CVE-2017-13677: Denial-of-service (DoS) vulnerability in the Symantec Advanced Secure Gateway (ASG) and ProxySG management con

This month

HIGH 7.5REMOTEUPGRADEUPGRADE

CVE-2017-13677 is a high-severity flaw (CVSS 7.5) affecting advanced secure gateway, symantec proxysg. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Denial-of-service (DoS) vulnerability in the Symantec Advanced Secure Gateway (ASG) and ProxySG management consoles. A remote attacker can use crafted HTTP/HTTPS requests to cause denial-of-service through management console application crashes.

Why this priority

High severity
EPSS top 8%: very likely to be exploited
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	5.0% (top 8%)
CISA exploited list	No
Published	2018-04-11
Last modified	2026-06-17

Publisher (CNA): Symantec Corporation · Vendor: broadcom

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2018-04-11 14:29 UTCPublished CVE record published
2026-06-17 01:04 UTCUpdated Record last modified

broadcom advanced secure gateway UPGRADE

Affected: >= 6.6 and < 6.6.5.14 · >= 6.7 and < 6.7.3.1

Fixed in: 6.6.5.14, 6.7.3.1

Safe to downgrade to: a release before 6.6

1. Check installed version

apt-cache policy advanced-secure-gateway || rpm -q advanced-secure-gateway || advanced-secure-gateway --version

2. UPGRADE to 6.6.5.14 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade advanced-secure-gateway

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade advanced-secure-gateway

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 6.6 (Debian / Ubuntu)

apt-cache madison advanced-secure-gateway sudo apt install advanced-secure-gateway=<VERSION_BEFORE_6.6> sudo apt-mark hold advanced-secure-gateway

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list advanced-secure-gateway sudo dnf downgrade advanced-secure-gateway-<VERSION_BEFORE_6.6> sudo dnf versionlock add advanced-secure-gateway

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

broadcom symantec proxysg UPGRADE

Affected: >= 6.5 and < 6.5.10.8 · >= 6.6 and < 6.6.5.14 · >= 6.7 and < 6.7.3.1

Fixed in: 6.5.10.8, 6.6.5.14, 6.7.3.1

Safe to downgrade to: a release before 6.5

1. Check installed version

apt-cache policy symantec-proxysg || rpm -q symantec-proxysg || symantec-proxysg --version

2. UPGRADE to 6.5.10.8 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade symantec-proxysg

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade symantec-proxysg

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 6.5 (Debian / Ubuntu)

apt-cache madison symantec-proxysg sudo apt install symantec-proxysg=<VERSION_BEFORE_6.5> sudo apt-mark hold symantec-proxysg

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list symantec-proxysg sudo dnf downgrade symantec-proxysg-<VERSION_BEFORE_6.5> sudo dnf versionlock add symantec-proxysg

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2017-13677?

advanced secure gateway: upgrade to 6.6.5.14, 6.7.3.1; symantec proxysg: upgrade to 6.5.10.8, 6.6.5.14, 6.7.3.1. Exact commands for each OS are on this page.

Is CVE-2017-13677 being exploited?

CVE-2017-13677 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2017-13677 affect?

CVE-2017-13677 affects advanced secure gateway, symantec proxysg. Severity is high (CVSS 7.5). Denial-of-service (DoS) vulnerability in the Symantec Advanced Secure Gateway (ASG) and ProxySG management consoles. A remote attacker can use crafted HTTP/HTTPS requests to cause denial-of-service through management console application cra

How urgent is CVE-2017-13677?

Priority 54/100. High severity; EPSS top 8%: very likely to be exploited; Remotely exploitable, no login, no user action

Software pages

Symantec and Broadcom vulnerabilities

Related CVEs

CVE-2023-23955 HIGH 8.1 UPGRADE UPGRADE Advanced Secure Gateway and Content Analysis, prior to 7.3.13.1 / 3.1.6.0, may be susceptible to a Server-Side
CVE-2023-23954 MEDIUM 5.4 UPGRADE UPGRADE Advanced Secure Gateway and Content Analysis, prior to 7.3.13.1 / 3.1.6.0, may be susceptible to a Stored Cros
CVE-2023-23953 HIGH 7.8 UPGRADE UPGRADE Advanced Secure Gateway and Content Analysis, prior to 7.3.13.1 / 3.1.6.0, may be susceptible to an Elevation
CVE-2023-23952 CRITICAL 9.8 UPGRADE UPGRADE Advanced Secure Gateway and Content Analysis, prior to 7.3.13.1 / 3.1.6.0, may be susceptible to a Command Inj
CVE-2021-46825 CRITICAL 9.1 DOWNGRADE DOWNGRADE Symantec Advanced Secure Gateway (ASG) and ProxySG are susceptible to an HTTP desync vulnerability

References

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