856055 – (CVE-2021-33451, CVE-2021-33453, CVE-2022-33067) app-arch/lrzip: DoS via invalid arithmetic shifts

Bug 856055 (CVE-2021-33451, CVE-2021-33453, CVE-2022-33067) - app-arch/lrzip: DoS via invalid arithmetic shifts

Summary: app-arch/lrzip: DoS via invalid arithmetic shifts

Status:	CONFIRMED

Alias:	CVE-2021-33451, CVE-2021-33453, CVE-2022-33067

Product:	Gentoo Security
Classification:	Unclassified
Component:	Vulnerabilities (show other bugs)
Hardware:	All Linux

Importance:	Normal minor (vote)
Assignee:	Gentoo Security

URL:	https://github.com/ckolivas/lrzip/iss...
Whiteboard:	B3 [upstream]
Keywords:

Depends on:
Blocks:

Reported:	2022-07-03 03:20 UTC by John Helmert III
Modified:	2024-04-03 11:58 UTC (History)
CC List:	2 users (show)

See Also:
Package list:
Runtime testing required:	---

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Description John Helmert III archtester

2022-07-03 03:20:57 UTC

CVE-2022-33067:

Lrzip v0.651 was discovered to contain multiple invalid arithmetic shifts via the functions get_magic in lrzip.c and Predictor::init in libzpaq/libzpaq.cpp. These vulnerabilities allow attackers to cause a Denial of Service via unspecified vectors.

Comment 1 John Helmert III archtester

2022-07-27 04:36:22 UTC

CVE-2021-33451 (https://gist.github.com/Clingto/bb632c0c463f4b2c97e4f65f751c5e6d):
https://github.com/ckolivas/lrzip/issues/198

An issue was discovered in lrzip version 0.641. There are memory leaks in fill_buffer() in stream.c.

CVE-2021-33453 (https://gist.github.com/Clingto/bb632c0c463f4b2c97e4f65f751c5e6d):
https://github.com/ckolivas/lrzip/issues/199

An issue was discovered in lrzip version 0.641. There is a use-after-free in ucompthread() in stream.c:1538.

Seems upstream can't reproduce..