Debian Security Advisory

DLA-2981-1 lrzip -- LTS security update

Date Reported:

13 Apr 2022

Affected Packages:

Vulnerable:

Yes

Security database references:

In the Debian bugtracking system: Bug 888506, Bug 990583.
In Mitre's CVE dictionary: CVE-2018-5786, CVE-2020-25467, CVE-2021-27345, CVE-2021-27347, CVE-2022-26291.

More information:

Several security vulnerabilities have been discovered in lrzip, a compression program. Invalid pointers, use-after-free and infinite loops would allow attackers to cause a denial of service or possibly other unspecified impact via a crafted compressed file.

CVE-2018-5786
There is an infinite loop and application hang in the get_fileinfo function (lrzip.c). Remote attackers could leverage this vulnerability to cause a denial of service via a crafted lrz file.
CVE-2020-25467
A null pointer dereference was discovered lzo_decompress_buf in stream.c which allows an attacker to cause a denial of service (DOS) via a crafted compressed file.
CVE-2021-27345
A null pointer dereference was discovered in ucompthread in stream.c which allows attackers to cause a denial of service (DOS) via a crafted compressed file.
CVE-2021-27347
Use after free in lzma_decompress_buf function in stream.c in allows attackers to cause Denial of Service (DoS) via a crafted compressed file.
CVE-2022-26291
lrzip was discovered to contain a multiple concurrency use-after-free between the functions zpaq_decompress_buf() and clear_rulist(). This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted lrz file.

For Debian 9 stretch, these problems have been fixed in version 0.631-1+deb9u2.

We recommend that you upgrade your lrzip packages.

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

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