Mageia 2021-0533: busybox security update
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/package-announce@lists.fedoraproject.org/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