K000135439 : libtar vulnerabilities CVE-2021-33643, CVE-2021-33644, CVE-2021-33645, CVE-2021-33646

Security Advisory Description

• CVE-2021-33643

An attacker who submits a crafted tar file with size in header struct being 0 may be able to trigger an calling of malloc(0) for a variable gnu_longlink, causing an out-of-bounds read.

• CVE-2021-33644

An attacker who submits a crafted tar file with size in header struct being 0 may be able to trigger an calling of malloc(0) for a variable gnu_longname, causing an out-of-bounds read.

• CVE-2021-33645

The th_read() function doesn’t free a variable t->th_buf.gnu_longlink after allocating memory, which may cause a memory leak.

• CVE-2021-33646

The th_read() function doesn’t free a variable t->th_buf.gnu_longname after allocating memory, which may cause a memory leak.

Impact

There is no impact; F5 products are not affected by this vulnerability.