Debuger

**Name of the Vulnerable Software and Affected Versions** Tor versions prior to 0.2.1.29 Tor versions 0.2.2.x prior to 0.2.2.21-alpha **Description** The issue arises from improper checking of the amount of compression in zlib-compressed data, allowing remote attackers to cause a denial of service via a large compression factor. **Recommendations** For Tor versions prior to 0.2.1.29, update to version 0.2.1.29 or later. For Tor versions 0.2.2.x prior to 0.2.2.21-alpha, update to version 0.2.2.21-alpha or later.

**Name of the Vulnerable Software and Affected Versions** Tor versions prior to 0.2.1.29 Tor versions 0.2.2.x prior to 0.2.2.21-alpha **Description** The issue is related to the improper management of key data in memory. This could potentially allow local users to obtain sensitive information by reading memory that was previously used by a different process. **Recommendations** For Tor versions prior to 0.2.1.29, update to version 0.2.1.29 or later. For Tor versions 0.2.2.x prior to 0.2.2.21-alpha, update to version 0.2.2.21-alpha or later.

**Name of the Vulnerable Software and Affected Versions** Tor versions prior to 0.2.1.29 Tor versions 0.2.2.x prior to 0.2.2.21-alpha **Description** The issue is a heap-based buffer overflow that can be exploited by remote attackers. This can cause a denial of service due to memory corruption and application crash, or potentially allow the execution of arbitrary code. The exact vectors used for the exploitation are not specified. **Recommendations** For Tor versions prior to 0.2.1.29, update to version 0.2.1.29 or later. For Tor versions 0.2.2.x prior to 0.2.2.21-alpha, update to version 0.2.2.21-alpha or later.

**Name of the Vulnerable Software and Affected Versions** Tor versions prior to 0.2.1.29 Tor versions 0.2.2.x prior to 0.2.2.21-alpha **Description** The issue allows remote attackers to cause a denial of service, potentially leading to a daemon crash, by triggering certain log messages. This is due to calls made to Libevent within Libevent log handlers. **Recommendations** For Tor versions prior to 0.2.1.29, update to version 0.2.1.29 or later. For Tor versions 0.2.2.x prior to 0.2.2.21-alpha, update to version 0.2.2.21-alpha or later.

**Name of the Vulnerable Software and Affected Versions** Tor versions prior to 0.2.1.29 Tor versions 0.2.2.x prior to 0.2.2.21-alpha **Description** The issue is related to the `tor realloc` function, which does not validate a certain size value during memory allocation. This could allow remote attackers to cause a denial of service, resulting in a daemon crash, via unspecified vectors. The problem is related to underflow errors. **Recommendations** For Tor versions prior to 0.2.1.29, update to version 0.2.1.29 or later. For Tor versions 0.2.2.x prior to 0.2.2.21-alpha, update to version 0.2.2.21-alpha or later.

**Name of the Vulnerable Software and Affected Versions** Tor versions prior to 0.2.1.29 Tor versions 0.2.2.x prior to 0.2.2.21-alpha **Description** The issue allows remote attackers to cause a denial of service, resulting in an assertion failure and daemon exit, via blobs that trigger a certain file size. **Recommendations** For Tor versions prior to 0.2.1.29, update to version 0.2.1.29 or later. For Tor versions 0.2.2.x prior to 0.2.2.21-alpha, update to version 0.2.2.21-alpha or later.

**Name of the Vulnerable Software and Affected Versions** Tor versions prior to 0.2.1.29 Tor versions 0.2.2.x prior to 0.2.2.21-alpha **Description** The issue might allow remote attackers to cause a denial of service, resulting in an assertion failure and daemon exit. This is related to vectors involving malformed router caches and improper handling of integer values. **Recommendations** For Tor versions prior to 0.2.1.29, update to version 0.2.1.29 or later. For Tor versions 0.2.2.x prior to 0.2.2.21-alpha, update to version 0.2.2.21-alpha or later.