Some figures are more likely to be drawn

Lines of code Vulnerability details Description The function reconstructTicket generate the winning ticket the from the ramdom number generated by Chainlink VRF V2. The design of this function makes the occurrence of some numbers more likely than others. Impact With the current implementation and...

Lottery owner can rig the draw to win the jackpot by swapping the source

Lines of code Vulnerability details Lottery owner can rig the draw to win the jackpot by swapping the source Impact The lottery owner has the ability to swap the Random Source under certain cirumstances, and this can be exploited to set a new source contract that returns any number set by it. Thi...

Lottery owner can manipulate the RNG to favour themselves, or other certain participants

Lines of code Vulnerability details The docs state that Chainlink VRF will be used as the source of randomness, whose subscription model is described here. A call is made to Chainlink's VRFCoordinatorV2 requestRandomWords function, after which a response is sent back in the form of a call to...

Miners Can Re-Roll the VRF Output to Game the Protocol

Lines of code Vulnerability details Impact Miners are able to rewrite a chain's history if they dislike the VRF output used by the protocol. Consider the following example: A miner or well-funded user is participating in the PoolTogether protocol. A VRF request is made and fulfilled in the same...

Malicious ChainLink's VRF manager can decide to not whitelist VRFNFTRandomDraw or brick ongoing raffles

Lines of code Vulnerability details Impact ChainLinks VRF manager has priviledged position, as all VRFNFTRandomDraw instances share the same VRFCoordinatorV2 address, and have to be whitelisted in order to be able to send requestRandomWords function. There is centralization risk in this case, tha...

If the subscription does not have enough funds the winner can not be chosen

Lines of code Vulnerability details Impact VRF's subscriptionId can be chosen by the drawer, and it is the drawer's responsibility to fund the subscription. If the drawer, maliciously or not, fails to do so, the draw will result in no winners, and the drawer can re-claim the offered NFT...

Cisco IOS XE Software IPv6 VPN over MPLS DoS (cisco-sa-iosxe-6vpe-dos-tJBtf5Zv)

A vulnerability in the implementation of IPv6 VPN over MPLS 6VPE with Zone-Based Firewall ZBFW of Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to cause a denial of service condition on an affected device. This vulnerability is due to improper error handling of an IPv6...

VRF v1 is depreciated but v2 has different interface

Lines of code Vulnerability details Impact Since VRF v2 is replacing v1, v1 interface might be unavailable some day in the future. Since the v2 interface is different, at that time, the functions depend on VRF v1 will not work. The protocol will not operate due to denial of service. Proof of...

ArtGobblers contract wouldn't receive a random seed forever by a malicious user.

Lines of code Vulnerability details Impact ArtGobblers contract wouldn't receive a random seed forever by a malicious user. Currently it can't execute revealGobblers and upgradeRandProvider when gobblerRevealsData.waitingForSeed == true. So if the contract fails to receive the random seed after...

Chainlink requests may fail if LINK balance is too low. Reveal feature halted. The unfair disadvantage for holders with unrevealed Gobblers

Lines of code Vulnerability details Impact Chainlink requests may fail if LINK balance is too low. Reveal feature halted. The unfair disadvantage for holders with unrevealed Gobblers Proof of Concept Chainlink VRF V1 oracle works only if the caller has LINK balance high enough to pay the fees. If...

Miners Can Re-Roll the VRF Output to Game the Protocol

Handle leastwood Vulnerability details Impact Miners are able to rewrite a chain's history if they dislike the VRF output used by the protocol. Consider the following example: A miner or well-funded user is participating in the PoolTogether protocol. A VRF request is made and fulfilled in the sam...

Insecure randomness in getPseudoRand(uint256 modulus){} function

Handle JMukesh Vulnerability details Impact insecure randomness due to a modulo on block.timestamp, now or blockhash. These can be influenced by miners to some extent so they should be avoided Proof of Concept Tools Used slither Recommended Mitigation Steps use chainlink vrf --- The text was...

The randomIndex() can be determined

Handle s1m0 Vulnerability details Impact The function randomIndex is used to choose which id to mint theoretically randomly. The index can be computed with a smartContract by giving him through arguments the internal/private variables numTokens and nonce gotten with getStorageAt. Note there is al...

Security Advisory 0055

Security Advisory 0055 PDF Date: December 16th, 2020 Version: 1.0 Revision | Date | Changes ---|---|--- 1.0 | December 16th, 2020 | Initial Release The CVE-ID tracking this issue: CVE-2020-26568 CVSSv3.1 Base Score: 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N Description This advisory...

Remote code execution

An internal security review has identified an unauthenticated remote code execution vulnerability in Cloud Networking Operating System CNOS’ optional REST API management interface. This interface is disabled by default and not vulnerable unless enabled. When enabled, it is only vulnerable where...

CVE-2020-8349

An internal security review has identified an unauthenticated remote code execution vulnerability in Cloud Networking Operating System CNOS’ optional REST API management interface. This interface is disabled by default and not vulnerable unless enabled. When enabled, it is only vulnerable where...

CVE-2020-8349

An internal security review has identified an unauthenticated remote code execution vulnerability in Cloud Networking Operating System CNOS’ optional REST API management interface. This interface is disabled by default and not vulnerable unless enabled. When enabled, it is only vulnerable where...

CVE-2020-8349

CVE-2020-8349 affects Cloud Networking Operating System (CNOS) via the optional REST API management interface. The vulnerability is unauthenticated remote code execution that is not present when the REST API interface is disabled; if enabled, access is limited to the VRF and governed by ACLs. Imp...

CVE-2020-8349: Improper Input Validation

An internal security review has identified an unauthenticated remote code execution vulnerability in Cloud Networking Operating System CNOS’ optional REST API management interface. This interface is disabled by default and not vulnerable unless enabled. When enabled, it is only vulnerable where...

PT-2020-20116

Name of the Vulnerable Software and Affected Versions Cloud Networking Operating System CNOS affected versions not specified Description An unauthenticated remote code execution issue has been identified in the optional REST API management interface of Cloud Networking Operating System CNOS. This...