K23641249: KVM hypervisor vulnerability CVE-2020-2732

Security Advisory Description A flaw was discovered in the way that the KVM hypervisor handled instruction emulation for an L2 guest when nested virtualisation is enabled. Under some circumstances, an L2 guest may trick the L0 guest into accessing sensitive L1 resources that should be inaccessibl...

K80212034: Linux kernel vulnerability CVE-2021-3656

Security Advisory Description A flaw was found in the KVM's AMD code for supporting SVM nested virtualization. The flaw occurs when processing the VMCB virtual machine control block provided by the L1 guest to spawn/handle a nested guest L2. Due to improper validation of the "virtext" field, this...

SUSE CVE-2014-0222

Integer overflow in the qcowopen function in block/qcow.c in QEMU before 1.7.2 allows remote attackers to cause a denial of service crash via a large L2 table in a QCOW version 1 image...

SUSE CVE-2015-3221

OpenStack Neutron before 2014.2.4 juno and 2015.1.x before 2015.1.1 kilo, when using the IPTables firewall driver, allows remote authenticated users to cause a denial of service L2 agent crash by adding an address pair that is rejected by the ipset tool...

SUSE CVE-2021-26347

Failure to validate the integer operand in ASP AMD Secure Processor bootloader may allow an attacker to introduce an integer overflow in the L2 directory table in SPI flash resulting in a potential denial of service...

SUSE CVE-2021-37689

TensorFlow is an end-to-end open source platform for machine learning. In affected versions an attacker can craft a TFLite model that would trigger a null pointer dereference, which would result in a crash and denial of service. This is caused by the MLIR optimization of L2NormalizeReduceAxis...

CVE-2021-26346

Failure to validate the integer operand in ASP AMD Secure Processor bootloader may allow an attacker to introduce an integer overflow in the L2 directory table in SPI flash resulting in a potential denial of service...

CVE-2021-26346

Failure to validate the integer operand in ASP AMD Secure Processor bootloader may allow an attacker to introduce an integer overflow in the L2 directory table in SPI flash resulting in a potential denial of service...

CVE-2022-2196

The CVE-2022-2196 entry concerns a regression in Linux kernel KVM/nVMX where speculative execution could leak from an L2 guest to the host L1 due to inadequate Spectre v2 mitigations (retpolines/IBPB/eIBRS context). The description states an L2 attacker with code execution can influence indirect ...

Lack of validation on price feeds

Lines of code Vulnerability details Impact Lack of validation on Chainlink price feeds may result in incorrectly functioning or non-functioning protocol. For example: during high volatility a price feed may be suspended or become stale; on L2 networks the sequencer might be down on L2 networks th...

PT-2024-11845 · Linux +3 · Linux Kernel +3

Name of the Vulnerable Software and Affected Versions: Linux kernel affected versions not specified Description: The issue is related to an out-of-bounds access in the sja1105 init l2 policing function. This function initializes L2 policers to prevent interference with normal packet reception. Th...

No Allowlist For Bridgeable ERC-20 Tokens

Lines of code Vulnerability details Vulnerability Details We noticed that the deposit function of the L1ERC20Bridge contract code snippet 1 permits a user to bridge any ERC-20 tokens including deflationary and rebase tokens from the L1 to the L2 network. We considered that permitting non-standard...

L2 deposits might be reverted

Lines of code Vulnerability details Impact L1ERC20Bridge and L1EthBridge contracts have claimFailedDeposit function to withdraw funds from the initiated deposit, which failed when finalizing on L2. However, if the caller is allowed in senderCanCallFunction modifier, this function can be used to...

Mssing Crucial Checks When Unlocking funds for Withdraw Requests from L2

Lines of code Vulnerability details Impact Atomicity literally does not exist when users from L2 initiate a withdrawal by burning funds on the contract and sending the message to L1. This is giving malicious attackers plenty of time to stealthily launch a series of small and yet sizable forgery o...

Funds can be stolen

Lines of code Vulnerability details Impact For L2, any deposit finalization should come from L1 bridge address. Now the MailBox contract is currently helping to simulate such calls to be coming from L1. The problem is if within zkSync ecosystem, a contract is deployed with address same as L1 brid...

Asymmetric level of transaction validation between L1 side and L2.

Lines of code Vulnerability details Impact May have double counting of deposits? Proof of Concept On L1 side, there are validations that ensure funds don't get lost nor double counted. For example, finalizeWithdrawal may be called multiple times by allowed callers in case previous calls fail...

Aliasing L1 sender on L2

Lines of code Vulnerability details Impact If a contract on L1 has the same address as a contract on L2 but doesn't have the same code, we will have a critical issue, as funds will be lost. Proof of Concept Both Optimism and Arbitrum implements applyL1ToL2Alias / undoL1ToL2Alias logic to prevent ...

Bridge should not allow ERC20 tokens with double-entry point

Lines of code Vulnerability details Impact If a token with double-entry point is escrowed in L1 bridge, the user could withdraw their token through the other entry point, thus rugpulling the bridge. And when they actually withdraw from L2, they will take other users' funds from the bridge. Proof ...

Hacker can front-run the L2 ERC20 token deployment.

Lines of code Vulnerability details Impact hacker can front-run the L2 ERC20 token deployment to block L2 ERC20 token finalizeDeposit Proof of Concept I intend to prove this piece of code is front-runnable by hacker: /// @notice Finalize the deposit and mint funds /// @param l1Sender The account...

CVE-2022-3344

A flaw was found in the KVM's AMD nested virtualization SVM. A malicious L1 guest could purposely fail to intercept the shutdown of a cooperative nested guest L2, possibly leading to a page fault and kernel panic in the host L0...