Cisco Email Security Appliance Content Filter Bypass Vulnerability (cisco-sa-20190703-esa-bypass)

According to its self-reported version, Cisco Email Security Appliance ESA is affected by a vulnerability in the attachment scanning of Cisco AsyncOS Software due to improper input validation of the email body. An attacker can exploit this vulnerability by naming a malicious attachment with a...

Cisco Email Security Appliance Content Filter Bypass Vulnerability (cisco-sa-20190703-esa-filterpass)

According to its self-reported version, Cisco Email Security Appliance ESA is affected by a vulnerability in the email message scanning of Cisco AsyncOS Software due to improper input validation of certain email fields. An unauthenticated, remote attacker can exploit this vulnerability by sending...

Energy Sector Phish Swims Past Microsoft Email Security via Google Drive

A targeted spearphishing campaign has hit an organization in the energy sector – after using a savvy trick to get around the company’s Microsoft email security stack. According to Aaron Riley, a researcher from Cofense, the campaign impersonated the CEO of the targeted company, sending email via...

CVE-2019-1955

A vulnerability in the Sender Policy Framework SPF functionality of Cisco AsyncOS Software for Cisco Email Security Appliances ESA could allow an unauthenticated, remote attacker to bypass configured user filters on the device. The vulnerability is due to incomplete input and validation checking...

CVE-2019-1955

A vulnerability in the Sender Policy Framework SPF functionality of Cisco AsyncOS Software for Cisco Email Security Appliances ESA could allow an unauthenticated, remote attacker to bypass configured user filters on the device. The vulnerability is due to incomplete input and validation checking...

Input validation

A vulnerability in the Sender Policy Framework SPF functionality of Cisco AsyncOS Software for Cisco Email Security Appliances ESA could allow an unauthenticated, remote attacker to bypass configured user filters on the device. The vulnerability is due to incomplete input and validation checking...

CVE-2019-1955 Cisco Email Security Appliance Header Injection Vulnerability

A vulnerability in the Sender Policy Framework SPF functionality of Cisco AsyncOS Software for Cisco Email Security Appliances ESA could allow an unauthenticated, remote attacker to bypass configured user filters on the device. The vulnerability is due to incomplete input and validation checking...

CVE-2019-1955

Cisco AsyncOS (ESA) SPF handling vulnerability (CVE-2019-1955) allows an unauthenticated, remote attacker to bypass header filters by sending specially crafted SPF packets. Root cause is incomplete input/validation for SPF messages. Affected product: Cisco Email Security Appliance with AsyncOS; c...

CVE-2019-1955 Cisco Email Security Appliance Header Injection Vulnerability

A vulnerability in the Sender Policy Framework SPF functionality of Cisco AsyncOS Software for Cisco Email Security Appliances ESA could allow an unauthenticated, remote attacker to bypass configured user filters on the device. The vulnerability is due to incomplete input and validation checking...

Cisco Email Security Appliance AsyncOS Software Input Validation Error Vulnerability (CNVD-2020-16476)

Cisco Email Security Appliance ESA is an email security appliance from Cisco in the U.S. AsyncOS Software is the operating system that runs on it. An input validation error vulnerability exists in AsyncOS Software in the Cisco Email Security Appliance. The vulnerability stems from the lack of a...

Cisco Email Security Appliance Header Injection Vulnerability

A vulnerability in the Sender Policy Framework SPF functionality of Cisco AsyncOS Software for Cisco Email Security Appliances ESA could allow an unauthenticated, remote attacker to bypass configured user filters on the device. The vulnerability is due to incomplete input and validation checking...

ThreatList: DMARC Adoption Nonexistent at 80% of Orgs

About 80 percent of company web domains don’t have standard email authentication protections in place. That’s according to 250ok’s Global DMARC Adoption 2019 report, which analyzed 25,700 domains in the education, e-commerce, legal, financial services, SaaS and nonprofit sectors, as well as the...

The Unsexy Threat to Election Security

Much has been written about the need to further secure our elections, from ensuring the integrity of voting machines to combating fake news. But according to a report quietly issued by a California grand jury this week, more attention needs to be paid to securing social media and email accounts...

Threat Source newsletter (July 25, 2019)

Newsletter compiled by Jonathan Munshaw. Welcome to this week’s Threat Source newsletter — the perfect place to get caught up on all things Talos from the past week. No one really likes talking about election security. It’s a sticky subject, costs lots of money and doesn’t come with an easy fix...

Popular File-Sharing Service WeTransfer Used in Malicious Spam Campaigns

Hackers are abusing the popular file-sharing service called WeTransfer to circumvent defensive email gateways that are designed to block spam messages with malicious URLs. Researchers have observed an uptick in attacks targeting banking, power and media industries using this technique. The hack...

CVE-2019-11703

Summary (CVE-2019-11703) : A flaw in Thunderbird’s iCal handling causes a heap buffer overflow in libical’s parser_get_next_char, triggered by processing certain calendar-containing messages. The issue is documented to affect Thunderbird versions prior to 60.7.1, with public reports and advisorie...

Cisco Email Security Appliance Content Filter Bypass Vulnerability (cisco-sa-20190417-esa-filter-bypass)

According to its self-reported version, Cisco Email Security Appliance ESA is affected by following vulnerability - A vulnerability in the email message scanning of Cisco AsyncOS Software for Cisco Email Security Appliance ESA could allow an unauthenticated, remote attacker to bypass configured...

Cisco Email Security Appliance Filter Bypass Vulnerability (cisco-sa-20190501-esa-bypass)

According to its self-reported version, Cisco Email Security Appliance ESA is affected by following vulnerability - A vulnerability in certain attachment detection mechanisms of the Cisco Email Security Appliance ESA could allow an unauthenticated, remote attacker to bypass the filtering...

The vulnerability of Cisco Email Security Appliance’s security systems, which stems from insufficient validation of input data, allows attackers to bypass the configured content filters and compromise the integrity of the protected information.

The vulnerability of Cisco Email Security Appliance’s security systems exists due to insufficient validation of input data. Exploiting this vulnerability allows a malicious actor to bypass the configured content filters and compromise the integrity of the protected information...

The vulnerability of the email scanning function of the Cisco Email Security Appliance allows a perpetrator to inject any arbitrary script code into an email message.

The vulnerability of email scanning functions in Cisco Email Security Appliance exists due to insufficient validation of input data. Exploiting this vulnerability allows a malicious actor to inject arbitrary script code into an email message remotely...