#dos

Ubuntu Security Notice 5436-1 - Tobias Stoeckmann discovered that libXrender incorrectly handled certain responses. An attacker could possibly use this issue to cause a denial of service, or possibly execute arbitrary code.

Ubuntu Security Notice 5434-1 - Multiple security issues were discovered in Thunderbird. If a user were tricked into opening a specially crafted website in a browsing context, an attacker could potentially exploit these to cause a denial of service, bypass permission prompts, obtain sensitive information, bypass security restrictions, cause user confusion, or execute arbitrary code. It was discovered that Thunderbird would show the wrong security status after viewing an attached message that is signed or encrypted. An attacker could potentially exploit this by tricking the user into trusting the authenticity of a message.

Ubuntu Security Notice 5435-1 - Multiple security issues were discovered in Thunderbird. If a user were tricked into opening a specially crafted website in a browsing context, an attacker could potentially exploit these to cause a denial of service, bypass permission prompts, obtain sensitive information, bypass security restrictions, cause user confusion, or execute arbitrary code. It was discovered that Thunderbird would show the wrong security status after viewing an attached message that is signed or encrypted. An attacker could potentially exploit this by tricking the user into trusting the authenticity of a message.

Ubuntu Security Notice 5433-1 - It was discovered that Vim incorrectly handled parsing of filenames in its search functionality. If a user were tricked into opening a specially crafted file, an attacker could crash the application, leading to a denial of service. It was discovered that Vim incorrectly handled memory when opening and searching the contents of certain files. If a user were tricked into opening a specially crafted file, an attacker could crash the application, leading to a denial of service, or possibly achieve code execution with user privileges.

### Impact The implementation of [`tf.raw_ops.TensorSummaryV2`](https://github.com/tensorflow/tensorflow/blob/f3b9bf4c3c0597563b289c0512e98d4ce81f886e/tensorflow/core/kernels/summary_tensor_op.cc#L33-L58) does not fully validate the input arguments. This results in a `CHECK`-failure which can be used to trigger a denial of service attack: ```python import numpy as np import tensorflow as tf tf.raw_ops.TensorSummaryV2( tag=np.array('test'), tensor=np.array(3), serialized_summary_metadata=tf.io.encode_base64(np.empty((0)))) ``` The code assumes `axis` is a scalar but there is no validation for this. ```cc const Tensor& serialized_summary_metadata_tensor = c->input(2); // ... ParseFromTString(serialized_summary_metadata_tensor.scalar<tstring>()(), v->mutable_metadata()); ``` ### Patches We have patched the issue in GitHub commit [290bb05c80c327ed74fae1d089f1001b1e2a4ef7](https://github.com/tensorflow/tensorflow/commit/290bb05c80c327ed74fae1d089...

Totolink A3600R V4.1.2cu.5182_B20201102 was discovered to contain a stacker overflow in the fread function at infostat.cgi. This vulnerability allows attackers to cause a Denial of Service (DoS) via the parameter CONTENT_LENGTH.

In 2020, MSRC awarded two Identity Project Research Grants to support external researchers working to further strengthen the security of identity protocols and systems. Today we are pleased to release the results of the first of these projects. This research, led by independent security researcher Avinash Sudhodanan, investigated account pre-hijacking – a new class of … New Research Paper: Pre-hijacking Attacks on Web User Accounts Read More »

Windows OS can be configured to overlay a “language bar” on top of any application. When this OS functionality is enabled, the OS language bar UI will be viewable in the browser alongside the AVEVA InTouch Access Anywhere and Plant SCADA Access Anywhere applications. It is possible to manipulate the Windows OS language bar to launch an OS command prompt, resulting in a context-escape from application into OS.

Analysts have seen a massive spike in malicious activity by the XorDdos trojan in the last six months, against Linux cloud and IoT infrastructures .

Ubuntu Security Notice 5432-1 - It was discovered that libpng incorrectly handled memory when parsing certain PNG files. If a user or automated system were tricked into opening a specially crafted PNG file, an attacker could use this issue to cause libpng to crash, resulting in a denial of service, or possible execute arbitrary code. Zhengxiong Luo discovered that libpng incorrectly handled memory when parsing certain PNG files. If a user or automated system were tricked into opening a specially crafted PNG file, an attacker could use this issue to cause libpng to crash, resulting in a denial of service, or possible execute arbitrary code.