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Fencer Intel
high 7.5

CVE-2022-40468 json

Potential leak of left-over heap data if custom error page templates containing special non-standard variables are used.

published 2022-09-19 4 y ago modified 2026-06-17 4 mo ago also EUVD-2022-43746

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.9%
EPSS 1.9% chance of exploitation in 30 days, percentile 79%
public exploits
0
none known

Summary

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.

Patch / fix

  • tinyproxy Debian 14, Debian 13, Debian 12 1.11.1-2

debian advisories DEBIAN-CVE-2022-40468

  • tinyproxy Ubuntu 20.04 LTS 1.10.0-4ubuntu0.1
  • tinyproxy Ubuntu Pro 14.04 LTS 1.8.3-3ubuntu14.04.1~esm2
  • tinyproxy Ubuntu Pro 16.04 LTS 1.8.3-3ubuntu16.04.1~esm2
  • tinyproxy Ubuntu Pro 18.04 LTS 1.8.4-5ubuntu0.1~esm2
  • tinyproxy Ubuntu Pro 22.04 LTS 1.11.0-1ubuntu0.1~esm1

ubuntu advisories UBUNTU-CVE-2022-40468

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • tinyproxy openSUSE Tumbleweed 1.11.1-2.1
  • tinyproxy Package Hub 15 SP5, openSUSE Leap 15.5 1.11.2-bp155.3.3.1

opensuse advisories openSUSE-SU-2024:12351-1openSUSE-SU-2024:0119-1

  • tinyproxy Alpine 3.24, Alpine 3.23, Alpine 3.22 +6 more 1.11.1-r2

alpine advisories ALPINE-CVE-2022-40468

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Exploit prediction

1.90% chance of exploitation in the next 30 days, higher than 79% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • github.com https://github.com/tinyproxy/tinyproxy/blob/84f203fb1c4733608c7283bbe794005a469c4b00/src/reqs.c#L346 referenced PoC, tagged "exploit" by a source, unverified
  • github.com https://github.com/tinyproxy/tinyproxy/issues/457 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Classification

Weakness
  • CWE-1188 Initialization of a Resource with an Insecure Default

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.