CVE-2017-11521: The SdpContents::Session::Medium::parse function in resip/stack/SdpContents.cxx in reSIProcate 1.10.2 allows r

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HIGH 7.5REMOTEWATCHLISTDOWNGRADEMITIGATE

CVE-2017-11521 is a high-severity flaw (CVSS 7.5) affecting resiprocate, debian linux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The SdpContents::Session::Medium::parse function in resip/stack/SdpContents.cxx in reSIProcate 1.10.2 allows remote attackers to cause a denial of service (memory consumption) by triggering many media connections.

Why this priority

High severity
Remotely exploitable, no login, no user action
On your watchlist

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	2.3% (top 16%)
CISA exploited list	No
Weakness	CWE-400
Published	2017-07-22
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: debian · resiprocate

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

Am I affected?

Timeline

2017-07-22 18:29 UTCPublished CVE record published
2026-06-17 01:01 UTCUpdated Record last modified

resiprocate resiprocate DOWNGRADE

Affected: 1.10.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.10.2

1. Check installed version

apt-cache policy resiprocate || rpm -q resiprocate || resiprocate --version

2. No fixed release: DOWNGRADE to a release before 1.10.2 (Debian / Ubuntu)

apt-cache madison resiprocate sudo apt install resiprocate=<VERSION_BEFORE_1.10.2> sudo apt-mark hold resiprocate

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list resiprocate sudo dnf downgrade resiprocate-<VERSION_BEFORE_1.10.2> sudo dnf versionlock add resiprocate

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.

debian debian linux MITIGATE

Affected: 8.0 · 9.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 8.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

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-2017-11521?

resiprocate: downgrade or apply the listed mitigation; debian linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2017-11521 being exploited?

CVE-2017-11521 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-2017-11521 affect?

CVE-2017-11521 affects resiprocate, debian linux. Severity is high (CVSS 7.5). The SdpContents::Session::Medium::parse function in resip/stack/SdpContents.cxx in reSIProcate 1.10.2 allows remote attackers to cause a denial of service (memory consumption) by triggering many media connections.

How urgent is CVE-2017-11521?

Priority 57/100. High severity; Remotely exploitable, no login, no user action; On your watchlist

Software pages

Debian vulnerabilities

Related CVEs

CVE-2018-12584 CRITICAL 9.8 UPGRADE MITIGATE The ConnectionBase::preparseNewBytes function in resip/stack/ConnectionBase.cxx in reSIProcate through 1.10.2
CVE-2017-9454 HIGH 7.5 UPGRADE Buffer overflow in the ares_parse_a_reply function in the embedded ares library in ReSIProcate before 1.12.0 a

References

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