Potential leak of left-over heap data if custom error page templates containing special non-standard variables are used. Tinyproxy commit 84f203f and earlier use uninitialized buffers in process_request() function.

The remote Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-7140-1 advisory.

    It was discovered that Tinyproxy did not properly manage memory under certain circumstances. An attacker     could possibly use this issue to leak left-over heap data if custom error page templates containing     special non-standard variables are used.

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

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

The remote Debian 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-3892 advisory.

    - -------------------------------------------------------------------------     Debian LTS Advisory DLA-3892-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/                    Thorsten Alteholz     September 18, 2024                            https://wiki.debian.org/LTS
    - -------------------------------------------------------------------------

    Package        : tinyproxy     Version        : 1.10.0-5+deb11u1     CVE ID         : CVE-2022-40468 CVE-2023-49606


    Two issues have been found in tinyproxy, a lightweight, non-caching,     optionally anonymizing HTTP proxy.
    They are related to an use after free in header parsing of GTTP     connections and a potential leak of left-over heap data.



    For Debian 11 bullseye, these problems have been fixed in version     1.10.0-5+deb11u1.

    We recommend that you upgrade your tinyproxy packages.

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

    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

Tenable has extracted the preceding description block directly from the Debian 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 openSUSE 15 host has a package installed that is affected by multiple vulnerabilities as referenced in the openSUSE-SU-2024:0119-1 advisory.

  - Tinyproxy 1.8.3 and earlier allows remote attackers to cause a denial of service (CPU and memory     consumption) via (1) a large number of headers or (2) a large number of forged headers that trigger hash     collisions predictably. bucket. (CVE-2012-3505)

  - main.c in Tinyproxy 1.8.4 and earlier creates a /run/tinyproxy/tinyproxy.pid file after dropping     privileges to a non-root account, which might allow local users to kill arbitrary processes by leveraging     access to this non-root account for tinyproxy.pid modification before a root script executes a kill `cat     /run/tinyproxy/tinyproxy.pid` command. (CVE-2017-11747)

  - Potential leak of left-over heap data if custom error page templates containing special non-standard     variables are used. Tinyproxy commit 84f203f and earlier use uninitialized buffers in process_request()     function. (CVE-2022-40468)

  - Rejected reason: This CVE ID is a duplicate of CVE-2022-40468 (CVE-2023-40533)

  - A use-after-free vulnerability exists in the HTTP Connection Headers parsing in Tinyproxy 1.11.1 and     Tinyproxy 1.10.0. A specially crafted HTTP header can trigger reuse of previously freed memory, which     leads to memory corruption and could lead to remote code execution. An attacker needs to make an     unauthenticated HTTP request to trigger this vulnerability. (CVE-2023-49606)

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-202305-27 (Tinyproxy: Memory Disclosure)

  - Potential leak of left-over heap data if custom error page templates containing special non-standard     variables are used. Tinyproxy commit 84f203f and earlier use uninitialized buffers in process_request()     function. (CVE-2022-40468)

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

ID	Name	Product	Family	Severity
212175	Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS : Tinyproxy vulnerability (USN-7140-1)	Nessus	Ubuntu Local Security Checks	high
207396	Debian dla-3892 : tinyproxy - security update	Nessus	Debian Local Security Checks	critical
195342	openSUSE 15 Security Update : tinyproxy (openSUSE-SU-2024:0119-1)	Nessus	SuSE Local Security Checks	critical
176191	GLSA-202305-27 : Tinyproxy: Memory Disclosure	Nessus	Gentoo Local Security Checks	high

Detections

Analytics

CVE-2022-40468

high

Tenable Plugins

high

critical

critical

high