CVE-2015-3277: The mod_nss module before 1.0.11 in Fedora allows remote attackers to obtain cipher lists due to incorrect par

Q: How do I fix CVE-2015-3277?

mod nss: upgrade to newer than 1.0.10. Exact commands for each OS are on this page.

Q: Is CVE-2015-3277 being exploited?

CVE-2015-3277 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2015-3277 affect?

CVE-2015-3277 affects mod nss. Severity is high (CVSS 7.5). The mod_nss module before 1.0.11 in Fedora allows remote attackers to obtain cipher lists due to incorrect parsing of multi-keyword cipherstring.

Q: How urgent is CVE-2015-3277?

Priority 52/100. High severity; Remotely exploitable, no login, no user action

This month

HIGH 7.5REMOTEUPGRADE

CVE-2015-3277 is a high-severity flaw (CVSS 7.5) affecting mod nss. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The mod_nss module before 1.0.11 in Fedora allows remote attackers to obtain cipher lists due to incorrect parsing of multi-keyword cipherstring.

Why this priority

High severity
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	2.5% (top 15%)
CISA exploited list	No
Weakness	CWE-200
Published	2017-08-09
Last modified	2026-06-17

Publisher (CNA): Red Hat, Inc. · Vendor: mod nss project

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

Am I affected?

Timeline

2017-08-09 18:29 UTCPublished CVE record published
2026-06-17 00:25 UTCUpdated Record last modified

mod nss project mod nss UPGRADE

Affected: <= 1.0.10

Fixed in: newer than 1.0.10

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy mod-nss || rpm -q mod-nss || mod-nss --version

2. UPGRADE to newer than 1.0.10 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade mod-nss

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade mod-nss

Note

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

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-2015-3277?

mod nss: upgrade to newer than 1.0.10. Exact commands for each OS are on this page.

Is CVE-2015-3277 being exploited?

CVE-2015-3277 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-2015-3277 affect?

CVE-2015-3277 affects mod nss. Severity is high (CVSS 7.5). The mod_nss module before 1.0.11 in Fedora allows remote attackers to obtain cipher lists due to incorrect parsing of multi-keyword cipherstring.

How urgent is CVE-2015-3277?

Priority 52/100. High severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2015-5244 CRITICAL 9.8 UPGRADE The NSSCipherSuite option with ciphersuites enabled in mod_nss before 1.0.12 allows remote attackers to bypass
CVE-2011-4973 CRITICAL 9.8 DOWNGRADE Authentication bypass vulnerability in mod_nss 1.0.8 allows remote attackers to assume the identity of a valid

References

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