Mageia 2021-0533: busybox security update

Advisories

MGASA-2021-0533 - Updated busybox packages fix security vulnerability

Publication date: 02 Dec 2021
URL: https://advisories.mageia.org/MGASA-2021-0533.html
Type: security
Affected Mageia releases: 8
CVE: CVE-2021-42376,
     CVE-2021-42377,
     CVE-2021-42378,
     CVE-2021-42379,
     CVE-2021-42380,
     CVE-2021-42381,
     CVE-2021-42382,
     CVE-2021-42383,
     CVE-2021-42384,
     CVE-2021-42385,
     CVE-2021-42386

A NULL pointer dereference in Busybox's hush applet leads to denial of
service when processing a crafted shell command, due to missing validation
after a \x03 delimiter character. This may be used for DoS under very rare
conditions of filtered command input. (CVE-2021-42376)

An attacker-controlled pointer free in Busybox's hush applet leads to
denial of service and possible code execution when processing a crafted
shell command, due to the shell mishandling the &&& string. This may be
used for remote code execution under rare conditions of filtered command
input. (CVE-2021-42377)

A use-after-free in Busybox's awk applet leads to denial of service and
possibly code execution when processing a crafted awk pattern in the
getvar_i function. (CVE-2021-42378)

A use-after-free in Busybox's awk applet leads to denial of service and
possibly code execution when processing a crafted awk pattern in the
next_input_file function. (CVE-2021-42379)

A use-after-free in Busybox's awk applet leads to denial of service and
possibly code execution when processing a crafted awk pattern in the
clrvar function. (CVE-2021-42380)

A use-after-free in Busybox's awk applet leads to denial of service and
possibly code execution when processing a crafted awk pattern in the
hash_init function. (CVE-2021-42381)

A use-after-free in Busybox's awk applet leads to denial of service and
possibly code execution when processing a crafted awk pattern in the
getvar_s function. (CVE-2021-42382)

A use-after-free in Busybox's awk applet leads to denial of service and
possibly code execution when processing a crafted awk pattern in the
evaluate function. (CVE-2021-42383)

A use-after-free in Busybox's awk applet leads to denial of service and
possibly code execution when processing a crafted awk pattern in the
handle_special function. (CVE-2021-42384)

A use-after-free in Busybox's awk applet leads to denial of service and
possibly code execution when processing a crafted awk pattern in the
evaluate function. (CVE-2021-42385)

A use-after-free in Busybox's awk applet leads to denial of service and
possibly code execution when processing a crafted awk pattern in the
nvalloc function. (CVE-2021-42386)

References:
- https://bugs.mageia.org/show_bug.cgi?id=29697
- https://lists.fedoraproject.org/archives/list/[email protected]/thread/6T2TURBYYJGBMQTTN2DSOAIQGP7WCPGV/
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-42376
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-42377
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-42378
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-42379
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-42380
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-42381
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-42382
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-42383
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-42384
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-42385
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-42386

SRPMS:
- 8/core/busybox-1.34.1-1.mga8

Mageia 2021-0533: busybox security update

A NULL pointer dereference in Busybox's hush applet leads to denial of service when processing a crafted shell command, due to missing validation after a \x03 delimiter character

Summary

A NULL pointer dereference in Busybox's hush applet leads to denial of service when processing a crafted shell command, due to missing validation after a \x03 delimiter character. This may be used for DoS under very rare conditions of filtered command input. (CVE-2021-42376)
An attacker-controlled pointer free in Busybox's hush applet leads to denial of service and possible code execution when processing a crafted shell command, due to the shell mishandling the &&& string. This may be used for remote code execution under rare conditions of filtered command input. (CVE-2021-42377)
A use-after-free in Busybox's awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in the getvar_i function. (CVE-2021-42378)
A use-after-free in Busybox's awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in the next_input_file function. (CVE-2021-42379)
A use-after-free in Busybox's awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in the clrvar function. (CVE-2021-42380)
A use-after-free in Busybox's awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in the hash_init function. (CVE-2021-42381)
A use-after-free in Busybox's awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in the getvar_s function. (CVE-2021-42382)
A use-after-free in Busybox's awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in the evaluate function. (CVE-2021-42383)
A use-after-free in Busybox's awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in the handle_special function. (CVE-2021-42384)
A use-after-free in Busybox's awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in the evaluate function. (CVE-2021-42385)
A use-after-free in Busybox's awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in the nvalloc function. (CVE-2021-42386)

References

- https://bugs.mageia.org/show_bug.cgi?id=29697

- https://lists.fedoraproject.org/archives/list/[email protected]/thread/6T2TURBYYJGBMQTTN2DSOAIQGP7WCPGV/

- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-42376

- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-42377

- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-42378

- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-42379

- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-42380

- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-42381

- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-42382

- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-42383

- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-42384

- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-42385

- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-42386

Resolution

MGASA-2021-0533 - Updated busybox packages fix security vulnerability

SRPMS

- 8/core/busybox-1.34.1-1.mga8

Severity
Publication date: 02 Dec 2021
URL: https://advisories.mageia.org/MGASA-2021-0533.html
Type: security
CVE: CVE-2021-42376, CVE-2021-42377, CVE-2021-42378, CVE-2021-42379, CVE-2021-42380, CVE-2021-42381, CVE-2021-42382, CVE-2021-42383, CVE-2021-42384, CVE-2021-42385, CVE-2021-42386

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