Hiredis is a minimalistic C client library for the Redis database. In affected versions Hiredis is vulnurable to integer overflow if provided maliciously crafted or corrupted `RESP` `mult-bulk` protocol data. When parsing `multi-bulk` (array-like) replies, hiredis fails to check if `count * sizeof(redisReply*)` can be represented in `SIZE_MAX`. If it can not, and the `calloc()` call doesn't itself make this check, it would result in a short allocation and subsequent buffer overflow. Users of hiredis who are unable to update may set the [maxelements](https://github.com/redis/hiredis#reader-max-array-elements) context option to a value small enough that no overflow is possible.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - Hiredis is a minimalistic C client library for the Redis database. In affected versions Hiredis is     vulnurable to integer overflow if provided maliciously crafted or corrupted `RESP` `mult-bulk` protocol     data. When parsing `multi-bulk` (array-like) replies, hiredis fails to check if `count *     sizeof(redisReply*)` can be represented in `SIZE_MAX`. If it can not, and the `calloc()` call doesn't     itself make this check, it would result in a short allocation and subsequent buffer overflow. Users of     hiredis who are unable to update may set the [maxelements](https://github.com/redis/hiredis#reader-max-     array-elements) context option to a value small enough that no overflow is possible. (CVE-2021-32765)

Note that Nessus relies on the presence of the package as reported by the vendor.

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the 2220827b-c732-11ec-b272-901b0e934d69 advisory.

  - Hiredis is a minimalistic C client library for the Redis database. In affected versions Hiredis is     vulnurable to integer overflow if provided maliciously crafted or corrupted `RESP` `mult-bulk` protocol     data. When parsing `multi-bulk` (array-like) replies, hiredis fails to check if `count *     sizeof(redisReply*)` can be represented in `SIZE_MAX`. If it can not, and the `calloc()` call doesn't     itself make this check, it would result in a short allocation and subsequent buffer overflow. Users of     hiredis who are unable to update may set the [maxelements](https://github.com/redis/hiredis#reader-max-     array-elements) context option to a value small enough that no overflow is possible. (CVE-2021-32765)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The version of hiredis installed on the remote host is prior to 0.13.3-17. It is, therefore, affected by a vulnerability as referenced in the ALAS2REDIS6-2023-004 advisory.

    Hiredis is a minimalistic C client library for the Redis database. In affected versions Hiredis is     vulnurable to integer overflow if provided maliciously crafted or corrupted `RESP` `mult-bulk` protocol     data. When parsing `multi-bulk` (array-like) replies, hiredis fails to check if `count *     sizeof(redisReply*)` can be represented in `SIZE_MAX`. If it can not, and the `calloc()` call doesn't     itself make this check, it would result in a short allocation and subsequent buffer overflow. Users of     hiredis who are unable to update may set the [maxelements](https://github.com/redis/hiredis#reader-max-     array-elements) context option to a value small enough that no overflow is possible. (CVE-2021-32765)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote host is affected by the vulnerability described in GLSA-202210-32 (hiredis, hiredis-py: Multiple Vulnerabilities)

  - Hiredis is a minimalistic C client library for the Redis database. In affected versions Hiredis is     vulnurable to integer overflow if provided maliciously crafted or corrupted `RESP` `mult-bulk` protocol     data. When parsing `multi-bulk` (array-like) replies, hiredis fails to check if `count *     sizeof(redisReply*)` can be represented in `SIZE_MAX`. If it can not, and the `calloc()` call doesn't     itself make this check, it would result in a short allocation and subsequent buffer overflow. Users of     hiredis who are unable to update may set the [maxelements](https://github.com/redis/hiredis#reader-max-     array-elements) context option to a value small enough that no overflow is possible. (CVE-2021-32765)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SUSE15 host has packages installed that are affected by a vulnerability as referenced in the openSUSE-SU-2021:1536-1 advisory.

  - Hiredis is a minimalistic C client library for the Redis database. In affected versions Hiredis is     vulnurable to integer overflow if provided maliciously crafted or corrupted `RESP` `mult-bulk` protocol     data. When parsing `multi-bulk` (array-like) replies, hiredis fails to check if `count *     sizeof(redisReply*)` can be represented in `SIZE_MAX`. If it can not, and the `calloc()` call doesn't     itself make this check, it would result in a short allocation and subsequent buffer overflow. Users of     hiredis who are unable to update may set the [maxelements](https://github.com/redis/hiredis#reader-max-     array-elements) context option to a value small enough that no overflow is possible. (CVE-2021-32765)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Debian 9 host has packages installed that are affected by a vulnerability as referenced in the dla-2783 advisory.

  - Hiredis is a minimalistic C client library for the Redis database. In affected versions Hiredis is     vulnurable to integer overflow if provided maliciously crafted or corrupted `RESP` `mult-bulk` protocol     data. When parsing `multi-bulk` (array-like) replies, hiredis fails to check if `count *     sizeof(redisReply*)` can be represented in `SIZE_MAX`. If it can not, and the `calloc()` call doesn't     itself make this check, it would result in a short allocation and subsequent buffer overflow. Users of     hiredis who are unable to update may set the [maxelements](https://github.com/redis/hiredis#reader-max-     array-elements) context option to a value small enough that no overflow is possible. (CVE-2021-32765)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
223925	Linux Distros Unpatched Vulnerability : CVE-2021-32765	Nessus	Misc.	high
184469	FreeBSD : hiredis -- integer/buffer overflow (2220827b-c732-11ec-b272-901b0e934d69)	Nessus	FreeBSD Local Security Checks	high
182046	Amazon Linux 2 : hiredis (ALASREDIS6-2023-004)	Nessus	Amazon Linux Local Security Checks	high
166737	GLSA-202210-32 : hiredis, hiredis-py: Multiple Vulnerabilities	Nessus	Gentoo Local Security Checks	high
155887	openSUSE 15 Security Update : hiredis (openSUSE-SU-2021:1536-1)	Nessus	SuSE Local Security Checks	high
154021	Debian DLA-2783-1 : hiredis - LTS security update	Nessus	Debian Local Security Checks	high

Detections

Analytics

CVE-2021-32765

high

Tenable Plugins

high

high

high

high

high

high