibly use this issue to perform CRLF injection. This issue only affected Ubuntu 14.04 LTS and Ubuntu     18.04 LTS. (CVE-2020-26116)

    It was discovered that Python incorrectly handled certain inputs. An attacker could possibly use this     issue to execute arbitrary code or cause a denial of service. This issue only affected Ubuntu 14.04 LTS.
    (CVE-2020-27619, CVE-2021-3177)

    It was discovered that Python incorrectly handled certain HTTP requests. An attacker could possibly use     this issue to cause a denial of service. This issue only affected Ubuntu 14.04 LTS. (CVE-2020-8492)

    It was discovered that the Python stdlib ipaddress API incorrectly handled octal strings. A remote     attacker could possibly use this issue to perform a wide variety of attacks, including bypassing certain     access restrictions. This issue only affected Ubuntu 18.04 LTS. (CVE-2021-29921)

    David Schwrer discovered that Python incorrectly handled certain inputs. An attacker could possibly use     this issue to expose sensitive information. This issue only affected Ubuntu 18.04 LTS. (CVE-2021-3426)

    It was discovered that Python incorrectly handled certain RFCs. An attacker could possibly use this issue     to cause a denial of service. This issue only affected Ubuntu 14.04 LTS. (CVE-2021-3733)

    It was discovered that Python incorrectly handled certain server responses. An attacker could possibly use     this issue to cause a denial of service. This issue only affected Ubuntu 14.04 LTS. (CVE-2021-3737)

    It was discovered that Python incorrectly handled certain FTP requests. An attacker could possibly use     this issue to expose sensitive information. This issue only affected Ubuntu 14.04 LTS and Ubuntu 18.04     LTS. (CVE-2021-4189)

    It was discovered that Python incorrectly handled certain inputs. An attacker could possibly use this     issue to execute arbitrary code. This issue only affected Ubuntu 14.04 LTS and Ubuntu 18.04 LTS.
    (CVE-2022-0391)

    Devin Jeanpierre discovered that Python incorrectly handled sockets when the multiprocessing module was     being used. A local attacker could possibly use this issue to execute arbitrary code and escalate     privileges. This issue only affected Ubuntu 22.04 LTS. (CVE-2022-42919)

    It was discovered that Python incorrectly handled certain inputs. If a user or an automated system were     tricked into running a specially crafted input, a remote attacker could possibly use this issue to cause a     denial of service. This issue only affected Ubuntu 14.04 LTS, Ubuntu 18.04 LTS and Ubuntu 22.04 LTS.
    (CVE-2022-45061, CVE-2023-24329)

    It was discovered that Python incorrectly handled certain scripts. An attacker could possibly use this     issue to execute arbitrary code or cause a crash. This issue only affected Ubuntu 14.04 LTS and Ubuntu     18.04 LTS. (CVE-2022-48560)

    It was discovered that Python incorrectly handled certain plist files. If a user or an automated system     were tricked into processing a specially crafted plist file, an attacker could possibly use this issue to     consume resources, resulting in a denial of service. This issue only affected Ubuntu 14.04 LTS and Ubuntu     18.04 LTS. (CVE-2022-48564)

    It was discovered that Python did not properly handle XML entity declarations in plist files. An attacker     could possibly use this vulnerability to perform an XML External Entity (XXE) injection, resulting in a     denial of service or information disclosure. This issue only affected Ubuntu 14.04 LTS and Ubuntu 18.04     LTS. (CVE-2022-48565)

    It was discovered that Python did not properly provide constant-time processing for a crypto operation. An     attacker could possibly use this issue to perform a timing attack and recover sensitive information. This     issue only affected Ubuntu 14.04 LTS and Ubuntu 18.04 LTS. (CVE-2022-48566)

    It was discovered that Python instances of ssl.SSLSocket were vulnerable to a bypass of the TLS handshake.
    An attacker could possibly use this issue to cause applications to treat unauthenticated received data     before TLS handshake as authenticated data after TLS handshake. This issue only affected Ubuntu 14.04 LTS,     Ubuntu 18.04 LTS, Ubuntu 20.04 LTS and Ubuntu 22.04 LTS. (CVE-2023-40217)

    It was discovered that Python incorrectly handled null bytes when normalizing pathnames. An attacker could     possibly use this issue to bypass certain filename checks. This issue only affected Ubuntu 22.04 LTS.
    (CVE-2023-41105)

    It was discovered that Python incorrectly handled privilege with certain parameters. An attacker could     possibly use this issue to maintain the original processes' groups before starting the new process. This     issue only affected Ubuntu 23.10. (CVE-2023-6507)

    It was discovered that Python incorrectly handled symlinks in temp files. An attacker could possibly use     this issue to modify the permissions of files. This issue only affected Ubuntu 18.04 LTS, Ubuntu 20.04     LTS, Ubuntu 22.04 LTS and Ubuntu 23.10. (CVE-2023-6597)

    It was discovered that Python incorrectly handled certain crafted zip files. An attacker could possibly     use this issue to crash the program, resulting in a denial of service. (CVE-2024-0450)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote host is affected by the vulnerability described in GLSA-202405-01 (Python, PyPy3: Multiple Vulnerabilities)

  - An issue was found in CPython 3.12.0 `subprocess` module on POSIX platforms. The issue was fixed in     CPython 3.12.1 and does not affect other stable releases. When using the `extra_groups=` parameter with an     empty list as a value (ie `extra_groups=[]`) the logic regressed to not call `setgroups(0, NULL)` before     calling `exec()`, thus not dropping the original processes' groups before starting the new process. There     is no issue when the parameter isn't used or when any value is used besides an empty list. This issue only     impacts CPython processes run with sufficient privilege to make the `setgroups` system call (typically     `root`). (CVE-2023-6507)

  - An issue was found in the CPython `tempfile.TemporaryDirectory` class affecting versions 3.12.1, 3.11.7,     3.10.13, 3.9.18, and 3.8.18 and prior. The tempfile.TemporaryDirectory class would dereference symlinks     during cleanup of permissions-related errors. This means users which can run privileged programs are     potentially able to modify permissions of files referenced by symlinks in some circumstances.
    (CVE-2023-6597)

  - An issue in the urllib.parse component of Python before 3.11.4 allows attackers to bypass blocklisting     methods by supplying a URL that starts with blank characters. (CVE-2023-24329)

  - An issue was discovered in Python before 3.8.18, 3.9.x before 3.9.18, 3.10.x before 3.10.13, and 3.11.x     before 3.11.5. It primarily affects servers (such as HTTP servers) that use TLS client authentication. If     a TLS server-side socket is created, receives data into the socket buffer, and then is closed quickly,     there is a brief window where the SSLSocket instance will detect the socket as not connected and won't     initiate a handshake, but buffered data will still be readable from the socket buffer. This data will not     be authenticated if the server-side TLS peer is expecting client certificate authentication, and is     indistinguishable from valid TLS stream data. Data is limited in size to the amount that will fit in the     buffer. (The TLS connection cannot directly be used for data exfiltration because the vulnerable code path     requires that the connection be closed on initialization of the SSLSocket.) (CVE-2023-40217)

  - An issue was discovered in Python 3.11 through 3.11.4. If a path containing '\0' bytes is passed to     os.path.normpath(), the path will be truncated unexpectedly at the first '\0' byte. There are plausible     cases in which an application would have rejected a filename for security reasons in Python 3.10.x or     earlier, but that filename is no longer rejected in Python 3.11.x. (CVE-2023-41105)

  - An issue was found in the CPython `zipfile` module affecting versions 3.12.1, 3.11.7, 3.10.13, 3.9.18, and     3.8.18 and prior. The zipfile module is vulnerable to quoted-overlap zip-bombs which exploit the zip     format to create a zip-bomb with a high compression ratio. The fixed versions of CPython makes the zipfile     module reject zip archives which overlap entries in the archive. (CVE-2024-0450)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
202187	Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 23.10 : Python vulnerabilities (USN-6891-1)	Nessus	Ubuntu Local Security Checks	critical
194974	GLSA-202405-01 : Python, PyPy3: Multiple Vulnerabilities	Nessus	Gentoo Local Security Checks	high

Detections

Analytics

CVE-2023-6507

medium

Tenable Plugins

critical

high